P0902XB FBM42 I/O Interface Module

The Foxboro P0902XB, designated as the FBM42, is a High-Power Contact/DC Expansion Input/Output Interface Module for the I/A Series Distributed Control System (DCS). It provides 8 isolated digital input channels and 8 isolated digital output channels with high-current switching capability, specifically engineered for driving external loads requiring up to 2.25 A per channel . As an expansion module, the FBM42 connects to the redundant Fieldbus via a supporting main module, extending the system’s discrete I/O capacity without consuming an additional Fieldbus connection. It is widely deployed in oil and gas, chemical processing, and power generation facilities for high-power discrete signal management and actuator control .