Rockwell Automation 1746-HSCE2 Multi-Channel High-Speed Counter Installation Instructions - Manual (Page 11)

Multi-Channel High-Speed Counter 11
Publication 1746-IN002A-US-P
Differential Encoder Wiring
(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 300m (1000 ft.).
Differential Encoder Output Waveforms
The figure below shows the different encoder output waveforms. If your encoder
matches these waveforms, the encoder signals can be directly connected to the
associated screw terminals on the module. For example, the A lead from the
encoder is connected to the module’s A+ screw. If your encoder does not match
these waveforms, some wiring modifications may be necessary. See the user’s
manual for your encoder.
A
A
B
B
Z
Z
A(+)
A(–)
B(+)
B(–)
Z(+)
Z(–)
GND
VS
+VDC
COM
Cable (1)
Power
Suppl
Allen-Bradley
845H Series
differential
encoder
Shield
Module Inputs
Earth shield/housing
Connect only if housing is electronically
isolated from the motor and ground.
A
A
B
B
Z
Z