Wiring Your I/O Modules
Recommendations for Wiring The following are general recommendations for wiring I/O devices.
ATTENTION: Before you Install and wire I/O devices, disconnect
power from the controller and any other source to the I/O devices
Use acceptable wire gauge - The I/O wiring terminals are designed to accept
#14 or smaller AWG stranded wires, and two wires per terminal (maximum)
Maximum torque .9 Nm (8 In-lb).
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
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 (RTB) if you have not already.
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
Capacitors on input modules have a stored charge that can cause a
non-lethal shock If you mount the controller in a position where
installation or service personnel would be in danger from startle
reaction, attach warning labels that are provided.