Foxboro FBM230 - Analog Input Module for Foxboro I/A Series Control Systems

Foxboro FBM230 – Analog Input Module for Foxboro I/A Series Control Systems

In stock

Product Introduction:
The Foxboro FBM230 is a standard analog input module for the Foxboro I/A Series distributed control system. The “FBM230” designation identifies this module as a 16-channel analog input board that accepts 4-20mA and 1-5V signals from field transmitters. This module is one of the most widely used I/O modules in the Foxboro I/A product line, providing reliable, high-accuracy measurement of process variables like temperature, pressure, flow, and level. It features per-channel signal conditioning, cold junction compensation for thermocouples, and burnout detection. The FBM230 is the workhorse analog input module for thousands of Foxboro installations worldwide.

Technical Specifications:
Board Type: Analog Input Module
System: Foxboro I/A Series (Series 1, 2, 3)
Channels: 16 independent analog input channels
Input Signals: 4-20mA, 1-5V, 0-10V, RTD (Pt100, Pt1000, Cu100), Thermocouple (J, K, T, E, N, R, S, B)
Resolution: 16-bit A/D conversion
Accuracy: +/- 0.1% of full scale (4-20mA), +/- 0.05% (RTD)
Cold Junction Compensation: Built-in, high-precision CJC for thermocouple inputs
Isolation: 500V RMS channel-to-channel and channel-to-ground
Update Rate: 250 milliseconds per channel
Burnout Detection: Automatically detects open thermocouple or RTD wires
Voting: 1-out-of-2 or 2-out-of-3 voting with redundant modules
LED Indicators: Per-channel green/red LEDs show input status and fault conditions
Power: 5V DC from I/A Series backplane
Form Factor: 3U Eurocard
Operating Temperature: 0 to 60 degrees Celsius

Functional Features:
Universal Input Support: Accepts every major field signal type (current, voltage, RTD, thermocouple) on the same module, reducing spare parts inventory.
Cold Junction Compensation: Eliminates the need for external CJC modules when using thermocouples, saving rack space and cost.
Per-Channel Configuration: Each channel independently configurable for input type, range, engineering units, and filtering.
Burnout Detection: Automatically detects open sensor wires and alarms the operator immediately, preventing undetected measurement loss.
Self-Calibration: Supports on-board zero and span calibration using a precision voltage source, without removing the module from the rack.
Fail-Safe Output: On communication loss, the module drives the controller input to a predetermined safe value (typically 3.6mA or 21mA).