Foxboro FBM242 P0971HX I/A Series Discrete Output Module

Foxboro FBM242 P0971HX I/A Series Discrete Output Module

The Foxboro FBM242 P0971HX, also cataloged as the FBM242 Discrete Output Module, operates as a dedicated hardware component for driving field solenoids, contactors, relays, and actuators within Foxboro I/A Series and Foxboro Evo platforms.

Hardware Specifications

Channel-to-Channel Isolation & Galvanic Loop Protection

The FBM242 P0971HX provides 600 VAC galvanic isolation across all 16 discrete channels and module ground, preventing ground loop formation and transient voltage spikes from migrating into the system backplane. Designed for high inductive field loads, each channel handles up to 8 A inrush currents for 20 ms while maintaining an on-state voltage drop of 0.2 V or less at full load. Redundant 2 Mbps fieldbus communication interfaces ensure seamless data transfer with Field Control Processors (FCP), supporting per-channel configurable fail-safe fallback modes and sustained or momentary signal execution.

Frequently Asked Questions

Q: How does the FBM242 P0971HX handle high inductive loads such as heavy-duty field contactors?

A: Each channel features a transient inrush tolerance of up to 8 A for 20 ms at 30 deg C, allowing the module to switch inductive loads without tripping overcurrent protection limits.

Q: Can the FBM242 P0971HX switch higher AC field voltages?

A: Yes. While the module directly outputs 15 to 60 VDC using an external power supply, connecting the unit to compatible Foxboro termination assemblies enables control of 120 VAC, 125 VDC, and 240 VAC external switching circuits.

Field Installation Guidelines

Engineers must snap the FBM242 P0971HX securely onto its designated modular baseplate until the locking tab engages fully. Route all field wiring to the corresponding external termination assembly, ensuring signal lines remain isolated from high-voltage AC distribution power cables to minimize EMI coupling. Field wiring must utilize external fusing matched to the specific load requirements, not exceeding the 2.25 A maximum channel boundary. Connect all cable shields to a dedicated, low-impedance cabinet earth ground bus before powering the module's 24 VDC auxiliary loop supply.