Rockwell Automation 1769-HSC Compact High Speed Counter Module - Manual (Page 59)

Rockwell Automation Publication 1769-UM006E-EN-P - July 2013 59
Installation and Wiring Chapter 3
Wire Diagrams
The following pages show wiring examples for a differential encoder,
single-ended encoder, and discrete device.
Inputs
The module utilizes differential inputs. Therefore, two input terminals are
required for each input point. For example, the A0+ and A0- terminals are
required for input point A0. Each input point is isolated from other input points,
the 1769 Compact bus, and the entire output terminal group.
The inputs are compatible with standard differential line driver output devices as
well as single-ended devices such as limit switches, photo-eyes, and proximity
sensors. Examples of differential and single-ended circuits are shown in
Figure 14
and Figure 15 .
Figure 14 - 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 300 m (1000 ft).
A
A
B
B
Z
Z
A1(+)
A1(–)
B1(+)
B1(–)
Z1(+)
Z1(–)
GND
VS
+VDC
COM
Cable (1)
Power
Supply
Allen-Bradley
845H Series
Differential
Encoder
Shield/Housing
Connect only if housing is electronically
isolated from the motor and ground.
Shield
Module Inputs
Earth