Maximum Cable Length versus
Load Current
Use
to estimate the maximum cable length
relative to the wire size and the load current (in mA) when
wiring inputs and outputs.
Note:
applies to low-voltage (<30V) inputs and
outputs only.
Figure 8: Maximum Wire Length for Low-Voltage (<30V) Inputs and Outputs by Current and Wire Size
SA/FC Bus and Supply Power
Wiring Guidelines
provides information about the functions, ratings,
and requirements for the communication bus and supply
power terminals; and guidelines for wire sizes, cable
types, and cable lengths when wiring the controller's
communication buses and supply power.
In addition to the guidelines in
, observe these
guidelines when wiring an SA or FC bus and the 24 VAC
supply power:
•
Run all low-voltage wiring and cables separate from
high-voltage wiring.
•
All SA and FC bus cables, regardless of wire size,
should be twisted, insulated, stranded copper wire.
•
Shielded cable is strongly recommended for all SA
and FC bus cables.
•
Refer to the
FX-PC Series Controllers MS/TP
Communications Bus Technical Bulletin
(LIT-12011670)
or
to the MS/TP Communications
Bus for BCM System Technical Bulletin
(LIT-12011908)
for detailed information about wire
size and cable length requirements for the SA and
FC buses.
16
FX-PCG16 General Purpose Programmable Controller Installation Instructions
