Foxboro FBM207 16-channel DC voltage monitor

The FBM207 is a high-performance discrete input module belonging to the Foxboro Evo™ Process 

Automation System, designed specifically for voltage monitoring applications in industrial settings. As 

a key component of the system, it features 16 independent, galvanically isolated channels, each 

engineered to accept 2-wire input signals from external DC voltage sources.

This module offers versatile voltage compatibility, supporting voltage monitoring at three critical 

industrial levels: 60 V DC, 120 V AC/125 V DC, and 240 V AC. It also functions as a switch input 

module, accommodating external power supplies of 120 V AC/125 V DC and 240 V AC. To match 

different external voltage requirements, the FBM207 must be used with dedicated termination 

assemblies (TAs), which provide essential signal conditioning—including voltage attenuation and 

optical isolation—for input voltages exceeding 60 V DC, ensuring signal integrity and module 

protection.

A standout feature of the FBM207 is its flexible deployment capability: it can operate as a standalone 

unit for standard applications or be configured as a redundant pair for mission-critical control 

schemes. In redundant setups, two FBM207 modules connect to a common termination assembly via 

a redundant adapter on the baseplate, enabling seamless failover. The Foxboro Evo™ Control 

Software’s redundant digital input block validates input signals from both modules and selects the 

highest-quality data for control strategy execution, ensuring uninterrupted operation. Additionally, 

the module’s contact sense power is diode-OR’d in the redundant adapter to maintain reliable 

power redundancy.

Beyond core signal acquisition, the FBM207 integrates multifunctional program execution, supporting 

Discrete Input, Ladder Logic, Pulse Count, and Sequence of Events (SOE) applications with 

configurable Input Filter Time. It handles the necessary signal conversion to interface field sensor 

signals with the redundant 2 Mbps module Fieldbus, facilitating stable communication with the 

system’s Fieldbus Communication Module (FCM) or Control Processor (FCP). Built with industrial 

durability in mind, its rugged design and compatibility with harsh environment (Class G3) enclosures 

make it ideal for demanding industrial control scenarios, delivering consistent performance across 

diverse process automation applications.

The FBM207/b/c modules boast a space-saving compact form factor, paired with a rugged extruded 

aluminum housing that delivers robust physical protection for internal circuit components. Enclosures 

specifically engineered for FBM module installation offer tiered environmental shielding performance

—meeting the requirements of ISA Standard S71.04 and supporting reliable operation even in harsh 

Class G3 industrial environments.