Rockwell Automation 1772-LV,D17726.6.1 A and I MNL MINI-PLC-2/15 PROCESSO - Manual (Page 46)

Assembly and Installation
Chapter 3
3Ć26
Figure 3.24
Attaching Filed Wiring Arms
Wiring Arm
Horizontal Bar
Remove
Install
CĆShaped
Bracket
10842ĆI
Field Wiring 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.