Foxboro FBM216b I/A Series HART Analog Input Module

Foxboro FBM216b I/A Series HART Analog Input Module

Configured for 4-20 mA analog signal processing and bidirectional field communications in Foxboro I/A Series, DCS, and Evo platforms, the Foxboro FBM216b (FBM216 HART Communication Redundant Input Interface Module) provides direct physical/electrical execution across process control networks.

Hardware Specifications

4-20 mA HART Loop Protocol & Channel-to-Channel Isolation

The FBM216b integrates eight dedicated HART FSK modems operating at 1200 baud to manage bidirectional data throughput with field instruments compliant with HART versions 5, 6, and 7. Channel-to-channel galvanic isolation eliminates ground loops and cross-channel electrical interference across high-density I/O racks. When installed as a redundant pair (P0927AJ), one module operates as the primary Master while the secondary acts as the Tracker, maintaining real-time database synchronization via the standard fieldbus backplane to execute bumpments and bumpless failover under operational fault states.

Frequently Asked Questions

Q: How does the FBM216b module maintain redundancy during operational execution?

A: A redundant pair of FBM216b modules interfaces via the termination assembly. One module acts as the active Master, driving field processing, while the second module runs in Tracker mode to maintain synchronized state memory for continuous execution if the Master faulted.

Q: What power parameters does each channel provide to active field transmitters?

A: Each channel delivers an isolated 24 VDC supply with a minimum loop compliance voltage of 18.5 VDC at 20.5 mA, incorporating internal current-limiting and voltage-regulating protection circuits.

Field Installation Guidelines

Engineers must verify proper DIN rail securing or rack alignment prior to mating the FBM216b with its designated baseplate interface. Ensure all field wiring routes through the compatible termination assembly using twisted-shielded pairs for HART communication lines. Connect cable shields to a single-point earth ground terminal at the cabinet entry to maintain common-mode noise rejection. Never plug or unplug module interfaces without verifying baseplate retaining screw engagement to prevent connector pin damage.