Encoders
7–35
Square Flange Mount
845K–SADZ14CRY3
Description
The
Bulletin 845K is a size 25 industrial
optical incremental encoder
. These
encoders electronically digitize shaft
motion of a rotating element by
converting mechanical motion to an
electronic digital format.
The Bulletin 845K encoders have code
disk resolutions up to 5000 pulses per
revolution and a signal frequency
response of 210 kHz.
Features
S
Code disk resolution up to 5000 PPR
S
Optional sink, source, open collector
or dif
ferential line driver output
configurations
S210kHz operating frequency
S
24in pigtail cable termination
S
Input reverse polarity protection
S
CE marked for all applicable
directives
Specifications
Accessories
Description Page
Number
Flexible Couplings 7–50
Measuring Wheels 7–51
Servo Clamps 7–51
Mounting Plates 7–55
Differential Encoder
Buffer Board
7–58
Bulletin
845K Optical Incremental Encoders
NEMA Type 1, Size 25, High Performance
Code Format
Quadrature
Symmetry
Zero Index Channel
Power Requirements
Frequency Response
Operating Speed (Data)
Resolution
Output Drive Capability
Mechanical
Starting Torque
Running Torque
Moment of Inertia
Slew Speed
Shaft Loading
Shaft Size
Environmental
Housing
Temperature
Humidity
Shock
Vibration
Approximate Ship Weight
Incremental, 2 channels with zero index
90° ±22°
Channel A leads B CCW
50%
±10%
1/2 cycle, gated to channel B
Determined by catalog number:
5V DC ±5% @ 150mA maximum
8–24V DC @ 150mA maximum
Data: 210kHz Zero index: 125kHz
(210kHz x 60)/pulses per revolution = RPM or 6000 RPM,
whichever is lower
Up to 5000 PPR on code disk
PNP current source = 20mA
NPN current sink = 20mA
Differential line driver = ±20mA
NPN open collector = 20mA
0.7Ncm typical [1.0in-oz]
0.7Ncm typical [1.0in-oz]
15gcm2 (2.1 x 10–4oz-in–sec2)
6000 RPM
Axial 89N [20lbs] (10lbs 5000 PPR)
Radial 178N [40lbs] (20lbs 5000 PPR)
9.517mm [3/8in] diameter
NEMA Type 1
0°C to +60°C (+32°F to +140°F)—operating
–25°C to +90°C (–13°F to +194°F)—storage
85%, noncondensing
50g (1
1ms duration)
20g (5 to 2000Hz)
0.91kg (2lbs)
Electrical
Encoders
7–36
Selection Guide
845K
—
SAH Z 1 4 CR Y 3
a b c d
a
Mounting Configuration
Code Description
D Square Flange
H
English Servo
b
Power Supply
Code Description
15V DC ±5%
2 8–24V DC Unregulated
c
Output Configuration Ê
Code Description
2PNP Current Source
3NPN Current Sink
4DLD 5V DC RS–422
5NPN Open Collector
24V DC Max Ë
6DLD 8–24V DC Ì
Ê
DLD = Dif
ferential Line Driver
Ë
External pull-up resistor required
Ì
Can not be ordered with 5V DC
power supply (code 1 above)
d
Resolution
Code
Description (PPR)
CA 50
CB 60
CE 64
CF 80
CG 100
DB 120
EB 180
CH 200
CJ 250
CC 254
CW 256
EG 300
CK 360
CL 400
CM 500
DW 512
EH 600
LG 900
CN 1000
FW 1024
EL 1200
CD 1250
FL 1600
CP 1800
DN 2000
CS 2048
HL 2400
CR 2500
CY 2540
CT 3600
DR 5000
Flexible
Shaft Couplings
Angle
Parallel
Off-Set
Cable
Current
Source, Current Sink,
Open Collector Outputs
Wire Pair
Wire Color
Function
Red/Bl ck
Red DC+ Input
Red/Black
Black DC Return
White/Bl ck
White Channel A Output
White/Black
Black Not Connected
Bl e/Bl ck
Blue Channel B Output
Blue/Black
Black Not Connected
Green/Bl ck
Green Channel Z Output
Green/Black
Black Not Connected
Differential Line Driver Outputs
Wire Pair
Wire Color
Function
Red/Bl ck
Red DC+ Input
Red/Black
Black DC Return
White/Bl ck
White Channel A Output
White/Black
Black
Channel A
Output
Bl e/Bl ck
Blue Channel B Output
Blue/Black
Black
Channel B
Output
Green/Bl ck
Green Channel Z Output
Green/Black
Black Channel Z Output
ATTENTION:
Rigidly coupling
the encoder shaft to the
machine shaft
will cause a
failure
in either the bearings of
the encoder or the bearings of
the machine shaft.
Bulletin
845K Optical Incremental Encoders
NEMA Type 1, Size 25, High Performance
Encoders
7–37
Dimensions—mm (inches)
21.59/22.86
(0.85/.90)
5 (0.21) Dia.—
4 Mounting Holes
Square Flange Mount
English Servo Mount
21.59/22.86
(0.85/0.90)
26.21
(1.032)
52.40
(2.063)
7.62
(0.300)
8–32 UNC-2B x 4.6 (0.18) Deep
on a 47.6 (1.875) Dia. Bolt
Circle, 3 Places—120
° Apart
6.35 (0.25)
9.517
(0.3747) Dia.
26.21 (1.032)
66.5 (2.62)
Sq.
52.40
(2.063)
63.5 (2.50)
Max
31.75
(1.250) Dia.
Pigtail
610 (24) T
yp.
8–32 UNC-2B x 4.6 (0.18) Deep
on a 47.6 (1.875) Dia. Bolt Circle,
3 Places—120
° Apart
2.54
(0.100)
7.62 (0.300)
58.67 (2.31) Dia.
65
(2.56) Dia.
63.5 (2.50)
Max
9.517
(0.3747) Dia.
31.75
(1.250) Dia.
63.50
(2.500) Dia.
Pigtail
610 (24) T
yp.
2.54 (0.100)
Bulletin
845K Optical Incremental Encoders
NEMA Type 1, Size 25, High Performance
