Communications bus and supply power terminal blocks, ratings, and requirements - BCPro - Facility Explorer - CH-PCX2723-0 - Field Device - FX-PCX27 Expansion Input/Output Module

PCX2723 Expansion Input/Output Module Installation Guide

Brand
BCPro
Facility Explorer
Product name
FX-PCX27 Expansion Input/Output Module
Document type
Installation Guide
Part number
24-10143-1116
Document revision
D
Version
Revision date
2020-11-11
Language
English
Table 1. Communications bus and supply power terminal blocks, functions, ratings, requirements, and cables
Terminal block/Port label Terminal labels Function, electrical ratings/Requirements required cable type

FC BUS

or

SA BUS

+

-

FC or SA Bus Communications

FC Bus: 0.6 mm (22 AWG) stranded, 3-wire twisted, shielded cable required.

SA Bus: 0.6 mm (22 AWG) stranded, 4-wire (2 twisted-pairs), shielded cable required.

Note: On the SA Bus, the + and - wire are one twisted pair, and the COM and SA PWR are the second twisted pair of wires.

COM

Signal Reference (Common) for FC or SA Bus communications

SHLD

or

SA PWR

SHLD on FC Bus: Isolated terminal (optional shield drain connection)

SA PWR on SA Bus: 15 VDC power lead connection.

Note: The SA PWR terminal on an expansion module does not supply 15 VDC. The SA bus supervisor supplies 15 VDC to devices on the SA bus requiring power.

SA/FC BUS

(Port)

 

RJ-12 6-Position Modular Connector provides:

FC or SA Bus Communications

FC or SA Bus Signal Reference and 15 VDC Common

Commissioning Converter or ZFR /ZFR Pro Wireless Router

(Maximum total current draw for SA Bus is 100 mA.)

24 AWG 3-pair CAT 3 Cable <30.5 m (100 ft)

24~

HOT

24 VAC Power Supply - Hot

Supplies 20–30 VAC (Nominal 24 VAC)

0.8 mm to 1.0 mm

(18 AWG) 2-wire

COM

24 VAC Power Supply - Common

Note: See Maximum cable length versus load current to determine wire size and cable lengths for cables.
Note: The SA Bus and FC Bus wiring recommendations in this table are for MS/TP bus at 38,400 baud. For more information, 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 Technical Bulletin (LIT-12011908) .