FBM241C high-density discrete input module

The FBM241C is a high-density discrete input module developed by Foxboro for its I/A Series Distributed Control System (DCS). It is specialized in collecting digital switching signals from industrial field devices (e.g., limit switches, proximity sensors, and equipment status contacts) and transmitting them to the DCS for real-time status monitoring and logic interlock control, making it a core component for discrete signal acquisition in harsh industrial environments. Below is its detailed information:

1. Core Specifications

Input Channels: 16 independent discrete input channels, divided into 4 isolation groups (4 channels per group) for enhanced anti-interference performance.
Supported Input Signals:
- Dry contact signals: Compatible with normally open (NO) / normally closed (NC) mechanical switch contacts.
- DC voltage signals: 15–60V DC (typical application range), with "on" threshold: 11–60V DC and "off" threshold: 0–5V DC.
Input Response Time: ≤1ms (captures transient switching signals such as emergency stop triggers to ensure timely DCS response).
Input Current: ≤10mA per channel (low power consumption, compatible with most field sensors and switches).
Power Supply: 24V DC ±10% (power consumption ≤5W, fully compatible with I/A Series rack power modules like P0916JP).
Isolation Rating:
- Group-to-group isolation: ≥600V AC (1 minute), preventing cross-interference between different signal groups.
- Module-to-DCS backplane isolation: ≥2500V AC (1 minute), effectively suppressing ground loops and electromagnetic interference (EMI).