Communications bus and supply power terminal blocks, ratings, and requirements - 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

Brand
Facility Explorer
Product name
FX-PCX27 Expansion Input/Output Module
Document type
Installation Guide
Document number
Part No. 24-10144-173
Document revision
G
Revision date
2019-03-22
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 Recommended 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 recommended.

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

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)

SAP WR on SA Bus: 15 VDC power lead connection.

Note: The SA PWR terminal on an FX-PCX37 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 an FX-ZFR /ZFR Pro Wireless Router

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

Bluetooth Commissioning Converter retractable cable or 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

(Isolated from all other Common terminals on expansion module.)

Note: See Table 1 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) .