Foxboro FBM203 - 8-Channel Analog Input Module (4-20mA / 0-10V) for I/A Series DCS

Foxboro FBM203 – 8-Channel Analog Input Module (4-20mA / 0-10V) for I/A Series DCS

In stock

Product Introduction:
The Foxboro FBM203 is an 8-channel analog input module for the Foxboro I/A Series distributed control system. The “FBM203” identifies the 8-channel analog input configuration. This module accepts standard process signals (4-20mA current loops and 0-10V voltage signals) from field transmitters measuring pressure, temperature, flow, and level. The module provides 16-bit A/D conversion with high accuracy and excellent noise rejection, making it suitable for precise process control. Each channel is independently configurable for input type, range, filtering, and engineering units. The FBM203 is one of the most commonly used I/O modules in the I/A Series family, found in thousands of installations worldwide.

Technical Specifications:
Board Type: 8-Channel Analog Input Module
System: Foxboro I/A Series DCS
Channels: 8 independent analog input channels
Input Types: 4-20mA (2-wire) or 0-10V (3-wire)
Resolution: 16-bit A/D conversion (65,536 counts)
Accuracy: +/- 0.05% of full scale
Update Rate: 250 milliseconds per channel (simultaneous sampling)
Isolation: 1500V RMS channel-to-channel and channel-to-ground
Filter Time: Configurable from 0 to 10 seconds per channel
Burnout Detection: Automatic detection of open transmitter wires (4mA burnout or 22mA burnout)
LED Indicators: Per-channel green LEDs show input status
Communication: I/A Series UIM/LIM backplane
Power: 5V DC from FBM02 chassis backplane
Form Factor: Eurocard (3U height)
Operating Temperature: 0 to 60 degrees Celsius

Functional Features:
Simultaneous Sampling: All 8 channels are sampled at the exact same instant, preserving phase relationships between signals.
Per-Channel Configuration: Each channel independently configurable for input type, range, engineering units, and filter time.
Burnout Detection: Automatically detects open or shorted transmitter wires and alarms the operator.
High Isolation: 1500V RMS isolation protects the DCS from electrical transients.
Digital Filtering: Configurable digital filter rejects noise and provides smooth, stable readings.
LED Status Indicators: Bright per-channel LEDs allow instant visual verification of input status.
Fail-Safe Output: On communication loss, the module drives the CPU input to a predetermined safe value (typically 0% or 100% of range).