Maximum wire length by current and wire size
figure
Figure 7: Maximum wire length by current and wire size
FC and SA bus and supply power wiring guidelines
Table 5 provides information about terminal block functions, ratings, and requirements.
Table 5 also provides wire size, cable type, and cable length guidelines for wiring the FX-PCV
communication buses and supply power.
In addition to the guidelines in Table 5, observe these guidelines when wiring the SA/FC Buses and
supply power:
• Run all low-voltage wiring and cables separate from high-voltage wiring.
• All FC and SA Bus cables, regardless of wire size, should be twisted, insulated, stranded copper
wire.
• Shielded cable is strongly recommended for all FC and SA Bus cables.
• Refer to the
FX-PC Series Controllers MS/TP Communications Bus Technical Bulletin (LIT-12011670)
for
detailed information regarding wire size and cable length requirements for the FC and SA buses.
15
FX-PCV Programmable Variable Air Volume Box Controllers Installation Instructions
