Rockwell Automation 1747-ACNR15 ControlNet Adapter Module User Manual - Manual (Page 123)

Publication 1747-UM003A-EN-P
Understanding Your SLC 500/1746 Control System B-31
Wiring the I/O Modules The following are general recommendations for wiring I/O devices.
Use acceptable wire gauge - The I/O wiring terminals are designed to accept
two wires per terminal (maximum) of the following size wire:
•
Europe: 2mm
2
cross section or smaller
•
United States: 14 AWG or smaller stranded wires
Label wires - Label wiring to I/O devices, power sources, and ground. Use tape,
shrink-tubing, or other dependable means for labeling purposes. In addition to
labeling, use colored insulation to identify wiring based on signal
characteristics. For example, you may use blue for dc I/O wiring and red for ac
I/O wiring.
Secure wires - Route the wires down and away from the module, securing them
with the cable tie.
Bundle wires - Bundle wiring for each similar I/O device together. If you use
ducts, allow at least 5 cm (2 in.) between the ducts and the controller so there
is sufficient room to wire the devices.
Identify terminals - Terminal cover plates have a write-on area for each
terminal. Use this area to identify your I/O devices. Label the removable
terminal block if you have not already.
ATTENTION
!!!!
Before you install and wire I/O devices, disconnect power
from the controller and any other source to the I/O devices.
ATTENTION
!!!!
Calculate the maximum possible current in each power and
common wire. Observe all local electrical codes dictating
the maximum current allowable for each wire size. Current
above the maximum ratings may cause wiring to overheat,
which can cause damage.
Capacitors on input modules have a stored charge that can
cause a non-lethal shock. Avoid mounting the controller in
a position where installation or service personnel would be
in danger from startle reaction.