SA/FC bus terminal block - 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

An FX-PCX expansion module can be connected to a Sensor/Actuator (SA) bus or a Field Controller (FC) bus, but not to both buses simultaneously. The SA/FC bus terminal block is a removable, 4-terminal plug that fits into a board-mounted jack.

When connecting the FX-PCX to an FC bus, wire the bus terminal block plugs on the expansion module, and the other controllers and expansion modules in a daisy-chain configuration using 3-wire twisted, shielded cable as shown in Figure 1.

Figure 1. FC bus terminal block wiring

When connecting the FX-PCX to an SA bus, wire the bus terminal block plugs on the expansion module and other SA bus devices in a daisy-chain configuration using 4-wire twisted, shielded cable as shown in Figure 2.

Figure 2. SA bus terminal block wiring

Note: The SA PWR/SHLD terminal does not supply 15 VDC. The SA PWR/SHLD terminal is isolated and can be used to connect (daisy chain) the 15 VDC power leads on the SA bus (Figure 2) or the cable shields on the FC bus (Figure 1). The SA bus supervisor supplies 15 VDC to devices on the SA bus requiring power.