Description
FOXBORO P0926GV FBM231
This is an 8-channel thermocouple input module that belongs to the fieldbus module series in the Foxboro I/A Series control system.

Primary Function and Application
Its core function is to convert the weak millivolt (mV) signals generated by field thermocouple sensors into digital signals that the I/A Series control system can recognize and process.
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Signal Input: Receives temperature signals from up to 8 independent thermocouples.
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Signal Type: Supports multiple thermocouple types, such as J, K, T, E, R, S, B, N, C, etc.
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System Role: Acts as the “eyes” of the process control system, used to monitor critical temperature points in industrial settings (e.g., reactors, pipelines, furnaces).
Key Technical Features
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Channel Count: 8 differential input channels.
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Input Type: Thermocouple.
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High Accuracy: Provides high-precision analog-to-digital conversion, ensuring accurate temperature measurements.
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Built-in Cold Junction Compensation (CJC): Each channel has independent cold junction compensation to correct for measurement errors caused by temperature changes at the wiring terminals, a critical feature for thermocouple measurement.
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Open Circuit Detection: Can detect if a thermocouple loop is broken (open) and report the fault to the control system, enhancing system reliability.
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Field Power Isolation: Input channels are electrically isolated from the logic circuits and field power supply, effectively suppressing field noise and ensuring stable operation in harsh industrial environments.
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Status Indicators: The module typically features LED indicators to display module status (e.g., OK, Fault), communication status, and individual channel activity.
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Hot-Swappable Capability: In most I/A Series systems, FBM modules support hot-swapping, allowing for module replacement or maintenance without shutting down the system, significantly improving availability.
Physical Structure and Installation
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Form Factor: A standard FBM module, typically with a rugged metal housing.
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Installation: It must be plugged into a dedicated Field Bus Mounting Base, such as models FBM201, FBM202, etc. The base provides power and communication bus connection to the higher-level controller (e.g., FCP270).
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Wiring: Field thermocouple wires are connected to a Terminal Block Unit associated with the FBM231. This terminal unit then plugs into the front of the FBM module or connects to the base via a cable.
Application Industries
The FOXBORO I/A Series system and its FBM231 module are widely used in process industries that demand high reliability and precision, including:
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Oil & Gas (Refining, LNG)
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Chemical & Petrochemical
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Power Generation (Thermal, Nuclear)
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Pharmaceutical
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Water & Wastewater Treatment
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Pulp & Paper
Sales of the brand:
ABB、EPRO、GE、FOXBORO、Schneider、Rexroth、Honeywell、Bently、YASKAWA other global DCS system and PLC system, servo system of famous industrial brand.
☀️Tara(Sales Director)
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🥇Product Condition: One-year warranty

Company Overview
Main Products
We specialize in supplying original imported spare parts for DCS, PLC, robotics, and large servo systems from leading global brands, including:
- FOXBORO | EMERSON | TRICONEX | XYCOM | BENTLY
- ROCKWELL | ABB | GE | Aen-Brady | YOKOGAWA
- HONEYWELL | RELIANCE | SCHNEIDER | MODICON
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