Max wire length by current and wire size graphic
Figure 9: Maximum wire length for low-voltage (<30 V) Inputs and Outputs by current and
wire Size
SA/FC bus and supply power wiring guidelines
Table 5 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 Table 5, 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 ControllersMS/TP Communications Bus Technical Bulletin (LIT-12011670)
or
MS/TP Communications Bus for BCPro System Technical Bulletin (LIT-12011908)
for detailed
information regarding wire size and cable length requirements for the SA and FC buses.
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions
20
