FBM24

FBM24 is a 16‑Channel 125 VDC Contact Sense Input Module by Foxboro (Schneider Electric) for the I/A Series DCS. It provides high‑voltage discrete input monitoring for industrial process systems.

1. General Information

Manufacturer: Foxboro (Schneider Electric)

Model: FBM24

Function: 16‑channel isolated discrete input for 125 VDC contact sensing

Mounting: I/A Series baseplate‑mounted

Certifications: CE, ATEX, CSA; Class 1 Division 2 / Zone 2 hazardous areas

2. Key Specifications

Channels: 16 isolated digital inputs

Input Voltage: 125 VDC nominal (contact sense)

Logic Levels:

Logic 1: 90–140 VDC

Logic 0: 0–40 VDC

Isolation: Channel‑to‑channel galvanic isolation

Power: 24 VDC (system‑supplied)

Hot‑Swap: Supported (online replacement without system shutdown)

Operating Temp: -20°C to +70°C

3. Main Features

High‑Voltage Input: Designed for 125 VDC field contact signals, common in legacy process systems.

Channel Isolation: Galvanic isolation between channels prevents cross‑talk and enhances safety.

Hot‑Swap Capability: Enables online module replacement without disrupting field wiring or system operation.

Reliable Sensing: Optimized for contact‑based input devices (e.g., relays, limit switches).

4. Applications

Used in oil & gas, refining, chemical, and power generation industries. Monitors 125 VDC contact outputs from relays, motor control centers (MCCs), switchgear, and legacy field devices in Foxboro I/A Series DCS environments。