Allen-Bradley CompactLogix 1769-L23E-QB1B Installation Instructions Manual page 25

HSC Single-ended Encoder Wiring Diagram
Allen-Bradley
845H Series
Single-ended
Encoder
Shield/housing
Connect only if housing is electronically
isolated from the motor and ground.
(1) Refer to your encoder manual for proper cable type. The type of cable used should be twisted-pair, individually shielded cable with a maximum
length of 300 m (1000 ft.).
(2) External resistors are required if they are not internal to the encoder. The pull-up resistor (R) value depends on the power supply value. The table
below shows the maximum resistor values for typical supply voltages. To calculate the maximum resistor value, use this formula:
 DC 
V – Vmin
R = ------------------------------------- -
Imin
Where:
R = maximum pull-up resistor value
VDC = power supply voltage
Vmin = 2.6V DC
Imin = 6.8 mA
Power Supply Voltage (V DC)
5V DC
12V DC
24V DC
(1) Resistance values may change, depending upon your application.
The minimum resistor (R) value depends on the current sinking capability of the encoder. Refer
to your encoder's documentation for more information.
(1)
Cable
VS
GND
(2)
R
A
B
Z
Shield
Maximum Pull-up Resistor Value (R)
352 
1382 
3147 
Rockwell Automation Publication 1769-IN082C-EN-P - February 2013
CompactLogix Controller 25
+VDC
Power
COM
Supply
A1(+)
A1(–)
B1(+)
B1(–)
Z1(+)
Z1(–)
Inputs
Earth
(1)