User Manual

Assembly and Installation
Chapter 3
326
Figure 3.24
Attaching
Filed W iring Arms
Wiring Arm
Horizontal Bar
Remove
Install
CShaped
Bracket
10842I
Field W iring Considerations
When planning duct layout, the following categories of wires and cables
associated with an A-B Programmable Controller should be considered:
I/O Power Cable carries regulated 5V to the Processor and the I/O Rack.
Data Highway Cables (Serial Communication) carry data transmissions
between Processors and/or Computers.
Low Level DC I/O lines carry low voltage low per signals and their input
circuits have short time constant filters so that short pulses can be detected.
Low Level DC I/O lines connect TTL, Analog, Encoder/Counter, Pulse
Output, Fast Response, Thermocouple and other Low Level DC I/O
Modules.
AC I/O lines and High Level DC I/O lines have a greater degree of noise
immunity than Low Level DC I/O lines.