G-109G9SA
G9SA
Safety Relay Unit
G9SA
• Four kinds of 45-mm wide Units are
available:
A 3-safety contact model, a 5-safety
contact model, and models with 3 safe-
ty contacts and 2 OFF-delay safety
contacts.
Also available are 17.5-mm wide Ex-
pansion Units with 3 safety contacts
and 3 OFF-delay safety contacts.
• Two hand controller (type III C, EN 574)
• Simple expansion connection.
• OFF-delay models have 15-step OFF-
delay settings.
• Conforms to EN standards. (BG ap-
proval)
• Approved by UL and CSA.
• Both DIN track mounting and screw
mounting are possible.
• Suitable for PNP OSSD outputs of
safety sensors, F3SN, F3SH, F3S-B,
F3S-TGR, F3SL
Ordering Information
Emergency-stop Units
Emergency-stop OFF-delay Units
Note: The following 15-step OFF-delay time settings are available:
T075: 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, and 7.5 s
T15: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, and 15 s
T30: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, and 30 s
Two-hand Controller
Expansion Unit
The Expansion Unit connects to a G9SA-301, G9SA-501, G9SA-
321, or G9SA-TH301.
Main contacts Auxiliary contact Number of input channels Rated voltage Model Category
3PST-NO SPST-NC 1 channel or 2 channels possible 24 VAC/VDC G9SA-301
4
100 to 240 VAC
5PST-NO SPST-NC 1 channel or 2 channels possible 24 VAC/VDC G9SA-501
100 to 240 VAC
Main contacts OFF-delay
contacts
Auxiliary
contact
Number of
input channels
OFF-delay
time Rated voltage Model Category
3PST-NO DPST-NO SPST-NC
1 channel
or 2 channels
possible
7.5 s 24 VAC/VDC G9SA-321-T075 Main contacts:
4
OFF-delay
contacts:
3
100 to 240 VAC
15 s 24 VAC/VDC G9SA-321-T15
100 to 240 VAC
30 s 24 VAC/VDC G9SA-321-T30
100 to 240 VAC
Main contacts Auxiliary contact Number of input channels Rated voltage Model Category
3PST-NO SPST-NC 2 channels 24 VAC/VDC G9SA-TH301 4 (IIIc, EN574)
100 to 240 VAC
Main contacts Auxiliary contact Model Category
3PST-NO SPST-NC G9SA-EX301 4
The G9SA Series Offers a Complete
Line-up of Compact Units.
F502-EN2-04.book Seite 109 Dienstag, 26. Juli 2005 5:48 17
G-110 Safety Sensors / Components
Expansion Units with OFF-delay Outputs
The Expansion Unit connects to a G9SA-301, G9SA-501, G9SA-321, or G9SA-TH301.
Note: The following 15-step OFF-delay time settings are available:
T075: 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, and 7.5 s
T15: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, and 15 s
T30: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, and 30 s
Model Number Legend
1. Function
None: Emergency stop
EX: Expansion Unit
TH: Two-hand Controller
2. Contact Configuration (Safety Output)
0: None
3: 3PST-NO
5: 5PST-NO
3. Contact Configuration (OFF-delay Output)
0: None
2: DPST-NO
3: 3PST-NO
4. Contact Configuration (Auxiliary Output)
0: None
1: SPST-NC
5. Input Configuration (for G9SA-301/501/321)
None: 1-channel or 2-channel input possible
6. OFF-delay Time (Max. setting time)
None: No OFF-delay
T075: 7.5 seconds
T15: 15 seconds
T30: 30 seconds
Main contact form Auxiliary contact OFF-delay time Model Category
3PST-NO SPST-NC
7.5 s G9SA-EX031-T075
315 s G9SA-EX031-T15
30 s G9SA-EX031-T30
1 2 3 4 5 6
G9SA-######-####
F502-EN2-04.book Seite 110 Dienstag, 26. Juli 2005 5:48 17
G9SA
G-111G9SA
Specifications
Ratings
Power Input
Note: When an Expansion Unit is connected, the power consumption is increased by 2 VA/2 W max.
Inputs
Note: When an Expansion Unit is connected, the input current is increased by 30 mA max.
Contacts
Characteristics
Note: 1. The contact resistance was measured with 1 A at 5 VDC using the voltage-drop method.
2. The response time is the time it takes for the main contact to open after the input is turned OFF.
3. The insulation resistance was measured with 500 VDC at the same places that the dielectric strength was checked.
4. Weight shown is for 24-VAC/VDC type. For 100 to 240-VAC type, add approximately 20 g.
Item G9SA-301/TH301 G9SA-501 G9SA-321-T#
Power supply voltage 24 VAC/VDC:24 VAC, 50/60 Hz, or 24 VDC
100 to 240 VAC:100 to 240 VAC, 50/60 Hz
Operating voltage range 85% to 110% of rated power supply voltage
Power consumption
(See note.)
24 VAC/VDC: 1.8 VA/1.7 W max.
100 to 240 VAC: 9 VA max.
24 VAC/VDC: 2.8 VA/2.6 W max.
100 to 240 VAC: 11 VA max.
24 VAC/VDC: 3.5 VA/3.3 W max.
100 to 240 VAC: 12.5 VA max.
Item G9SA-301/321-T#/TH301 G9SA-501
Input current (See note.) 40 mA max. 60 mA max.
Item G9SA-301/501/321-T#/TH301/EX301/EX031-T#
Resistive load (cos φ =1)
Rated load 250 VAC, 5 A
Rated carry current 5 A
Item G9SA-301/TH301 G9SA-501/321-T#G9SA-EX301/EX031-T#
Contact resistance (see note 1) 100 mΩ
Operating time 30 ms max. (not including bounce time)
Response time (see note 2) 10 ms max. (not including bounce time)
Insulation resistance (see note 3) 100 MΩ min. (at 500 VDC)
Dielectric
strength
Between different outputs
2,500 VAC, 50/60 Hz for 1 min
Between inputs and outputs
Between power inputs and outputs
Between power inputs and other inputs
(only for 100 to 240-V models)
Vibration resistance 10 to 55 Hz, 0.75-mm double amplitude
Shock
resistance
Destruction 300 m/s2
Malfunction 100 m/s2
Durability Mechanical 5,000,000 operations min. (at approx. 7,200 operations/hr)
Electrical 100,000 operations min. (at approx. 1,800 operations/hr)
Minimum permissible load (reference value) 5 VDC, 1 mA
Ambient temperature Operating:-25°C to 55°C (with no icing or condensation)
Storage:-25°C to 85°C (with no icing or condensation)
Ambient humidity Operating:35% to 85%
Storage:35% to 85%
Terminal tightening torque 0.98 N·m
Weight (see note 4) Approx. 210 g Approx. 270 g Approx. 130 g
Approved standards EN954-1, EN60204-1, EN574 (-TH301), UL508, CSA C22.2 No. 14
EMC EMI: EN55011 group 1 class A
EMS: EN50082-2 group 1
F502-EN2-04.book Seite 111 Dienstag, 26. Juli 2005 5:48 17
G-112 Safety Sensors / Components
Application Examples
G9SA-301 (24 VAC/VDC) with 2-channel Limit Switch Input/Auto-reset
G9SA-301 (24 VAC/VDC) with 2-channel Limit Switch Input/Manual-reset
Feedback loop
Timing Chart
Open
Control
circuit
Limit switches
S1 and S2
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
S1: Safety Limit Switch
with direct opening mechanism
(D4N or D4B)
S2: Limit switch
KM1 and KM2: Magnetic Contactor
M: 3-phase motor
Note: This circuit achieves EN954-1
Safety Category 4.
Feedback loop
Timing Chart
PC input
PC output
KM3
Open
Control
circuit
Limit switches
S1 and S2
Reset switch
S3
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
S1: Safety Limit Switch
with direct opening mechanism
(D4N or D4B)
S2: Limit switch
S3: Reset switch
KM1 and KM2: Magnetic Contactor
KM3: Solid-state Contactor
M: 3-phase motor
Note: This circuit achieves EN954-1
Safety Category 4.
F502-EN2-04.book Seite 112 Dienstag, 26. Juli 2005 5:48 17
G-113G9SA
G9SA
G9SA-301 (100 to 240 VAC) with 2-channel Limit Switch Input/Auto-reset
G9SA-301 (24 VAC/VDC) with 2-channel Emergency Stop Switch Input/Manual-reset
Feedback loop
Timing Chart
Open
Control
circuit
Limit switches
S1 and S2
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
S1: Safety Limit Switch
with direct opening mechanism
(D4N or D4B)
S2: Limit switch
KM1 and KM2: Magnetic Contactor
M: 3-phase motor
Note: This circuit achieves EN954-1
Safety Category 4.
Feedback loop
Timing Chart
PC input
PC output
KM3
Control
circuit
Emergency
stop switch S1
Reset switch
S2
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
S1: Emergency stop switch
with direct opening mechanism
(A165E or A22E)
S2: Reset switch
KM1 and KM2: Magnetic Contactor
KM3: Solid-state Contactor
M: 3-phase motor
Note: This circuit achieves EN954-1
Safety Category 4.
F502-EN2-04.book Seite 113 Dienstag, 26. Juli 2005 5:48 17
G-114 Safety Sensors / Components
G9SA-321-T# (24 VAC/VDC) with 2-channel Limit Switch Input/Manual-reset
Feedback loop
Motor controller
Timing Chart
Motor rotation
OFF-delay time
Open
Off delay
timer Control
circuit
Operation
instruction
S1: Safety Limit Switch
with direct opening mechanism
(D4N or D4B)
S2: Limit switch
S3: Reset switch
KM1 and KM2: Magnetic Contactor
M: 3-phase motor
Limit switches
S1 and S2
Reset switch
S3
K1 and K2
(NC)
K1 and K2
(NO)
K3 and K4
(NC)
K3 and K4
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
Operation
instruction
Note: This circuit achieves EN954-1 Safety Category 4.
The OFF-delay output, however, achieves EN954-1
Safety Category 3.
F502-EN2-04.book Seite 114 Dienstag, 26. Juli 2005 5:48 17
G-115G9SA
G9SA
G9SA-321-T# (24 VAC/VDC) + G9SA-EX031-T# with 2-channel Limit Switch Input/Manual-reset
Feedback loop
Motor controller
Timing Chart
OFF-delay time 1
OFF-delay time 2
Open
Motor controller
Off delay
timer Control
circuit
Off delay
timer
Operation
instruction
Operation
instruction
S1: Safety Limit Switch
with direct opening mechanism
(D4N or D4B)
S2: Limit switch
S3: Reset switch
KM1, KM2,
KM3, and KM4: Magnetic Contactor
M1, M2: 3-phase motor
Limit switches
S1 and S2
Reset switch
S3
G9SA-321-T#
K1 and K2 (NC)
G9SA-321-T#
K1 and K2 (NO)
G9SA-321-T#
K3 and K4 (NC)
G9SA-321-T#
K3 and K4 (NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
Operation
instruction
Motor M1
rotation
G9SA-EX031
K1 and K2 (NC)
G9SA-EX-031
K1 and K2 (NO)
KM3 and KM4
(NC)
KM3 and KM4
(NO)
Operation
instruction
Motor M2
rotation
Note: This circuit achieves EN954-1 Safety Category 4.
The OFF-delay output, however, achieves EN954-1
Safety Category 3.
F502-EN2-04.book Seite 115 Dienstag, 26. Juli 2005 5:48 17
G-116 Safety Sensors / Components
G9SA-301 (24 VAC/VDC) with 2-channel Safety Area Sensor/Manual-reset
KM3
E1
Feedback loop
Reset switch S1
Timing Chart
PC input
PC output
Emitter Receiver
F3SN-A
F3SH-A
KM3
Open
Open
Control
circuit
F3SN-A Incident
Interrupted
K1 and K2
(NC)
K1 and K2
(NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
F3SN-A: Safety area sensor
S1: Reset switch
KM1 and KM2: Magnetic Contactor
KM3: Solid-state Contactor
M: 3-phase motor
E1: 24-VDC Power Supply
Note: This circuit achieves EN954-1
Safety Category 4.
Shield
0V (Blue)
OSSD2 (White)
OSSD1 (Green)
Auxiliary (Yellow)
EDM input (Red)
+24V (Brown)
+24V (Brown)
Open
Interlock selection
input (White)
Reset input (Yellow)
Test input (Green)
Open (Red)
0V (Blue)
Shield
RS-485(A) (Gray)
RS-485(B) (Pink)
F502-EN2-04.book Seite 116 Dienstag, 26. Juli 2005 5:48 17
G-117G9SA
G9SA
G9SA-TH301 (24 VDC) with 2-hand Inputs/Auto-reset
Feedback loop
S11 (NC)
S11 (NO)
Timing Chart
S12 (NC)
S12 (NO)
0.5 s max.
Control circuit
KM1 and KM2
(NC)
KM1 and KM2
(NO)
Input time difference operates only
when the difference is 0.5 s max.
S11, S12: Two-hand pushbutton switches
KM1 and KM2: Magnetic Contactor
Note: 1. Use a 1NC+1NO switch for S11
and S12.
2. This circuit achieves EN954-1
Safety Category 4.
(See note 1.)
Typ III C (EN 574)
F502-EN2-04.book Seite 117 Dienstag, 26. Juli 2005 5:48 17
G-118 Safety Sensors / Components
G9SA-501 (24 VAC/VDC) and G9SA-EX301 with 2-channel Limit Switch Input/Manual-reset
Feedback loop
Timing Chart
Open
Note: This circuit achieves EN954-1 Safety Category 4.
Control
circuit
S1: Safety Limit Switch
with direct opening mechanism
(D4N or D4B)
S2: Limit switch
S3: Reset switch
KM1 and KM2: Magnetic Contactor
M: 3-phase motor
Limit switches S1
and S2
Reset switch
S3
G9SA-501
K1, K2, K3 and
K4 (NC)
G9SA-501
K1, K2, K3, and
K4 (NO)
G9SA-EX301
K1 and K2 (NC)
G9SA-EX301
K1 and K2 (NO)
KM1 and KM2
(NC)
KM1 and KM2
(NO)
F502-EN2-04.book Seite 118 Dienstag, 26. Juli 2005 5:48 17
G9SA
G-119G9SA
Dimensions
Note: All units are in millimeters unless otherwise indicated. The diagrams are drawn in perspective.
C
D
Terminal Arrangement
G9SA-301 G9SA-TH301
Mounting Holes
Two, 4.2 dia. or M4
Terminal Arrangement
Mounting Holes
Two, 4.2 dia. or M4
4.6 dia.
45 max.
76 max.
111 max.
4.6 dia.
111 max.
76 max.
17.5 max.
Connector cover
Eight, M3
G9SA-301
G9SA-501
G9SA-321-T#
G9SA-TH301
G9SA-EX301
G9SA-EX031-T#
G9SA-301: Twenty, M3
G9SA-501: Twenty-four, M3
G9SA-321-T#: Twenty-four, M3
G9SA-TH301: Twenty-one, M3
OFF-delay time
setting switch
(see note)
Note: The OFF-delay time setting switch is
found on the G9SA-321-T# only.
G9SA-501
G9SA-321-T#
OFF-
delay
time
setting
switch
(see
note)
OFF-delay time
setting switch
(see note)
Note: The OFF-delay time setting switch is
found on the G9SA-EX031-T# only.
G9SA-EX301
G9SA-EX031-T#
OFF-delay time
setting switch
(see note)
F502-EN2-04.book Seite 119 Dienstag, 26. Juli 2005 5:48 17
G-120 Safety Sensors / Components
Installation
Internal Connections
A1 A2 T11 T12 T31 T32 13 23 33 41
1
2
3
4
5
6
K1
K1
K2
2
5
a
6
b
a
b
K2
3
4
K1
K2
1
JP
PE T21 T23 T22 AB 14
24 34 42
13 23 33 43 53 61
T31 T32
A1 A2 T11 T12
K2
K1
K3
K4
K2
b
K1
a
6
a
bK2
K1
2
5
K3
K4
3
4
1
2
3
4
5
6
JP
PE T21 T23 T22 AB 14
24 34 44 54 62
13 23 33 41
12 5 4
K1
K2
36 14 24 34 42
K1 K2
1
2
3
4
5
6
A1 A2 T11 T12
K1
aK2 K4
1
K3
K4
3
4
2
5K2
K1
14 24 34 44 54 62
AB
PE T21 T23 T22
6
bK2
K3
K1 a
b
1
2
3
4
5
6
JP
T31 T32 13 23 33 43 53 61
A1 A2 T11 T12 T31 T32T13 13 23 33 41
1
2
3
4
5
6
JP
14 24 34 42
K1
K2
1
6
2
5
K2
3
4
K1
PE T23 T21 T22 CD
25K1
K2
4
1
63
K2
K1
1
2
3
4
5
6
13 23 33 41
14 24 34 42
G9SA-301 (24 VAC/VDC)
G9SA-501 (24 VAC/VDC)
G9SA-321-T# (24 VAC/VDC)
G9SA-TH301 (24 VAC/VDC)
G9SA-EX301
G9SA-EX031-T#
2
5
Control circuit
G9SA-301 (100 to 240 VAC)
G9SA-501 (100 to 240 VAC)
G9SA-321-T# (100 to 240 VAC)
G9SA-TH301 (100 to 240 VAC)
(See note 3.) (See note 1.)
(See note 3.) (See note 1.)
(See note 3.) (See note 1.)
(See note 2.)
(See note 3.)(See note 1.)
(See note 3.)(See note 1.)
(See note 3.) (See note 1.)
Control circuit
(See note 2.)
Control
circuit Control
circuit
Control
circuit Control
circuit
Off delay
timer Control
circuit Off delay
timer Control
circuit
Off delay
timer
Note: 1. Use terminals A and B to switch reset mode.
A to B open: Manual reset
A to B closed: Auto-reset
2. Use terminals C and D to switch input conditions.
C to D open: DPDT input.
C to D closed: DPST-NC input. (Make sure T11 and
T21 are open.)
3. Use terminal T23 with + common 2-channel input.
When using T23, make sure that T21 and T22 are
open. For 1-channel input, make sure T12 and T23 are
closed.
4. With 100 to 240-VAC type, be sure to connect PE to a
protective ground. With 24-VAC/VDC type, if the power
supply is not connected to a protective ground, be sure
to connect PE to a protective ground.
5. With 24-VAC/VDC type, the power supply terminals A1
and A2 have polarities. A2 is the negative pole.
F502-EN2-04.book Seite 120 Dienstag, 26. Juli 2005 5:48 17
G-121G9SA
G9SA
Precautions
Do not touch the terminal area of the Relays or the socket terminal
area (charged area) while power is ON. Electric shock will result.
Wiring
Turn OFF the G9SA before wiring the G9SA. Do not touch the termi-
nals of the G9SA while the power is turned ON, because the termi-
nals are charged and may cause an electric shock.
Use the following to wire the G9SA.
Stranded wire: 0.75 to 1.5 mm2
Solid wire: 1.0 to 1.5 mm2
Tighten each screw to a torque of 0.78 to 1.18 N·m, or the G9SA
may malfunction or generate heat.
External inputs connected to T11 and T12 or T21 and T22 of the
G9SA-301 must be no-voltage contact inputs.
PE is a ground terminal.
When a machine is grounded at the positive, the PE terminal should
not be grounded.
Mounting Expansion Units
Turn OFF the G9SA before connecting the Expansion Unit.
When an Expansion Unit is being used, remove the connector cover
from the G9SA Safety Relay Unit (G9SA-301, G9SA-501, G9SA-
321#, or G9SA-TH301) and insert the connector of the Expansion
Unit’s connector cable.
Applicable Safety Category (EN954-1)
G9SA-series Relays meet the requirements of Safety Category 4 of
the EN954-1 standards when they are used as shown in the exam-
ples provided by OMRON. The Relays may not meet the standards
in some operating conditions. The OFF-delay output of models
G9SA-321-T# and EX031-T#, however, conform to Safety Category
3.
The applicable safety category is determined from the whole safety
control system. Make sure that the whole safety control system
meets EN954-1 requirements.
Mounting Multiple Units
When mounting multiple Units close to each other, the rated current
will be 3 A. Do not apply a current higher than 3 A.
Connecting Inputs
If using multiple G9SA models, inputs cannot be made using the
same switch. This is also true for other input terminals.
Earth Short
A positive thermistor is built into the G9SA circuits, so you can detect
earth short breakdowns and breakdown shorts between channel 1
and channel 2. If the short breakdown is canceled, reset is auto-
matic.
G9SA G9SA
F502-EN2-04.book Seite 121 Dienstag, 26. Juli 2005 5:48 17
G-122 Safety Sensors / Components
In the interest of product improvement, specifications are subject to change without notice.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
Cat. No. J121-E2-03A-X
F502-EN2-04.book Seite 122 Dienstag, 26. Juli 2005 5:48 17
