Foxboro FBM231 Field Device System Integrator Module Four Serial Ports Redundant

Foxboro FBM231 Field Device System Integrator Module Four Serial Ports Redundant

Description FOXBORO FBM231

The FBM231 Redundant Field Device System Integrator (FDSI) modules provide a serial interface between dual-ported field I/O devices and the EcoStruxure™ Foxboro™ DCS system. A pair of FBM231 modules combine to provide redundancy at the Fieldbus Module (FBM) level, with field wiring to two termination assemblies (see Figure 1). In this configuration, one FBM231 is the Master, and the other is the Tracker module. Input points on the control station are updated from the device inputs received on the network connected to the Master. Device output points, depending on the I/O driver, are written by both the Master and Tracker module. Role switching is automatic if actual problems are detected (for example, heartbeat) by the I/O driver, or the user can switch the roles at any time via SMDH. The FBM231 has four ports - each can be individually configured in software for RS232, RS422 or RS-485. This allows a single FBM231 the flexibility to connect to multiple similar but not identical devices. Ports 1, 2, 3, and/or 4 can be configured as a single logical port with redundant cables allowing you to interface with dual-ported I/O devices within your plant. The general network configurations are shown in Figure 1. The FBM231 and its associated termination assemblies (TA) accommodate several types of connections to dual-ported devices; direct connection to devices; connection to modems when used with the RS-232 communication interface, and multidrop connections to RS-485 devices. Intrinsic safety devices can be connected between the TA and the field device. For single ported devices, you should use the FBM230.

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