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A G R E A T E R M E A S U R E O F C O N F I D E N C E
Plug-in cards for Series 3700 mainframes
Series 3700
Plug-in Cards for Series 3700 Mainframes
SWITCHING AND CONTROL
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A G R E A T E R M E A S U R E O F C O N F I D E N C E
Plug-in cards for Series 3700 mainframes
Specifications for Plug-In Cards
Additional Series 3700 cards are currently in development. For a current list of cards and specifications,
visit www.keithley.com.
3720 3721 3722 3723 3724 3730 3731 3732 3740 3750
Page 468 10 12 15 17 19 23 25
No. of Channels 60 (Dual 1×30) 40 (dual 1×20) 96 (dual 1×48)
60 (dual 1×30) or
120 single pole
(dual 1×60)
60 (dual 1×30) 6×16 6×16 448 crosspoints
(Quad 4×28) 32
40 digital I/O, 4
counter/totalizers,
and 2 isolated analog
outputs
Card Config. Multiplexer Multiplexer Multiplexer Multiplexer Multiplexer Matrix Matrix Matrix Independent Independent
Type of Relay Latching
electromechanical
Latching
electromechanical
Latching
electromechanical Dry reed FET solid-state Latching
electromechanical Dry reed Dry reed Latching
electromechanical N/A
Contact Configuration 2 Form A 2 Form A 2 Form A 1 Form A 2 Form A 2 Form A 2 Form A 1 Form A 28 Form C, 4 Form A N/A
Max. Voltage 300 V 300 V (ch 1–40),
60 V (ch 41–42) 300 V 200 V 200 V 300 V 200 V 200 V 300 VDC/250 VAC
(Form A) N/A
Max. Current Switched 1 A 2 A (ch 1–40),
3 A (ch 41–42) 1 A 1 A 0.1 A 1 A 1 A 0.75 A 2 A (Form C), 7 A
(Form A) N/A
Comments 2 independent 1×30
multiplexers. Automatic
temperature reference
when used with screw
terminal accessory
(Model 3720-ST)
2 independent 1×20
multiplexers. Automatic
temperature reference
when used with screw
terminal accessory
(Model 3721-ST)
2 independent 1×48
multiplexers
2 independent 1×30
multiplexers
2 independent
1×30 multiplexers.
Automatic
temperature
reference when used
with screw terminal
accessory (Model
3724-ST)
Columns can be
expanded through
the backplane or
isolated by relays
Relay actuation time
of 0.5ms. Columns
can be expanded
through the
backplane or isolated
by relays
Banks can be
connected
together via bank
configuration relays
to create a single
4×112 or dual 4×56
matrix. Analog
backplane relays also
included for card
to card expansion.
Row expansion with
3732-ST-R accessory
to create a dual 8×28
or single 16×28
matrix.
32 general purpose
independent
channels.
All-in-one card
design. 40
bidirectional
I/O. Four 32-bit
counter/totalizers.
2 programmable
analog (V or I)
outputs.
Plug-in Card Accessories
3720 3721 3722 3723 3724 3730 3731 3732 3740 3750
Cables 3720-MTC-1.5,
3720-MTC-3
3721-MTC-1.5,
3721-MTC-3
3722-MTC-1.5,
3722-MTC-1.5/MM,
3722-MTC-3,
3722-MTC-3/MM
3720-MTC-1.5,
3720-MTC-3
3720-MTC-1.5,
3720-MTC-3
3721-MTC-1.5,
3721-MTC-3
3721-MTC-1.5,
3721-MTC-3
3720-MTC-1.5,
3720-MTC-3
3721-MTC-1.5,
3721-MTC-3
3721-MTC-1.5,
3721-MTC-3
Screw Terminal Block 3720-ST 3721-ST 3723-ST, 3723-ST-1 3724-ST 3730-ST 3731-ST
3732-ST-C, 3732-ST-R
3740-ST 3750-ST
Connector Kits 3791-KIT78-R 3790-KIT50-R 3792-KIT104-R,
3792-KIT104-R/F 3791-KIT78-R 3791-KIT78-R 3790-KIT50-R 3790-KIT50-R 3791-KIT78-R 3790-KIT50-R 3790-KIT50-R
Tools 3791-CIT 3791-CIT 3791-CIT 3791-CIT 3791-CIT
Series 3700
Plug-in Cards for Series 3700 Mainframes
• Multiplexer, matrix, and
I/O cards
• Relay closures automatically
counted and stored in each
card’s onboard memory
• Unlimited contact life with
solid-state relay (Model 3724)
• Automatic CJC for temperature
measurements when used
with screw terminal accessory
(Models 3720, 3721, 3724)
Ordering Information
3720 Dual 1×30 Multiplexer Card 4
3721 Dual 1×20 Multiplexer Card 6
3722 Dual 1×48, High Density,
Multiplexer Card. . . . . . . . .8
3723 Dual 1×30, High
Speed, Reed Relay,
Multiplexer Card. . . . . . . .10
3724 Dual 1×30 FET
Multiplexer Card. . . . . . . .12
3730 6×16, High Density,
Matrix Card . . . . . . . . . . . .15
3731 6×16, High Speed, Reed
Relay, Matrix Card . . . . . .17
3732 Quad 4×28, Ultra-High
Density, Reed Relay,
Matrix Card . . . . . . . . . . . .19
3740 General Purpose Card
with 32 Independent
Channels ..............23
3750 Multifunction Control Card 25
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A G R E A T E R M E A S U R E O F C O N F I D E N C E
Plug-in cards for Series 3700 mainframes
Specifications for Plug-In Cards
Additional Series 3700 cards are currently in development. For a current list of cards and specifications,
visit www.keithley.com.
3720 3721 3722 3723 3724 3730 3731 3732 3740 3750
Page 468 10 12 15 17 19 23 25
No. of Channels 60 (Dual 1×30) 40 (dual 1×20) 96 (dual 1×48)
60 (dual 1×30) or
120 single pole
(dual 1×60)
60 (dual 1×30) 6×16 6×16 448 crosspoints
(Quad 4×28) 32
40 digital I/O, 4
counter/totalizers,
and 2 isolated analog
outputs
Card Config. Multiplexer Multiplexer Multiplexer Multiplexer Multiplexer Matrix Matrix Matrix Independent Independent
Type of Relay Latching
electromechanical
Latching
electromechanical
Latching
electromechanical Dry reed FET solid-state Latching
electromechanical Dry reed Dry reed Latching
electromechanical N/A
Contact Configuration 2 Form A 2 Form A 2 Form A 1 Form A 2 Form A 2 Form A 2 Form A 1 Form A 28 Form C, 4 Form A N/A
Max. Voltage 300 V 300 V (ch 1–40),
60 V (ch 41–42) 300 V 200 V 200 V 300 V 200 V 200 V 300 VDC/250 VAC
(Form A) N/A
Max. Current Switched 1 A 2 A (ch 1–40),
3 A (ch 41–42) 1 A 1 A 0.1 A 1 A 1 A 0.75 A 2 A (Form C), 7 A
(Form A) N/A
Comments 2 independent 1×30
multiplexers. Automatic
temperature reference
when used with screw
terminal accessory
(Model 3720-ST)
2 independent 1×20
multiplexers. Automatic
temperature reference
when used with screw
terminal accessory
(Model 3721-ST)
2 independent 1×48
multiplexers
2 independent 1×30
multiplexers
2 independent
1×30 multiplexers.
Automatic
temperature
reference when used
with screw terminal
accessory (Model
3724-ST)
Columns can be
expanded through
the backplane or
isolated by relays
Relay actuation time
of 0.5ms. Columns
can be expanded
through the
backplane or isolated
by relays
Banks can be
connected
together via bank
configuration relays
to create a single
4×112 or dual 4×56
matrix. Analog
backplane relays also
included for card
to card expansion.
Row expansion with
3732-ST-R accessory
to create a dual 8×28
or single 16×28
matrix.
32 general purpose
independent
channels.
All-in-one card
design. 40
bidirectional
I/O. Four 32-bit
counter/totalizers.
2 programmable
analog (V or I)
outputs.
Plug-in Card Accessories
3720 3721 3722 3723 3724 3730 3731 3732 3740 3750
Cables 3720-MTC-1.5,
3720-MTC-3
3721-MTC-1.5,
3721-MTC-3
3722-MTC-1.5,
3722-MTC-1.5/MM,
3722-MTC-3,
3722-MTC-3/MM
3720-MTC-1.5,
3720-MTC-3
3720-MTC-1.5,
3720-MTC-3
3721-MTC-1.5,
3721-MTC-3
3721-MTC-1.5,
3721-MTC-3
3720-MTC-1.5,
3720-MTC-3
3721-MTC-1.5,
3721-MTC-3
3721-MTC-1.5,
3721-MTC-3
Screw Terminal Block 3720-ST 3721-ST 3723-ST, 3723-ST-1 3724-ST 3730-ST 3731-ST
3732-ST-C, 3732-ST-R
3740-ST 3750-ST
Connector Kits 3791-KIT78-R 3790-KIT50-R 3792-KIT104-R,
3792-KIT104-R/F 3791-KIT78-R 3791-KIT78-R 3790-KIT50-R 3790-KIT50-R 3791-KIT78-R 3790-KIT50-R 3790-KIT50-R
Tools 3791-CIT 3791-CIT 3791-CIT 3791-CIT 3791-CIT
Series 3700 Plug-in Cards for Series 3700 Mainframes
SWITCHING AND CONTROL
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4
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Dual 1×30 multiplexer card
• 60 two-pole channels or 30
four-pole channels for general
purpose switching
• Automatic CJC for temperature
measurements when used with
3720-ST accessory
• Analog backplane connection
relays provide easy bank and
card interconnections
• 300V, 1A switched or 2A carry
signal capacity; 60W, 125VA
• Screw terminal connections
provided with removable
3720-ST accessory
• Relay closures stored in
onboard memory
• Latching electromechanical
relays The Model 3720 offers two independent banks of 1×30 two-pole multiplexers. It is ideal for general
purpose switching, including temperature measurements. The two banks can automatically be
connected to the Series 3700 mainframe backplane and optional DMM through the analog backplane
connection relays. This connection allows the mainframe to reconfigure the card to a single 1×60
two-pole multiplexer or to enable card-to-card expansion for even larger configurations.
Other features of the Model 3720 include its ability to be reconfigured to coordinated four-pole
operation for additional measurement flexibility. Furthermore, the Model 3720 supports thermo-
couple-type temperature measurements when used with the Model 3720-ST (screw terminal)
accessory providing automatic cold junction compensation (CJC).
The Model 3720 uses two 78-pin male D-sub connectors for signal connections. For screw terminal
or automatic CJC, use the detachable Model 3720-ST accessory.
Ordering Information
3720 Dual 1×30
Multiplexer Card
ACCESSORIES AVAILABLE
3720-MTC-1.5 78 Pin D-sub Female to Male Cable, 1.5m (5 ft.)
3720-MTC-3 78 Pin D-sub Female to Male Cable, 3m (10 ft.)
3720-ST Screw Terminal Block (required for auto CJC
thermocouple measurements)
3791-CIT Contact Insertion and Extraction Tool
3791-KIT78-R 78 Pin Female D-sub Connector Kit (contains
2 female D-sub connectors and 156 solder-cup
contacts)
7401 Type K Thermocouple Wire (100 ft.)
3720
Dual 1×30 Multiplexer Card
60 differential channels, automatic CJC w/3720-ST accessory
SERVICES AVAILABLE
3720-3Y-EW-STD 1-year factory warranty extended to 3 years
from date of shipment
3720-5Y-EW-STD 1-year factory warranty extended to 5 years
from date of shipment
C/3720-3Y-STD 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
Side Text
SWITCHING AND CONTROL
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5
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3720 specifications
MULTIPLEXER CONFIGURATION: Two independent 1×30 2-pole multiplexers. Banks can be
isolated from the backplane by relays. Card can be configured for 2 and 4 wire.
CONTACT CONFIGURATION: 2 pole form A.
CONNECTOR TYPE: Two 78 pin male D-shells.
MODEL 3720-ST SCREW TERMINAL OPTION: #22 AWG typical wire size with 0.062 inch O.D.
124 conductors maximum. #16 AWG maximum wire size with 0.092 inch O.D. 36 conductors
per card maximum.
MAXIMUM SIGNAL LEVEL: Channels 1–60: 300V DC or RMS, 1A switched (2A carry), 60W, 125VA.
COMMON MODE VOLTAGE: 300V DC or RMS between any terminal and chassis.
VOLT-HERTZ LIMIT: 8×107.
CONTACT LIFE: >105 operations at maximum signal level. >108 operations no load.1
Dual 1×30 3 Single 1×60 2, 3
Channel Resistance (end of contact life) <1.0
W
<1.5
W
Contact Potential (differential) <±1 μV <± 3 μV
Offset Current <±250 pA <±250 pA
Isolation
Differential 109
W
, 250 pF 109
W
, 450 pF
Bank-Bank 1010
W
, 75 pF —
Channel-channel 109
W
, 75 pF 109
W
, 75 pF
Common Mode 109
W
, 200 pF 109
W
, 400 pF
Crosstalk Channel-channel
300kHz <–60 dB <–55 dB
1MHz <–50 dB <–50 dB
20MHz: <–25 dB <–20 dB
Bandwidth 30 MHz 10 MHz
TYPICAL SCANNING SPEEDS:
Switch Only 4: Sequential scanning, single channel, immediate trigger advance: >120 ch/s.
With Measurements Into Memory 5:
DCV (10V range) or 2W Ohms (1k
W
range): >110 ch/s.
Thermocouple: >110 ch/s.
3- or 4-Wire RTD: >100 ch/s.
4-Wire Ohms (1k
W
range): >100 ch/s.
ACV (10V range): >110 ch/s.
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Output 1
HI
LO
Channel 1
HI
LO
Channel 30
Channels 2–29
Multiplexer Bank 1
Analog
Backplane 1
(DMM Input)
Analog
Backplane 2
(DMM Sense)
Analog
Backplane 3
Analog
Backplane 4
Analog
Backplane 5
Analog
Backplane 6
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Output 2
HI
LO
Channel 31
HI
LO
Channel 60
Channels 32–59
Multiplexer Bank 2
Analog
Backplane 1
(DMM Input)
Analog
Backplane 2
(DMM Sense)
Analog
Backplane 3
Analog
Backplane 4
Analog
Backplane 5
Analog
Backplane 6
To Series 3700 Mainframe Analog Backplane
GENERAL
ACTUATION TIME: 4ms.
TEMPERATURE ACCURACY using Automatic CJC with 3720-ST accessory: 1°C for J, K, T
and E types (see mainframe specification for details).
RELAY TYPE: Latching electromechanical.
RELAY DRIVE SCHEME: Matrix.
INTERLOCK: Backplane relays disabled when interlock connection is removed.
OPERATING ENVIRONMENT: Specified for 0° to 50°C. Specified to 70% R.H. at 35°C.
STORAGE ENVIRONMENT: –25° to 65°C.
WEIGHT: 2.5 lbs.
SAFETY: Conforms to European Union Directive 73/23/EEC, EN61010-1.
EMC: Conforms to European Union Directive 2004/108/EC, EN61326-1.
NOTES
1. Open detector enabled during thermocouple measurements. Minimum signal level 10mV, 10μA.
2. 3706 mainframe with all DMM backplane relays disconnected. Maximum two card backplane relays closed.
3. Connections made using 3720-ST accessory.
4. Scanning script local to 3706 mainframe, within same bank, and break before make switching.
5. 3706 mainframe with autorange off, limits off, dmm.autozero=0, dmm.autodelay=0, 4½ digits (NPLC=0.006),
for ACV dmm.detectorbandwidth=300, for OHMs dmm.offsetcompensation=off, dmm.opendetector=off.
Scanning script local to mainframe, sequential scan within same bank (2 pole) or card (4 pole), and break
before make switching.
3720 Dual 1×30 Multiplexer Card
60 differential channels, automatic CJC w/3720-ST accessory
100% duty
50% duty
25% duty
10% duty
5% duty
1 shot
20
10
1
0.1 1 10 100
Pulse Width (ms)
1. Model 3706 ambient temperature <28°C.
2. One shot repetition rate > 10 seconds.
3. Signal path routed only through one card (not through backplane).
4. Only one channel closed at a time.
5. Contact life specification unaffected if pulse width and carry current are not exceeded.
Maximum Carrying Current (A)
Maximum Carrying Current for Pulses
1000 10000
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A G R E A T E R M E A S U R E O F C O N F I D E N C E
Dual 1×20 multiplexer card
• 40 two-pole or 20 four-pole
channels for general purpose
switching
• 2 dedicated channels for
current measurements, 3A
capacity
• Automatic CJC for temperature
measurements when used with
3721-ST accessory
• 4-wire common side ohms input
supports 40 channels of 4-wire
ohms measurements
• Analog backplane connection
relays provide easy bank and
card interconnections
• 300V, 2A switched or 3A carry
signal capacity; 60W, 125VA
• Latching electromechanical
relays The Model 3721 offers two independent banks of 1×20 two-pole multiplexers that are ideal
for general purpose switching, including temperature measurements. The two banks can
automatically be connected to the Series 3700 mainframe backplane and optional DMM through
the analog backplane connection relays. This connection allows the mainframe to reconfigure the
Model 3721 as a single 1×40 two-pole multiplexer or to enable card-to-card expansion for even
larger configurations.
The Model 3721 provides a number of other features. In addition to the 40 channels, two fused
channels are supplied for current measurements. Also, the Model 3721 includes dedicated inputs
that enable 40 channels of four-wire common side ohms measurements. For thermocouple type
measurements, automatic cold junction compensation (CJC) is supported when used with the Model
3721-ST (screw terminal) accessory.
The Model 3721 uses two 50-pin male D-sub connectors for signal connections. For screw terminal or
automatic CJC, use the detachable Model 3721-ST accessory.
Ordering Information
3721 Dual 1×20
Multiplexer Card
ACCESSORIES AVAILABLE
3721-MTC-1.5 50 Pin D-sub Female to Male Cable, 1.5m (5 ft.)
3721-MTC-3 50 Pin D-sub Female to Male Cable, 3m (10 ft.)
3721-ST Screw Terminal Block (required for auto CJC
thermocouple measurements)
3790-KIT50-R 50 Pin Female D-sub Connector Kit (contains
2 female D-sub connectors and 100 solder-cup
contacts)
7401 Type K Thermocouple Wire (100 ft.)
3721
Dual 1×20 Multiplexer Card
40 differential channels, automatic CJC w/3721-ST accessory
SERVICES AVAILABLE
3721-3Y-EW-STD 1-year factory warranty extended to 3 years
from date of shipment
3721-5Y-EW-STD 1-year factory warranty extended to 5 years
from date of shipment
C/3721-3Y-STD 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
Side Text
SWITCHING AND CONTROL
1.888.KEITHLEY (U.S. only)
www.keithley.com
7
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3721 specifications
MULTIPLEXER CONFIGURATION: Two independent 1×20
2-pole multiplexers. Banks can be connected together via
relay creating a single 1×40 multiplexer. Banks can be iso-
lated from the backplane by relays. Card can be configured
for common side Ohms measurement via backplane relays.
Channel 41–42: Multiplex one of two 2-pole current signals
into DMM.
CONTACT CONFIGURATION: 2 pole form A.
CONNECTOR TYPE: Two 50 pin male D-shells. Removable
screw terminal option.
MAXIMUM SIGNAL LEVEL: Channels 1–40: 300V DC or RMS,
2A switched (3A carry), 60W, 125VA maximum. Channels
41–42: 60V DC or 30V RMS, 3A switched, 60W, 125VA maxi-
mum. Fused 3A, 250V RMS.
COMMON MODE VOLTAGE: Channels 1–40: 300V DC or RMS
between any terminal and chassis.
VOLT-HERTZ LIMIT: 8×107.
CONTACT LIFE: >105 operations at maximum signal level. >108
operations no load.1
TYPICAL SCANNING SPEEDS:
Switch Only 4: Sequential scanning, single channel, immedi-
ate trigger advance: >120 ch/s.
With Measurements Into Memory 5:
DCV (10V range) or 2W Ohms (1k
W
range): >110 ch/s
Thermocouple: >110 ch/s.
3- or 4-Wire RTD: >100 ch/s.
4-Wire Ohms (1k
W
range): >100 ch/s.
ACV (10V, 400Hz range) or ACI (1A, 400Hz range): >110 ch/s.
Dual
1×20 3
Single
1×40 2, 3
Channel Resistance
(end of contact life) <1.0
W
<1.5
W
Contact Potential
(differential) <±1 μV <±3 μV
Offset Current <±250 pA <±250 pA
Isolation
Differential 109
W
, 280 pF 109
W
, 530 pF
Bank-Bank 1011
W
, 60 pF —
Channel-channel 109
W
, 50 pF 109
W
, 50 pF
Common Mode 109
W
, 180 pF 109
W
, 480 pF
Crosstalk Channel-channel
300kHz <–60 dB <–60 dB
1MHz <–50 dB <–50 dB
20MHz: <–25 dB <–15 dB
Bandwidth 28 MHz 9 MHz
GENERAL
ACTUATION TIME: 4ms.
TEMPERATURE ACCURACY using Automatic CJC with
3721-ST accessory: 1°C for J, K, T, and E types (see
mainframe specification for details).
RELAY TYPE: Latching electromechanical.
RELAY DRIVE SCHEME: Direct.
INTERLOCK: Backplane relays disabled when interlock
connection is removed.
OPERATING ENVIRONMENT: Specified for 0° to 50°C.
Specified to 70% R.H. at 35°C.
STORAGE ENVIRONMENT: –25° to 65°C.
WEIGHT: 2.25 lbs.
SAFETY: Conforms to European Union Directive
73/23/EEC, EN61010-1.
EMC: Conforms to European Union Directive
2004/108/EC, EN61326-1.
NOTES
1. Open detector enabled during thermocouple measurements. Minimum
signal level 10mV, 10μA.
2. 3706 mainframe with all DMM backplane relays disconnected.
Maximum two card backplane relays closed.
3. Connections made using 3721-ST accessory.
4. Scanning script local to 3706 mainframe, within same bank, and break
before make switching.
5. 3706 mainframe with autorange off, limits off, dmm.autozero=0,
dmm.autodelay=0, 4½ digits (NPLC=0.006), for ACV dmm.detec-
torbandwidth=300, for OHMs dmm.offsetcompensation=off, dmm.
opendetector=off. Scanning script local to mainframe, sequential scan
within same bank (2 pole) or card (4 pole), and break before make
switching.
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Output 1
HI
LO
Channel 1
HI
LO
Channel 20
Channels 2–19
Multiplexer Bank 1
Analog
Backplane 1
(DMM Input)
Analog
Backplane 2
(DMM Sense)
Analog
Backplane 3
Analog
Backplane 4
Analog
Backplane 5
Analog
Backplane 6
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Output 2
HI
LO
Channel 21
HI
LO
Channel 40
Channels 22–39
Multiplexer Bank 2
Analog
Backplane 1
(DMM Input)
Analog
Backplane 2
(DMM Sense)
Analog
Backplane 3
Analog
Backplane 4
Analog
Backplane 5
Analog
Backplane 6
To Series 3700 Mainframe Analog Backplane
HI
LO
Channel 41
3A
HI
LO
Channel 42
3A
Amps
Analog
Backplane 1
(DMM Input LO)
LO
LO Sense
HI
LO
Channel 1
HI
LO
Channel 20
Channels 2–19
Multiplexer Bank 1
DMM
To Series 3700 Mainframe Analog Backplane
4 Wire
Common Side
Ohms
LO
LO Sense
HI
LO
Channel 21
HI
LO
Channel 40
Channels 22–39
Multiplexer Bank 2
DMM
HI
HI Sense
HI
HI Sense
Common DMM
Two pole mode
Four-wire common side ohm mode
3721 Dual 1×20 Multiplexer Card
40 differential channels, automatic CJC w/3721-ST accessory
100% duty
50% duty
25% duty
10% duty
5% duty
1 shot
20
10
1
0.1 1 10 100
Pulse Width (ms)
1. Model 3706 ambient temperature <28°C.
2. One shot repetition rate > 10 seconds.
3. Signal path routed only through one card (not through backplane).
4. Only one channel closed at a time.
5. Contact life specification unaffected if pulse width and carry current are not exceeded.
Maximum Carrying Current (A)
Maximum Carrying Current for Pulses
1000 10000
SWITCHING AND CONTROL
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8
A G R E A T E R M E A S U R E O F C O N F I D E N C E
High density dual 1×48 multiplexer card
• 96 two-pole or 48 four-pole
channels for general purpose
measurements
• Analog backplane connection
relays provide easy bank and
card interconnections
• 300V, 1A switched or 2A carry
signal capacity; 60W, 125VA
• 1µV and 100pA offsets
• 25MHz bandwidth
• Relay closures stored in
onboard memory
• Latching electromechanical
relays
• Scan and measure over 110
channels/second
The Model 3722 offers two independent banks of 1×48 two-pole multiplexers, which is ideal for
applications that require a high channel count. The two banks can automatically be connected to
the Series 3700 mainframe backplane and optional DMM through the analog backplane connection
relays. This connection allows the mainframe to reconfigure the card as a single 1×96 two-pole
multiplexer or to enable card-to-card expansion for even larger configurations. Another feature
of this card is the latching electromechanical relays. They can accommodate 300V, 1A switched
signal levels.
The Model 3722 uses two 104-pin D-sub connectors for signal connections. A solder style connector
kit (Model 3792-KIT104-R) and pre-assembled cables (Model 3722-MTC-1.5 and 3722-MTC-3) are
available for card connections.
Ordering Information
3722 Dual 1×48, High
Density, Multiplexer
Card
ACCESSORIES AVAILABLE
3722-MTC-1.5
104-pin D-sub Male to Female Cable, 1.5m (5 ft.)
3722-MTC-1.5/MM
104-pin D-sub Male to Male Cable, 1.5m (5 ft.)
3722-MTC-3 104-pin D-sub Male to Female Cable, 3m (10 ft.)
3722-MTC-3/MM 104-pin D-sub Male to Male Cable, 3m (10 ft.)
3791-CIT Contact Insertion and Extraction Tool
3792-KIT104-R 104-pin Male D-sub Connector kit (contains 2
male D-sub connectors with housings and 208
solder-cup contacts)
3792-KIT104-R/F 104-pin Female D-sub Connector kit (contains
2 female D-sub connectors with housings and
208 solder-cup contacts)
3722
Dual 1×48, High Density, Multiplexer Card
96 differential channels, 300 Volts/1 Amp
SERVICES AVAILABLE
3722-3Y-EW-STD 1-year factory warranty extended to 3 years
from date of shipment
3722-5Y-EW-STD 1-year factory warranty extended to 5 years
from date of shipment
C/3722-3Y-STD 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
Side Text
SWITCHING AND CONTROL
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www.keithley.com
9
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3722 specifications
MULTIPLEXER CONFIGURATION: Two independent 1×48 2-pole multiplexers. Banks can be
connected together via relays creating a single 1×96 multiplexer. Banks can be isolated from the
backplane by relays. Card can be configured for 2- and 4-wire mode.
CONTACT CONFIGURATION: 2 pole form A.
CONNECTOR TYPE: Two 104 pin female D-shells.
MAXIMUM SIGNAL LEVEL: 300V DC or RMS, 1A switched (2A carry), 60W, 125VA.
COMMON MODE VOLTAGE: 300V DC or RMS between any terminal and chassis.
VOLT-HERTZ LIMIT: 8×107.
CONTACT LIFE: >105 operations at maximum signal level. >108 operations no load.1
Dual 1×48 2 Single 1×96
Channel Resistance (end of contact life) <1.5
W
<2.5
W
Contact Potential (differential) <±1 μV <± 2 μV
Offset Current <100 pA <100 pA
Isolation
Differential 5×109
W
, 200 pF 5×109
W
, 400 pF
Bank-Bank 109
W
, 50 pF —
Channel-channel 109
W
, 50 pF 109
W
, 50 pF
Common Mode 1010
W
, 200 pF 1010
W
, 400 pF
Crosstalk Channel-channel
300kHz <–65 dB <–65 dB
1MHz <–55 dB <–55 dB
20MHz <–30 dB <–30 dB
Bandwidth 25 MHz 15 MHz
TYPICAL SCANNING SPEEDS:
Switch Only 3: Sequential scanning, single channel, immediate trigger advance: >120 ch/s.
With Measurements Into Memory 4:
DCV (10V range) or 2W Ohms (1k
W
range): >110 ch/s.
3- or 4-Wire RTD: >100 ch/s.
4-Wire Ohms (1k
W
range): >100 ch/s.
ACV (10V, 400Hz range): >110 ch/s.
GENERAL
ACTUATION TIME: 4ms.
RELAY TYPE: Latching electromechanical.
RELAY DRIVE SCHEME: Matrix.
OPERATING ENVIRONMENT: Specified for 0° to 50°C. Specified to 70% R.H. at 35°C.
STORAGE ENVIRONMENT: –25° to 65°C.
WEIGHT: 2.5 lbs.
SAFETY: Conforms to European Union Directive 73/23/EEC, EN61010-1.
EMC: Conforms to European Union Directive 2004/108/EC, EN61326-1.
NOTES
1. Minimum signal level 10mV, 10μA.
2. 3706 mainframe with all DMM backplane relays disconnected. Maximum two card backplane relays closed.
3. Scanning script local to 3706 mainframe, within same bank, and break before make switching.
4. 3706 mainframe with autorange off, limits off, dmm.autozero=0, dmm.autodelay=0, 4½ digits (NPLC=.006),
for ACV dmm.detectorbandwidth=300, for OHMs dmm.offsetcompensation=off. Scanning script local to main-
frame, sequential scan within same bank (2 pole) or card (4 pole), and break before make switching.
3722 Dual 1×48, High Density, Multiplexer Card
96 differential channels, 300 Volts/1 Amp
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10
A G R E A T E R M E A S U R E O F C O N F I D E N C E
High speed, dual 1×30 multiplexer card
• 60 two-pole or 30 four-pole
channels for high speed
scanning
• 120 channel single-pole mode
for one-wire (common side)
measurements
• Analog backplane connection
relays provide easy bank and
card interconnections
• 200V, 1A switched or 1.25A
carry signal capacity; 15W
• Relay actuation time <0.5ms
• 20MHz bandwidth
• Ideal for multi-channel I-V
testing with Model 2600
SourceMeter® instruments
• Long life dry reed relays
(>109 operations)
The Model 3723 offers two independent banks of high speed 1×30 two-pole multiplexers that are
ideal for high speed scanning applications. The two banks can automatically be connected to the
Series 3700 mainframe backplane and optional DMM through the analog backplane connection
relays. This connection allows the mainframe to reconfigure the Model 3723 as a single 1×60 two-
pole multiplexer or as a single 1×120 single-pole multiplexer. It also enables card-to-card expansion
for even larger configurations.
By using high speed reed relays with actuation times of less than 0.5ms, this card can meet
demanding throughput applications. Another feature of the Model 3723 is its single-ended, one-pole
mode, which supports up to 120 channels of single-wire measurements.
The Model 3723 uses two 78-pin D-sub connectors for signal connections. For screw terminal
connections, use the Model 3723-ST for two- and four-pole configurations or the Model 3723-ST-1 for
single-wire applications.
Ordering Information
3723 Dual 1×30, High
Speed, Reed Relay,
Multiplexer Card
ACCESSORIES AVAILABLE
3720-MTC-1.5 78 Pin D-sub Female to Male Cable, 1.5m (5 ft.)
3720-MTC-3 78 Pin D-sub Female to Male Cable, 3m (10 ft.)
3723-ST Screw Terminal Block
3723-ST-1 Screw Terminal Block for single-pole
applications
3791-CIT Contact Insertion and Extraction Tool
3791-KIT78-R 78 Pin Female D-sub Connector Kit (contains
2 female D-sub connectors and 156 solder-cup
contacts)
3723
Dual 1×30, High Speed, Multiplexer Card
60 differential channels, long life reed relays
SERVICES AVAILABLE
3723-3Y-EW-STD 1-year factory warranty extended to 3 years
from date of shipment
3723-5Y-EW-STD 1-year factory warranty extended to 5 years
from date of shipment
C/3723-3Y-STD 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
Side Text
SWITCHING AND CONTROL
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11
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3723 specifications
MULTIPLEXER CONFIGURATION: Two independent 1×30 2-pole multiplexers. Banks can be
connected together via relay creating a single 1×60 multiplexer. Banks can be isolated from the
backplane by relays. Card can be configured for 1-, 2-, and 4-wire.
CONTACT CONFIGURATION: 2 pole form A.
CONNECTOR TYPE: Two 78-pin male D-shells.
MODEL 3723-ST SCREW TERMINAL OPTION: #22 AWG typical wire size with 0.062 inch O.D.
124 conductors maximum. #16 AWG maximum wire size with 0.092 inch O.D. 36 conductor per
card maximum.
MAXIMUM SIGNAL LEVEL: 200V DC or RMS, 1A switched (1.25A carry), 15W.
COMMON MODE VOLTAGE: 300V DC or RMS between any terminal and chassis.
VOLT-HERTZ LIMIT: 8×107.
CONTACT LIFE: Reed: >109 operations, no load. 107 operations @100V, 10mA.
EMR: >108 operations @ 5V, 10mA. 105 operations @ maximuum signal level.
Dual 1×30 1 Single 1×60 1, 2
Channel Resistance (end of contact life) <1.5
W
<2.0
W
Contact Potential: Differential
Single-Ended
<±6 μV
<±12 μV
<±6 μV
<±12 μV
Offset Current <250 pA <250 pA
Isolation
Differential 1010
W
, 260 pF 1010
W
, 500 pF
Bank-Bank 1010
W
, 75 pF —
Channel-channel 1010
W
, 75 pF 1010
W
, 75 pF
Common Mode 1010
W
, 280 pF 109
W
, 625 pF
Crosstalk Channel-channel
300kHz <–55 dB <–55 dB
1MHz <–50 dB <–45 dB
20MHz <–20 dB <–20 dB
Bandwidth 20 MHz 10 MHz
TYPICAL SCANNING SPEEDS:
Switch Only 3: Sequential scanning, single channel, immediate trigger advance: >1000 ch/s.
With Measurements Into Memory 4:
DCV (10V range) or 2W Ohms (1k
W
range): >800 ch/s.
3- or 4-Wire RTD: >450 ch/s.
4-Wire Ohms (1k
W
range): >450 ch/s.
ACV (10V, 400Hz range): >800 ch/s.
GENERAL
ACTUATION TIME: <0.5ms.
RELAY TYPE: Dry reed.
RELAY DRIVE SCHEME: Direct.
RELAY DRIVE CURRENT: 10mA.
INTERLOCK: Backplane relays disabled when interlock connection is removed.
OPERATING ENVIRONMENT: Specified for 0° to 50°C. Specified to 70% R.H. at 35°C.
STORAGE ENVIRONMENT: –25° to 65°C.
WEIGHT: 3.0 lbs.
SAFETY: Conforms to European Union Directive 73/23/EEC, EN61010-1.
EMC: Conforms to European Union Directive 2004/108/EC, EN61326-1.
NOTES
1. Connections made using 3723-ST accessory.
2. 3706 mainframe with all DMM backplane relays disconnected. Maximum two card backplane relays closed.
3. Scanning script local to 3706 mainframe, within same bank, and break before make switching.
4. 3706 mainframe with autorange off, limits off, dmm.autozero=0, dmm.autodelay=0, 4½ digits (NPLC=0.006),
for ACV dmm.detectorbandwidth=300, for OHMs dmm.offsetcompensation=off. Scanning script local to main-
frame, sequential scan within same bank (2 pole) or card (4 pole), and break before make switching.
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Output 1
HI
LO
Channel 1
HI
LO
Channel 30
Channels 2–29
Multiplexer Bank 1
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Output 2
HI
LO
Channel 31
HI
LO
Channel 60
Channels 32–59
Multiplexer Bank 2
To Series 3700 Mainframe Analog Backplane
Analog Backplane 1
(DMM Input)
Analog Backplane 2
(DMM Sense)
Analog Backplane 3
Analog Backplane 4
Analog Backplane 5
Analog Backplane 6
Analog Backplane 1
(DMM Input)
Analog Backplane 2
(DMM Sense)
Analog Backplane 3
Analog Backplane 4
Analog Backplane 5
Analog Backplane 6
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
To Series 3700 Mainframe Analog Backplane
Output 1
Multiplexer Bank 1
HI
LO
Analog Backplane 1
(DMM Input)
Analog Backplane 2
(DMM Sense)
Analog Backplane 3
Analog Backplane 4
Analog Backplane 5
Analog Backplane 6
Channel 30
Single Pole
Configuration Relay
(internal control only)
Channels 2–29
Channel 1
Channel 31
Channel 61
Channel 90
Channels 62–89
Output 2
Multiplexer Bank 2
HI
LO
Analog Backplane 1
(DMM Input)
Analog Backplane 2
(DMM Sense)
Analog Backplane 3
Analog Backplane 4
Analog Backplane 5
Analog Backplane 6
Channel 60
Single Pole
Configuration Relay
(internal control only)
Channels 32–59
Channel 91
Channel 120
Channels 92–119
Two-pole mode
Single-pole mode
3723 Dual 1×30, High Speed, Multiplexer Card
60 differential channels, long life reed relays
SWITCHING AND CONTROL
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12
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Dual 1×30 FET multiplexer card
3724
Dual 1×30 FET Multiplexer Card
60 differential channels, automatic CJC with 3724-ST accessory
The Model 3724 provides two independent banks of solid-state relays arranged as 1×30 two-pole
multiplexers that are ideal for high reliability, high speed multipoint measurement applications
including temperature. The two banks can automatically be connected to the Series 3700 mainframe
backplane and optional DMM through the analog backplane connection relays. This connection
allows the mainframe to reconfigure the card to a single 1×60 two-pole multiplexer or to enable
card-to-card expansion for even larger configurations.
The solid-state FET relay technology supports fast switching times with scanning rates of greater
than 1250 channels/second and provides unlimited contact life. In addition, the Model 3724 supports
thermo couple temperature measurements when used with the Model 3724-ST (screw terminal)
accessory providing automatic cold junction compensation (CJC).
The Model 3724 uses two 78-pin male D-sub connectors for signal connections. For screw terminal
or automatic CJC, use the detachable Model 3724-ST accessory.
• 60 two-pole or 30 four-pole
solid-state channels
• Scanning speeds greater
than 1250 channels/second
(switch only)
• Optically isolated, solid-state
FET relays provide unlimited
contact life
• 200V, 0.1A switch/carry signal
capacity; 800mW
• Automatic CJC for temperature
measurements when used with
3724-ST accessory
• Analog backplane connection
relays provide easy bank and
card interconnections
• Screw terminal connections
provided with removable
3724-ST accessory
• Ideal for maintenance-free,
long-life thermocouple
temperature measurements
Ordering Information
3724 Dual 1×30 FET
Multiplexer Card
ACCESSORIES AVAILABLE
3720-MTC-1.5 78-pin female-to-male D-sub Cable Assembly,
1.5m (4.9 ft)
3720-MTC-3 78-pin female-to-male D-sub Cable Assembly,
3m (9.8 ft)
3724-ST Screw Terminal Block (required for auto CJC
thermocouple measurements)
3791-CIT Contact Insertion and Extraction Tool
3791-KIT78-R 78-pin female D-sub Connector Kit (contains
2 female D-sub connectors and 156 solder-cup
contacts)
SERVICES AVAILABLE
3724-3Y-EW 1-year factory warranty extended to 3 years
from date of shipment
C/3724-3Y-DATA 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
Side Text
SWITCHING AND CONTROL
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www.keithley.com
13
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3724 specifications
Model 3724 Specifications
MULTIPLEXER CONFIGURATION: Two independent 1×30, 2-pole multiplexers. Banks can be
connected together via relay creating a single 1×60 multiplexer. Banks can be isolated from the
backplane by relays. Card can be configured for 2- and 4-wire.
CONTACT CONFIGURATION: 2-pole form A.
CONNECTOR TYPE: Two 78-pin male D-shells.
MODEL 3724-ST SCREW TERMINAL OPTION: #22AWG typical wire size with 0.062 inch O.D.
124 conductors maximum. 16 AWG maximum wire size with 0.092 inch O.D. 36 conductor per
card maximum.
MAXIMUM SIGNAL LEVEL: 200V DC or 141V RMS between any terminal, 0.1A switched (0.1A
carry), 800mW.
COMMON MODE VOLTAGE: 300V DC or RMS between any terminal and chassis.
VOLT-HERTZ LIMIT: 107.
CONTACT LIFE:
Solid State: > unlimited.
EMR (Backplane): >1×108 operations @ 5V, 10mA.
1×105 operations @ max. signal level.
Dual 1×301Single 1×601, 2
Channel Resistance <62W (54W @ 23ºC) <64W (58W @ 23ºC)
Contact Potential (differential) <±2 μV <±2.5 μV
Offset Current
<10 nA
(<±100 pA @
23ºC/60% R.H.)
<10 nA
(<±100 pA @
23ºC/60% R.H.)
Isolation
Differential 109W, 500 pF 109W, 1100 pF
Bank-Bank 109W, 100 pF —
CH–CH 109W, 125 pF 109W, 125 pF
Common Mode 109W, 150 pF 109W, 700 pF
Crosstalk CH-CH
300 kHz –40 dB –40 dB
1 MHz –30 dB –30 dB
Bandwidth 2 MHz 1 MHz
NOTES
1. Connections made using 3724-ST.
2. 3706 mainframe with all DMM backplane relays disconnected. Maximum two card backplane relays closed.
3724 Dual 1×30 FET Multiplexer Card
60 differential channels, automatic CJC with 3724-ST accessory
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Output 1
HI
LO
Channel 1
HI
LO
Channel 30
Channels 2–29
Multiplexer Bank 1
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Output 2
HI
LO
Channel 31
HI
LO
Channel 60
Channels 32–59
Multiplexer Bank 2
To Series 3700 Mainframe Analog Backplane
Analog Backplane 1
(DMM Input)
Analog Backplane 2
(DMM Sense)
Analog Backplane 3
Analog Backplane 4
Analog Backplane 5
Analog Backplane 6
Analog Backplane 1
(DMM Input)
Analog Backplane 2
(DMM Sense)
Analog Backplane 3
Analog Backplane 4
Analog Backplane 5
Analog Backplane 6
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A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3724 specifications
3724 Dual 1×30 FET Multiplexer Card
60 differential channels, automatic CJC with 3724-ST accessory
3724 Card/3706 Multimeter
Condensed Specifications
Note: For complete 3724 Card and 3706 Multimeter specifications, please refer to Keithley website
(www.keithley.com) document Model 3706 Multimeter/Data Acquisition System Specifications,
Revision B or higher.
TEMPERATURE
Displayed in °C, °F, or K. Exclusive of probe errors.
THERMOCOUPLES (accuracy based on ITS-90)
Type Range Resolution
90 Day/1 Year
23°C ± 5°
J –150 to +760°C 0.001°C 1.0°C
K –150 to +1372°C 0.001°C 1.0°C
N –100 to +1300°C 0.001°C 1.0°C
T –100 to +400°C 0.001°C 1.0°C
E –150 to +1000°C 0.001°C 1.0°C
R +400 to +1768°C 0.1°C 1.8°C
S +400 to +1768°C 0.1°C 1.8°C
B +1100 to +1820°C 0.1°C 1.8°C
DC SPECIFICATIONS
3724 CARD/3706 MULTIMETER UNCERTAINTY SPECIFICATIONS:
Function Range Notes
Voltage All Add 4.5 μV to PPM “of range”
Resistance 100 kWAdd 8 PPM to “of reading”
Resistance 1 MWAdd 80 PPM to “of reading”
Resistance 10 MWAdd 250 PPM to “of reading”
Resistance 100 MWAdd 5000 PPM to “of reading”
Resistance 2-wire 1 kW through 100 MWAdd 1.2 W (with REL) to PPM “of range” Add 64W
(without REL) to PPM “of range”
Resistance 4-wire
and Dry Circuit 1 W, 10 W, and 100 W
Ranges Not Available (maximum lead resistance
exceeded, see manual for measurement
considerations)
CONDITIONS: 1 PLC or 5 PLC.
ACCURACY: ±(ppm of reading + ppm of range) (ppm = parts per million; e.g., 10ppm = 0.001%).
GENERAL
ACTUATION TIME: <0.2ms.
TEMPERATURE ACCURACY USING AUTOMATIC CJC WITH 3724-ST ACCESSORY: 1ºC for
J, K, T, and E type (see mainframe specification for details).
RELAY TYPE: Optically isolated FET.
RELAY DRIVE SCHEME: Direct.
INTERLOCK: Backplane relays disabled when interlock connection removed.
RELAY DRIVE CURRENT: 4mA.
OPERATING ENVIRONMENT: Specified for 0ºC to 50ºC. Specified to 70% R.H. at 35ºC.
STORAGE ENVIRONMENT: –25ºC to 65ºC.
WEIGHT: 1.13 kg (2.5 lbs.).
FIRMWARE: Requires main revision to be 1.20 or above. (Applies to all Series 3700 main-
frames.)
SAFETY: Conforms to European Union Directive 73/23/EEC, EN61010-1.
EMC: Conforms to European Union Directive 2004/108/EC, EN61326-1.
TYPICAL SCANNING SPEEDS, SWITCH ONLY1:
Sequential scanning, single channel, immediate trigger advance: >1250 ch/s.
TYPICAL SCANNING SPEEDS, WITH MEASUREMENTS INTO MEMORY2:
DCV (10V range) or 2WW (1kW range): >1000 ch/s.
Thermocouple: >1000 ch/s.
3- or 4-Wire RTD: >450 ch/s.
4-Wire W (1kW range): >450 ch/s.
ACV (10V, 400Hz range): >1000 ch/s.
POWER BUDGET INFORMATION:
Quiescent Power (mW): 1150.
Channel Relay Power (mW) Each: 20.
Backplane Relay Power Consumption (mW) Each: 100.
See Chapter 8 of the Series 3700 user’s manual for more detailed information.
NOTES
1. Scanning script local to mainframe, within same bank, break before make.
2. 3706 mainframe with autorange off, limits off, dmm.autodelay=0, dmm.autozero=0, 4½ digits (NPLC=.006), for
ACV dmm.detectorbandwidth=300, for OHMs dmm.offsetcompensation=off, dmm.opendetector=off. Scanning
script local to mainframe, sequential scan within same bank (2 pole) or card (4 pole), and break before make
switching.
SWITCHING AND CONTROL
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15
A G R E A T E R M E A S U R E O F C O N F I D E N C E
High density 6×16 matrix card
• 6 row by 16 column matrix
(2-pole)
• Analog backplane connection
relays provide easy column
expansion
• 300V, 1A switched or 2A carry
signal capacity; 60W, 125VA
• Screw terminal connections
provided on removable 3730-ST
accessory
• 2µV and 100pA offsets
• Relay closures stored in
onboard memory
• Latching electromechanical
relays
The Model 3730 is a two-pole, 6 row by 16 column matrix card. It can connect up to six differential
instrument channels to any combination of 16 DUTs (devices under test). Any row can be connected
to the Series 3700 mainframe backplane by using the analog backplane connection relays. This allows
for easy matrix column expansion. A matrix of up to 6 rows by 96 columns can be supported within a
single Model 3706 mainframe (with six Model 3730 cards).
The Model 3730 uses two 50-pin male D-sub connectors for signal connections. For screw terminal
connections, use the detachable Model 3730-ST accessory.
Ordering Information
3730 6×16, High Density,
Matrix Card
ACCESSORIES AVAILABLE
3721-MTC-1.5 50 Pin D-sub Female to Male Cable, 1.5m (5 ft.)
3721-MTC-3 50 Pin D-sub Female to Male Cable, 3m (10 ft.)
3730-ST Screw Terminal Block
3790-KIT50-R 50 Pin Female D-sub Connector Kit (contains
2 female D-sub connectors and 100 solder-cup
contacts)
3730
6×16, High Density, Matrix Card
96 two-pole crosspoints with column expansion relays
SERVICES AVAILABLE
3730-3Y-EW-STD 1-year factory warranty extended to 3 years
from date of shipment
3730-5Y-EW-STD 1-year factory warranty extended to 5 years
from date of shipment
C/3730-3Y-STD 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
Side Text
SWITCHING AND CONTROL
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16
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3730 specifications
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Analog Backplane 1
(DMM Input)
Analog Backplane 2
(DMM Sense)
Analog Backplane 3
Analog Backplane 4
Analog Backplane 5
Analog Backplane 6
16151413121110987654321
1
2
3
4
5
6
Rows
Columns
Matrix Crosspoint
Relay Detail
HI
LO
HI
LO
MATRIX CONFIGURATION: 6 row by 16 column matrix.
Columns can be expanded using the backplane or isolated
by relays.
CONTACT CONFIGURATION: 2 pole form A.
CONNECTOR TYPE: Two 50 pin male D-shells.
MODEL 3730-ST SCREW TERMINAL OPTION: #22 AWG
typical wire size with 0.062 inch O.D. 88 conductors
maximum. #16 AWG maximum wire size with 0.092 inch
O.D. 44 conductor per card maximum.
MAXIMUM SIGNAL LEVEL: 300V DC or RMS, 1A switched (2A
carry), 60W, 125VA.
COMMON MODE VOLTAGE: 300V DC or RMS between any
terminal and chassis.
VOLT-HERTZ LIMIT: 8×107.
CONTACT LIFE: >105 operations @ maximuum signal level.
>108 operations no load.1
6×16 2, 3
Channel Resistance (end of contact life) <1.0
W
Contact Potential (differential) <±2 μV
Offset Current <±100 pA
Isolation
Differential 1010
W
, 250 pF
Channel-channel 1010
W
, 75 pF
Common Mode 1010
W
, 150 pF
Crosstalk Channel-channel
300kHz <–65 dB
1MHz <–55 dB
20MHz <–30 dB
Bandwidth 27 MHz
GENERAL
ACTUATION TIME: 4ms.
RELAY TYPE: Latching electromechanical.
RELAY DRIVE SCHEME: Hybrid Matrix.
INTERLOCK: Backplane relays disabled when terminal
assembly is removed.
OPERATING ENVIRONMENT: Specified for 0° to 50°C.
Specified to 70% R.H. at 35°C.
STORAGE ENVIRONMENT: –25° to 65°C.
WEIGHT: 2.5 lbs.
SAFETY: Conforms to European Union Directive 73/23/
EEC, EN61010-1.
EMC: Conforms to European Union Directive 2004/108/
EC, EN61326-1.
NOTES
1. Minimum signal level 10mV, 10μA.
2. Connections made using 3730-ST accessory.
3. 3706 mainframe with all DMM backplane relays disconnected.
3730 6×16, High Density, Matrix Card
96 two-pole crosspoints with column expansion relays
100% duty
50% duty
25% duty
10% duty
5% duty
1 shot
20
10
1
0.1 1 10 100
Pulse Width (ms)
1. Model 3706 ambient temperature <28°C.
2. One shot repetition rate > 10 seconds.
3. Signal path routed only through one card (not through backplane).
4. Only one channel closed at a time.
5. Contact life specification unaffected if pulse width and carry current are not exceeded.
Maximum Carrying Current (A)
Maximum Carrying Current for Pulses
1000 10000
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A G R E A T E R M E A S U R E O F C O N F I D E N C E
High speed 6×16 reed matrix card
• 6 row by 16 column matrix
(2-pole) using high speed, long
life reed relays
• Analog backplane connection
relays provide easy column
expansion
• 200V, 1A switched or 2A carry
signal capacity; 10W, 10VA
• Screw terminal connections
provided on removable 3731-ST
accessory
• Relay actuation time of 0.5ms
• Ideal for multi-channel I-V
testing with Series 2600A
System SourceMeter®
Instruments
• Long life dry reed relays
(>109 operations) The Model 3731 is a two-pole, 6 row by 16 column reed relay matrix card. By using high speed reed
relays with actuation times of 0.5ms, this card meets the requirements of demanding throughput
applications while offering users the additional benefit of long life, exceeding one billion operations.
The card can connect up to six differential instrument channels to any combination of 16 DUTs
(devices under test). Any row can be connected to the Series 3700 mainframe backplane by using the
analog backplane connection relays. This allows for easy matrix column expansion. A matrix of up to
6 rows by 96 columns can be supported within a single 3706 mainframe (with six Model 3731 cards).
The Model 3731 uses two 50-pin male D-sub connectors for signal connections. For screw terminal
connections, use the detachable Model 3731-ST accessory.
Ordering Information
3731 6×16 High Speed, Reed
Relay, Matrix Card
ACCESSORIES AVAILABLE
3721-MTC-1.5 50-pin D-sub Female to Male Cable, 1.5m (5 ft.)
3721-MTC-3 50-pin D-sub Female to Male Cable, 3m (10 ft.)
3731-ST Screw Terminal Block
3790-KIT50-R 50-pin Female D-sub Connector Kit (contains
2 female D-sub connectors and 100 solder-cup
contacts)
3731
6×16 High Speed, Reed Relay, Matrix Card
96 two-pole crosspoints with column expansion relays
SERVICES AVAILABLE
3731-3Y-EW-STD 1-year factory warranty extended to 3 years
from date of shipment
3731-5Y-EW-STD 1-year factory warranty extended to 5 years
from date of shipment
C/3731-3Y-STD 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
Side Text
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18
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3731 specifications
3731 6×16 High Speed, Reed Relay, Matrix Card
96 two-pole crosspoints with column expansion relays
96 Two-Pole Crosspoints with
Column Expansion Relays
MATRIX CONFIGURATION: 6 row by 16 column matrix.
Columns can be expanded using the backplane or isolated
by relays.
CONTACT CONFIGURATION: 2-pole form A.
CONNECTOR TYPE: Two 50-pin male D-shells.
MODEL 3731-ST SCREW TERMINAL OPTION:
Typical wire size: #22 AWG with .062 inch O.D.;
88 conductors maximum
Maximum wire size: #16 AWG with .092 inch O.D.;
44 conductors per card maximum.
MAXIMUM SIGNAL LEVEL: 200V DC or peak AC, 1A switched
(2A carry), 10W, 10VA.
COMMON MODE VOLTAGE: 200V DC or peak AC between any
signal path to a signal path or ground.
VOLT-HERTZ LIMIT: 8×107.
CONTACT LIFE:
Reed: >109 operations no load. >8×106 operations @ 100V,
10mA.
EMR (Backplane): >108 operations @ 5V, 10mA and 105
operations @ maximum signal level.
6×16 1, 2
Channel Resistance (end of contact life) <1.5
W
Contact Potential (differential) <±80 μV
Offset Current <±500 pA
Isolation
Differential 3×109
W
, 300 pF
Channel-channel 3×109
W
, 100 pF
Common Mode 3×109
W
, 150 pF
Crosstalk Channel-channel
300kHz <–60 dB
1MHz <–50 dB
15MHz <–20 dB
Bandwidth 19 MHz
GENERAL
ACTUATION TIME: 0.5ms.
RELAY TYPE: Reed.
RELAY DRIVE SCHEME: Direct drive.
INTERLOCK: Backplane relays disabled when terminal
assembly is removed.
OPERATING ENVIRONMENT: Specified for 0° to 50°C.
Specified to 70% R.H. at 35°C.
STORAGE ENVIRONMENT: –25° to 65°C.
WEIGHT: 2.2 lbs.
SAFETY: Compliant with European Union Low Voltage
Directive
FIRMWARE: Requires Series 3700 firmware revision 1.30
or later (applies to all Series 3700 mainframes)
SYSTEM SPECIFICATIONS: Refer to the Keithley
Instruments Model 3700 System Switch/Multimeter
Specifications Rev. C or later
EMC: Compliant with European Union EMC Directive
2004/108/EC, EN61326-1.
NOTES
1. Connections made using 3731-ST.
2. 3706 mainframe with all DMM backplane relays disconnected.
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Analog Backplane 1
(DMM Input)
Analog Backplane 2
(DMM Sense)
Analog Backplane 3
Analog Backplane 4
Analog Backplane 5
Analog Backplane 6
16151413121110987654321
1
2
3
4
5
6
Rows
Columns
Matrix Crosspoint
Relay Detail
HI
LO
HI
LO
Side Text
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A G R E A T E R M E A S U R E O F C O N F I D E N C E
Quad 4×28, ultra-high density, reed relay matrix card
• Four independent banks of
4×28 single pole matrices
• 200V, 1.2A carry or 0.75A
switched signal capacity;
15W, 15VA
• Bank configuration relays
enable alternative matrix sizes,
including:
– Dual 4×56 (1 wire)
– Single 4×112 (1 wire)
– Single 4×56 (2 wire)
• Optional accessory, Model
3732-ST-R, enables screw
terminal access and additional
matrix sizes including:
– Dual 8×28 (1 wire)
– Single 16×28 (1 wire)
– Single 8×28 (2 wire)
• Analog backplane connection
relays provide easy card-to-card
column expansion
• Long life dry reed relays
(>109 operations)
• Ideal for high channel count
I-V testing with Series
2600A System SourceMeter®
Instruments
The ultra-high density Model 3732 matrix card is comprised of four banks, each with 4 rows by 28
columns of reed relays. This provides 448 single-pole crosspoints for maximum connection versatility
in high channel count applications. For even greater flexibility, bank configuration relays are
mounted on the card. They offer an automated method of connecting banks to enable two additional
matrix configurations: single 4×112 and dual 4×56. This feature allows the matrix size to be easily
adapted to existing or future applications. For differential (2-wire) measurements, a two-pole mode
can be selected that enables automatic pairing of crosspoints to create a dual 4×28 or single 4×56
configuration. For larger matrix sizes, analog backplane relays are provided that enable rows to
connect to the Series 3700 mainframe backplane. This allows, for example, a matrix of up to 4 rows
by 672 columns within a single 3706 mainframe using six Model 3732 cards.
The card uses optimized reed relays that offer both low contact potential and low current offset to
minimize the switching errors that often accompany this relay technology. Additionally, these relays
provide greater signal voltage (200V) and current (1.2A carry) dynamic range while supporting the
long life and fast actuation times necessary in many automated test applications.
The Model 3732 uses two 78-pin male D-sub connectors for signal and configuration connections.
For screw terminal connections, two accessories are offered. Use the 3732-ST-R for the 16×28 or
dual 8×28 matrix configurations. Use the 3732-ST-C for the 4×112, dual 4×56, or base quad 4×28
matrix configurations.
Ordering Information
3732 Quad 4×28, Ultra-
High Density, Reed
Relay Matrix Card
ACCESSORIES AVAILABLE
3732-ST-C Screw Terminal Block for matrix configurations:
Quad 4×28 (1 wire)
Dual 4×28 (2 wire)
Single 4×56 (2 wire)
Dual 4×56 (1 wire)
Single 4×112 (1 wire)
3732-ST-R Screw Terminal Block for matrix configurations:
Dual 8×28 (1 wire)
Single 8×28 (2 wire)
Single 16×28 (1 wire)
3720-MTC-1.5 78-pin, D-sub Female-to-Male Cable, 1.5m (5 ft.)
3720-MTC-3 78-pin, D-sub Female-to-Male Cable, 3m (10 ft.)
3791-CIT Contact Insertion and Extraction Tool
3791-KIT78-R 78-pin, Female D-sub Connector Kit (contains
2 female D-sub connectors and 156 solder-cup
contacts)
3732
Quad 4×28, Ultra-High Density,
Reed Relay Matrix Card
448 one-pole crosspoints with bank configuration and backplane connection relays
SERVICES AVAILABLE
3732-3Y-EW-STD 1-year factory warranty extended to 3 years
from date of shipment
3732-5Y-EW-STD 1-year factory warranty extended to 5 years
from date of shipment
C/3732-3Y-STD 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
Side Text
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20
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model specificationsModel 3732 specifications
3732 Quad 4×28, Ultra-High Density,
Reed Relay Matrix Card
448 one-pole crosspoints with bank configuration and backplane connection relays
Matrix Bank 1
1
Rows
2
3
4
To Analog
Backplane
Relays
of Card
1 2
Columns
27 28
Matrix Bank 2
1
Rows
2
3
4
To Analog
Backplane
Relays
of Card
1 2
Columns
27 28
Matrix Bank 3
1
Rows
2
3
4
To Analog
Backplane
Relays
of Card
1 2
Columns
27 28
Matrix Bank 4
1
Rows
2
3
To Analog
Backplane
Relays
of Card
1 2
Columns
27 28
Matrix Crosspoint
Relay Detail
Analog
Backplane Analog
Backplane
Matrix
Rows
Bank 1
1
2
Matrix
Rows
Bank 3
To Series 3700
Mainframe
Analog
Backplane
3
4
5
6
Matrix
Rows
Bank 2
Matrix
Rows
Bank 4
Analog Backplane Connection Relays
4
Matrix Crosspoint
Relay Detail
Matrix Crosspoint
Relay Detail
Matrix Crosspoint
Relay Detail
Quad 4×28 (1-wire) or Dual 4×28 (2-wire) Matrix Configuration
Side Text
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A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3732 specifications
3732 Quad 4×28, Ultra-High Density,
Reed Relay Matrix Card
448 one-pole crosspoints with bank configuration and backplane connection relays
1
1 2
Columns
Rows 2
27 28
3
4
Matrix Bank 1
3732-ST-R
Screw Terminal
Block*
5
Rows 6
7
8
Matrix Bank 2
1
1 2
Columns
Rows 2
27 28
3
4
Matrix Bank 3
5
Rows 6
7
8
Matrix Bank 4
*Automatically connects columns
Dual 8×28 (1-wire) or single 8×28 (2-wire) matrix configuration using one Model 3732-ST-R
screw terminal block
Single 16×28 (1-wire) matrix configuration
using one Model 3732-ST-R screw terminal
block
1
1 2
Columns
Rows 2
27 28
3
4
Matrix Bank 1
5
Rows 6
7
8
Matrix Bank 2
9
Rows 10
11
12
Matrix Bank 3
13
Rows 14
15
16
Matrix Bank 4
3732-ST-R Screw Terminal Block*
*Automatically connects columns
Additional Matrix Configurations Using the Model 3732-ST-R Screw Terminal Block
Dual 4×56 (1-wire) or single 4×56 (2-wire) matrix configuration using bank configuration relays
Single 4×112 (1-wire) matrix configuration using bank configuration relays
1
1 2
Columns
Rows 2
27 28 29 30
Columns
55 56 1 2
Columns
27 28 29 30
Columns
55 56
3
4
Matrix
Bank 1
Matrix
Bank 2
Bank Configuration Relays
Matrix
Bank 3
Matrix
Bank 4
1
1 2
Columns
Rows 2
27 28 29 30
Columns
55 56 57 58
Columns
83 84 85 86
Columns
111 112
3
4
Matrix
Bank 1
Matrix
Bank 2
Bank Configuration Relays
Matrix
Bank 3
Matrix
Bank 4
Additional Matrix Configurations Using Bank Configuration Relays
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A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3732 specifications
3732 Quad 4×28, Ultra-High Density,
Reed Relay Matrix Card
448 one-pole crosspoints with bank configuration and backplane connection relays
MATRIX CONFIGURATION: Four banks, each with 4 rows by
28 columns of reed relays. Bank configuration and analog
backplane relays are included for additional matrix configura-
tions. Banks can be connected together via relays creating
dual 4×56 matrices or a single 4×112 matrix. Row expansion
is available using optional screw terminal accessories.
CONTACT CONFIGURATION: Single-pole form A.
CONNECTOR TYPE: Two 78-pin male D-shells.
MODEL 3732-ST-R SCREW TERMINAL OPTION: Provides ter-
minal block access and column jumper blocks for extended
row configurations including Dual 8×28 (1W), Single 8×28
(2W), and Single 16×28 (1W).
Typical Wire Size: #22 AWG with 0.062 inch O.D.; 88 con-
ductors per card maximum.
Maximum Wire Size: #16 AWG with 0.092 inch O.D.; 44
conductors per card maximum.
MODEL 3732-ST-C SCREW TERMINAL OPTION: Provides
terminal block access for Quad 4×28 (1W), Dual 4×28 (2W),
Dual 4×56 (1W), Single 4×56 (2W), and Single 4×112 (1W)
matrix configurations.
Typical Wire Size: #22 AWG with 0.062 inch O.D.; 88 con-
ductors per card maximum.
Maximum Wire Size: #16 AWG with 0.092 inch O.D.; 44
conductors per card maximum.
MAXIMUM SIGNAL LEVEL: 200VDC or peak AC, 0.75A
switched (1.2A carry), 15W/15VA max. switch power.
COMMON MODE VOLTAGE: 200VDC or peak AC between any
signal path to a signal path or ground.
VOLT-HERTZ LIMIT: 8×107.
CONTACT LIFE: Reed: >109 operations no load, >8×106 opera-
tions @ 100V, 10mA.
EMR (Backplane): >108 operations @ 5V, 10mA and 105 opera-
tions at maximum signal level.
MODEL 3732 PARAMETERS
Parameter Quad 4×28 1, 2 Dual 4×56 1, 2 Single 4×112 1, 2 Dual 8×28 2, 3 Single 16×28 2, 3
Channel Resistance
(end of life) <1.5 W<2.0 W<2.5 W<1.6 W<2.0 W
Contact Potential
(differential) <±10 μV <±20 μV N/A <±15 μV N/A
Contact Potential
(single ended) <±20 μV <±40 μV <±65 μV <± 20 μV <±20 μV
Offset Current <±0.5 nA <±1.0 nA <±2.0 nA <±1.0 nA <±2.0 nA
Isolation
CH-CH 3×109 W/150 pF 1.5×109 W/300 pF 7.5×108 W/600 pF 2×109 W/200 pF 1.5×109 W/300 pF
Common mode 1.5×109 W/300 pF 1.5×109 W/300 pF 7.5×108 W/600 pF 2×109 W/200 pF 1.5×109 W/300 pF
Crosstalk Ch-Ch
300 kHz <–37 dB <–37 dB <–37 dB <–37 dB <–37 dB
1 MHz <–26 dB <–26 dB <–26 dB <–26 dB <–26 dB
15 MHz < –7 dB < –7 dB < –7 dB < –7 dB < –7 dB
Bandwidth 15 MHz 15 MHz 10 MHz 15 MHz 15 MHz
1. Connections made using Model 3732-ST-C.
2. Model 3706 mainframe with all DMM backplane relays disconnected.
3. Connections made using Model 3732-ST-R.
GENERAL SPECIFICATIONS
POWER BUDGET INFORMATION:
Quiescent Power Usage:
Mode Quiescent Power
Quad 4×28 780 mW
Dual 4×56 916 mW
Single 4×112 984 mW
Dual 8×28 780 mW
Single 16×28 780 mW
Channel Relay Power Consumption (each): 17mW.
Backplane Relay Power Consumption (each): 100mW.
For additional power-budgeting information, refer to the
Series 3700 Module Schematics and Connections section in
the Series 3700 User’s Manual (part no. 3700S-900-01).
ACTUATION TIME: 0.6ms.
RELAY TYPE: Reed (signal relays); EMR (backplane relays)
RELAY DRIVE SCHEME: Direct drive.
RELAY DRIVE CURRENT: 3.2mA.
INTERLOCK: Backplane relays disabled when terminal
assembly interlock signal removed. When asserted allows
system to read and save ID configuration bits.
EMC: Compliant with European Union EMC Directive.
SAFETY: Compliant with European Union Law Voltage
Directive.
FIRMWARE: Requires Series 3700 firmware revision 1.40 or
later (applies to all Series 3700 mainframes).
SYSTEM SPECIFICATIONS: Refer to the Keithley Instruments
Model 3700 System Switch/Multimeter Specifications Rev.
D or later.
OPERATING ENVIRONMENT: Specified for 0° to 50°C.
Specified to 70% relative humidity at 35°C.
STORAGE ENVIRONMENT: –25° to 65°C.
WEIGHT: 3.40 lbs (1.54kg).
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A G R E A T E R M E A S U R E O F C O N F I D E N C E
32 channel isolated switch card
• 28 general purpose
Form C relays rated for 300V,
2A switched or 3A carry signal
capacity; 60W, 125VA
• 4 high current Form A relays
rated for 250VAC, 7A or 30VDC,
7A switched capacity; 210W
• Analog backplane connection
relays provided for user
interconnections
• Screw terminal connections
provided on removable 3740-ST
accessory
• Relay closures stored in
onboard memory
• Latching electromechanical
relays
The Model 3740 offers 28 general-purpose form C channels that are ideal for routing power or other
control devices. For higher power applications of up to 7A, four additional high current form A
channels are provided.
If any general purpose signal requires routing to the Series 3700 mainframe backplane, terminal
blocks are located on the card, which are enabled with jumpers. Custom configurations can be
created with the user accessible terminal blocks. For additional protection, an onboard temperature
sensor will notify the mainframe when the card’s operating temperature exceeds 70°C, compromising
system specifications.
The Model 3740 uses two 50-pin male D-sub connectors for signal connections. For screw terminal
connections, use the detachable Model 3740-ST accessory.
Ordering Information
3740 General Purpose Card
with 32 Independent
Channels
ACCESSORIES AVAILABLE
3721-MTC-1.5 50 Pin D-sub Female to Male Cable, 1.5m (5 ft.)
3721-MTC-3 50 Pin D-sub Female to Male Cable, 3m (10 ft.)
3740-ST Screw Terminal Block
3790-KIT50-R 50 Pin Female D-sub Connector Kit (contains
2 female D-sub connectors and 100 solder cup
contacts)
3740
32-channel Isolated Switch Card
28 Form C relays and 4 high power Form A relays
SERVICES AVAILABLE
3740-3Y-EW-STD 1-year factory warranty extended to 3 years
from date of shipment
3740-5Y-EW-STD 1-year factory warranty extended to 5 years
from date of shipment
C/3740-3Y-STD 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
SWITCHING AND CONTROL
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24
A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3740 specifications
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
HI
LO
Analog Backplane 1
(DMM Input)
Analog Backplane 2
(DMM Sense)
Analog Backplane 3
Analog Backplane 4
Analog Backplane 5
Analog Backplane 6
To Series 3700 Mainframe Analog Backplane
NC
NO
Channel 13
COM
NC
NO
Channel 28
COM
Channels 14–27
NC
NO
Channel 1
COM
NC
NO
Channel 12
COM
Channels 2–11
Channel 29
Channel 32
Channels 30–31
Terminal
Blocks
RELAY SWITCH CONFIGURATION: 32 general purpose independent channels. 28 channels of
Form C switching at 2A and 4 channels of Form A switching at 7A. Relays can be connected to
each other and backplane via removable terminal blocks.
CONTACT CONFIGURATION: General Purpose: 1 pole Form C. High Current: 1 pole Form A.
CONNECTOR TYPE: Two 50 pin male D-shells.
MODEL 3740-ST SCREW TERMINAL OPTION: #22 AWG typical wire size with 0.062 inch O.D.
84 conductors maximum. #16 AWG maximum wire size with 0.092 inch O.D. 44 conductors per
card maximum.
MAXIMUM SIGNAL LEVEL: Form C: 300V DC or RMS, 2A switched (3A carry), 60W, 125VA.
Form A: 250VAC 7A, 30VDC 7A, 210W.
COMMON MODE VOLTAGE: 300V DC or RMS between any terminal and chassis.
VOLT-HERTZ LIMIT: 8×107.
CONTACT LIFE: Form C: >105 operations at maximum signal level. >108 operations no load.1
Form A: >105 operations at maximum signal level, >5×107 operations no load.1
CHANNEL RESISTANCE (end of contact life): <0.5
W.
CONTACT POTENTIAL: <±3μV typical per contact.
ISOLATION: Channel-channel: 109
W
, <200pF. Common Mode: >1010
W
, <150pF.
Crosstalk (Channel-channel, 50
W
load–50
W
source): 100kHz: <–50dB. 1MHz: <–35dB.
10MHz: <–15dB.
BANDWIDTH: 30MHz.
GENERAL
OVER-TEMPERATURE: Temperature sensor indicates over temperature.
ACTUATION TIME: Form C: 4ms. Form A: 10ms.
RELAY TYPE: Form C: Latching electromechanical. Form A: Nonlatching electromechanical.
RELAY DRIVE SCHEME: Direct.
INTERLOCK: Backplane relays disabled when interlock connection is removed.
OPERATING ENVIRONMENT: Specified for 0° to 50°C. Specified to 70% R.H. at 35°C.
STORAGE ENVIRONMENT: –25° to 65°C.
WEIGHT: 2.5 lbs.
SAFETY: Conforms to European Union Directive 73/23/EEC, EN61010-1.
EMC: Conforms to European Union Directive 2004/108/EC, EN61326-1.
NOTES
1. Minimum signal level 10mV, 10μA.
3740 32-channel Isolated Switch Card
28 Form C relays and 4 high power Form A relays
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A G R E A T E R M E A S U R E O F C O N F I D E N C E
Multifunction control card
3750
Multifunction Control Card
40 digital I/O bits, 2 analog output channels, and 4 counters
Use the Model 3750 to monitor and control your automated test system. The flexibility and speed
provided by the 40 digital I/O bits, four counters, and two analog outputs make it well-suited for
a wide variety of system control applications.
Digital I/O
The Model 3750 offers 40 digital I/O bits arranged in five banks. Each bank is comprised of eight
bits each, and each bank can be programmed as either input or output. Digital I/O is often used to
control processes and monitor the status of switches, contacts, and other control points. Additional
features include scanning capabilities, such as writing a unique output pattern or reading banks
of inputs at rates up to 1000 rdgs/second. Also, pattern matching is available, making it ideal for
complex event algorithms.
Further versatility is provided by supporting external voltage levels of up to 30V and output current
sink levels of 300mA for control of external devices like RF/microwave relays.
Analog Outputs
The two analog outputs of the Model 3750 are designed for general purpose applications such as
setpoint control or as bias supplies to your device under test. For maximum utility, these outputs are
programmable as voltage (±12V) or current (0–20mA or 4–20mA). A number of protection features
are provided, including monitoring for current and/or voltage compliance and the ability to disconnect
automatically during fault conditions. Output relays are supplied for each channel, ensuring mechanical
isolation between your control device and the analog output.
Counters
Four 32-bit counters are provided with a maximum input rate of 1MHz. Each counter has a gate input
that offers precise control of event counting and totalizing for a broad range of system components,
such as: fixtures, limit switches, pass/fail indicators, revolutions, or time-related quantities. The
counters, like the digital I/O, can be used in scanning operations and pattern matching as well
as supporting reading rates of up to 1000 rdgs/second.
Self-calibration
When your Model 3706 mainframe is equipped with the high performance multimeter option,
hardware and software is provided for self-calibration of analog outputs (voltage and current)
and counter thresholds.
• 40 bidirectional digital
input/output bits
• High current driver outputs for
sinking (300mA)
• Internal 5V, 50mA logic supply
for powering external logic
circuits
• 2 isolated analog output
channels, programmable to
±12V, 0–20mA, or 4–20mA
• 4 gated 32-bit counters with
1MHz input rate
• Screw terminal connections
provided with removable
3750-ST accessory
• External supply voltage
supported on digital I/O
Ordering Information
3750 Multifunction
Control Card
ACCESSORIES AVAILABLE
3721-MTC-1.5 50-pin female-to-male D-sub Cable Assembly,
1.5m (4.9 ft)
3721-MTC-3 50-pin female-to-male D-sub Cable Assembly,
3m (9.8 ft)
3750-ST Screw Terminal Block
3790-KIT50-R 50-pin female D-sub Connector Kit (contains 2
D-sub connectors and 100 solder cup contacts)
SERVICES AVAILABLE
3750-3Y-EW 1-year factory warranty extended to 3 years
from date of shipment
C/3750-3Y-DATA 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
SWITCHING AND CONTROL
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26
A G R E A T E R M E A S U R E O F C O N F I D E N C E
3750 Multifunction Control Card
40 digital I/O bits, 2 analog output channels, and 4 counters
Channels 1–5: Bidirectional, high current digital I/O (40 bits)
Channels 6–9: 32-bit counters (4 counters)
Channels 10–11: Isolated voltage or current analog outputs (2 each)
Digital
Inputs
or
Digital
Outputs
Total of 5 banks
8 bits per bank
Channels
1–5
1
2
3
4
8 Bits
5
6
7
8
Bank 1
Counter
Total of 4 counters
Gate +
Gate –
32 Bit
Count
Input +
Input –
Counter 1
TTL
or
AC
Channels
6–9
Total of 2 analog outputs
(isolated from earth)
Channels
10–11
VOUT ±12V
(0–20mA)
(4–20mA)
VCOM
IOUT
ICOM
Analog Output 1
16 Bits DAC VOUT
IOUT
10mA max.
Sourcing Only
300mA max.
Sinking Only
Optional Jumper
Self
Resetting
Input
Simplified Digital I/O Schematic
System 5V
Output
Pull-up
Resistor
~68kΩ
Pull-up Voltage
(8 DIO)
+
–
DIO n
Logic Supply
(50mA max.)
V EXTERNAL
(VEXT1, VEXT2)
(30V max.)
Specifications
DIGITAL I/O1
CONFIGURATION: 40 bidirectional digital I/O bits arranged in 5 banks of 8 bits each.
Each bank can be configured for either input or output capability. 1 bank of I/O is equivalent
to 1 system channel.
DIGITAL INPUT SPECIFICATIONS
An internal weak pull-up resistor of approximately 68kW is provided on the card for each I/O.
This pull-up resistor can be removed via onboard jumper on a channel (8 bit) basis. The pull-up
voltage can either connect to the internally supplied 5V or an externally supplied voltage of up
to 30V via onboard jumper. An internal 5V supply connection is separately available to run
external logic circuits.
DIGITAL INPUT LOGIC LOW VOLTAGE: 0.8V max.
DIGITAL INPUT LOGIC HIGH VOLTAGE: 2V min.
DIGITAL INPUT LOGIC LOW CURRENT: –600μA max @ 0V.
DIGITAL INPUT LOGIC HIGH CURRENT: 50μA max @ 5V.
LOGIC: Positive true.
SYSTEM INPUT MINIMUM READ SPEED2: 1000 readings/second.
MAXIMUM EXTERNALLY SUPPLIED PULL-UP VOLTAGE: 30V.
MAXIMUM EXTERNALLY SUPPLIED VOLTAGE TO ANY DIGITAL I/O LINE: Pull-up voltage
(5V internal or up to 30V external).
DIGITAL OUTPUT SPECIFICATIONS
Each output has an internal fly-back diode for driving inductive loads. Each output is protected
against continuous short circuits and over temperature. An internal 5V supply connection is
separately available to run external logic circuits.
DIGITAL OUTPUT LOGIC HIGH VOLTAGE: 2.4V minimum @ Iout = 10mA, sourcing only.
DIGITAL OUTPUT LOGIC LOW VOLTAGE: 0.5V maximum @ Iout = -300mA, sinking only.
MAXIMUM OUTPUT SINK CURRENT: 300mA per output, 3.0A total per card.
LOGIC: Positive true.
SYSTEM OUTPUT MINIMUM WRITE SPEED3: 1000 readings/second.
MAXIMUM EXTERNALLY SUPPLIED VOLTAGE TO ANY DIGITAL I/O LINE: Pull-up voltage
(5V internal or up to 30V external).
ALARM: Trigger generation is supported for a maskable pattern match or state change on any of
channels 1 through 5.
PROTECTION: Optional disconnect (set to inputs) during output fault conditions.
INTERNAL 5V LOGIC SUPPLY: The internal logic supply is designed for powering external logic
circuits of up to 50mA maximum. The logic supply is internally protected with a self-resetting
fuse. Fuse reset time < 1 hour.
NOTES
1. All channels power up configured as inputs.
2. All channels configured as inputs.
3. All channels configured as outputs.
Figure 2. Simplified I/O schematic
Figure 1. Block diagram
Model 3750 specifications
Side Text
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A G R E A T E R M E A S U R E O F C O N F I D E N C E
Model 3750 specifications
3750 Multifunction Control Card
40 digital I/O bits, 2 analog output channels, and 4 counters
VCOM
VCOM
<100pF
Test Circuit for Voltage Output
Channels 10 and 11
DAC VOUT
1.2kΩ
+
–
ICOM
<100pF
Test Circuit for Current Output
Channels 10 and 11
DAC IOUT
500Ω
COUNTER/TOTALIZER INPUT
MAXIMUM COUNT: 232 – 1.
MAXIMUM INPUT RATE: 1MHz, rising or falling edge, programmable.
MINIMUM INPUT PULSE WIDTH: 500ns.
INPUT SIGNAL LEVEL: 200mV p-p (minimum), 42V peak (maximum).
THRESHOLD: AC (0V) or TTL logic level.
GATE INPUT: TTL–HI (Gate+), TTL–LO (Gate–) or NONE.
MINIMUM GATE INPUT SETUP TIME: 1μs.
COUNT RESET: Manual or Read + Reset.
SYSTEM INPUT MINIMUM READ SPEED: 1000 readings/second.
ALARM: Trigger generation is supported for a count match or counter overflow
on any of channels 6 though 9.
ANALOG VOLTAGE OUTPUT
The isolated analog voltage output is designed for general purpose, low power applications.
OUTPUT AMPLITUDE1: ±12V up to 10mA.
OVERLOAD CURRENT: 21mA minimum.
RESOLUTION: 1mV.
FULL SCALE SETTLING TIME2: 1ms to 0.1% of output.
DC ACCURACY3 ±(% of output + mV):
1 Year 23° ±5°C: 0.15% + 16mV.
90 Day 23° ±5°C: 0.1% + 16mV.
24 Hour 23° ±5°C: 0.04% + 16mV.
TEMPERATURE COEFFICIENT: ±(0.02% + 1.2mV)/°C.
10mV MAXIMUM UPDATE RATE: 350μs to 1% accuracy. System limited.
OUTPUT FAULT DETECTION: System fault detection is available for short circuit
output/current compliance.
ISOLATION: 300V peak channel to channel or channel to chassis.
PROTECTION: Optional disconnect during output fault conditions.
MINIMUM GUARANTEED STABLE CAPACITIVE LOAD: 10nF.
NOTES
1. Programming up to 1% over full scale range is supported.
2. Measured with standard load shown in Figure 3.
3. Measured with >10MW input DMM (DCV, filter, 1 PLC rate).
Warm-up time is 1 hour @ 10mA load with 3750-ST.
ANALOG CURRENT OUTPUT
The isolated analog current output is designed for 0–20mA or 4–20mA
unipolar modes of operation.
OUTPUT AMPLITUDE: 0 to 20mA or 4 to 20mA.
COMPLIANCE VOLTAGE: 11V minimum.
MAXIMUM OPEN CIRCUIT VOLTAGE: 16V.
RESOLUTION: 1μA.
FULL SCALE SETTLING TIME1: 1ms to 0.1% of output.
DC ACCURACY2 ±(% of output + µA):
1 Year 23° ±5°C: 0.15% + 18μA.
90 Day 23° ±5°C: 0.1% + 18μA.
24 Hour 23° ±5°C: 0.04% + 18μA.
TEMPERATURE COEFFICIENT: ±(0.02% + 1.6μA)/°C.
OUTPUT FAULT DETECTION: System fault detection is available for open
circuit output/voltage compliance.
ISOLATION: 300V peak channel to channel or channel to chassis.
PROTECTION: Optional disconnect during output fault conditions.
NOTES
1. Measured with standard load shown in Figure 3.
2. Measured with <2W shunt DMM (DCI, filter, 1 PLC rate). Warm-up time is 1 hour with 3750-ST.
Figure 3. Standard load test circuits
GENERAL
CONNECTOR TYPE: Two 50-pin male D-shells.
OPERATING ENVIRONMENT: Specified for 0ºC to 50ºC. Specified to 70% R.H. at 35ºC.
STORAGE ENVIRONMENT: –25ºC to 65ºC.
WEIGHT: 1.27kg (2.80 lbs.).
FIRMWARE: Requires main revision to be 1.20 or above. (Applies to all Series 3700
mainframes.)
SAFETY: Conforms to European Union Directive 73/23/EEC, EN61010-1.
EMC: Conforms to European Union Directive 2004/108/EC, EN61326-1.
POWER BUDGET INFORMATION:
Quiescent Power: 3300mW.
Digital Outputs Each Channel (1 through 5): 325mW.
Analog Channel Each (10 and 11): 820mW.
Totalizer Channel All (6 through 9): 730mW.
Analog channels and counter channels may optionally be turned off to conserve
system power.
See Chapter 8 of the Series 3700 user’s manual for more detailed information.
Specifications are subject to change without notice.
All Keithley trademarks and trade names are the property of Keithley Instruments, Inc.
All other trademarks and trade names are the property of their respective companies.
A GREATER MEASURE OF CONFIDENCE
KEITHLEY INSTRUMENTS, INC. ■ 28775 AURORA RD. ■ CLEVELAND, OH 44139-1891 ■ 440-248-0400 ■ Fax: 440-248-6168 ■ 1-888-KEITHLEY ■ www.keithley.com
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© Copyright 2010 Keithley Instruments, Inc. Printed in the U.S.A. No. 3081 10.04.10
