Figure 6: 24 VAC supply power terminal block
wiring
Note:
The supply power wire colors may
be different on transformers from other
manufacturers. Refer to the transformer
manufacturer’s instructions and the project
installation drawings for wiring details.
Important:
Connect 24 VAC supply power to
the expansion module and all other network
devices so that transformer phasing is uniform
across the network devices. Powering network
devices with uniform 24 VAC supply power
phasing reduces noise, interference, and
ground loop problems. The expansion module
does not require an earth ground connection.
Terminal Wiring Guidelines,
Functions, Ratings, and
Requirements
Input and Output wiring guidelines
Table 2 provides information and guidelines about
the functions, ratings, and requirements for the
expansion module input and output terminals, and
references guidelines for determining proper wire
sizes and cable lengths.
In addition to the wiring guidelines in Table 2
• Run
all
low-voltage wiring and cables separate
from high-voltage wiring.
• All input and output cables, regardless of
wire size or number of wires, should consist
of stranded, insulated, and twisted copper
wires., observe these guidelines when wiring
controller inputs and outputs:
• Shielded cable is not required for input or
output cables.
• Shielded cable is recommended for input
and output cables that are exposed to high
electromagnetic or radio frequency noise.
• Inputs/outputs with cables less than 30 m
(100 ft) typically do not require an offset in
the software setup. Cable runs over 30 m (100
ft) may require an offset in the input/output
software setup.
IOM3723 Input/Output Module Installation Guide
6