Communications bus and supply power wiring guidelines - Facility Explorer - Part No. 24-10144-173 - FX-PCX2721-0 - Field Device - FX-PCX27 Expansion Input/Output Module

FX-PCX2721 Expansion Input/Output Module Installation Instructions

Facility Explorer
Product name
FX-PCX27 Expansion Input/Output Module
Document type
Installation Guide
Document number
Part No. 24-10144-173
Document revision
Revision date

Table 1 provides information about the functions, ratings, and requirements for the communication bus and supply power terminals; it additionally provides guidelines for wire sizes, cable types, and cable lengths when wiring the expansion module's communication buses and supply power.

In addition to the guidelines in Table 1, 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 following documents depending on your system (FX or BCPro): FX-PC Series Controllers MS/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.