Table 2: Termination details
Type of field
device
Type of
Input/
Output
Termination diagrams
24 VAC Binary
Output (Switch
Low, Externally
Sourced)
RO
24 VAC Binary
Output (Switch
High, Externally
Sourced)
RO
Terminal wiring guidelines, functions, ratings, and
requirements
Input and Output wiring guidelines
Table 3 provides information and guidelines about the functions, ratings, and requirements for the
controller input and output terminals; and references guidelines for determining proper wire sizes
and cable lengths.
In addition to the wiring guidelines in Table 3, observe these guidelines when wiring controller
inputs and outputs:
• 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.
• 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.
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions
14
