Product Overview

The Foxboro FBM202 provides specialized thermal measurement for the I/A Series and Foxboro Evo Distributed Control Systems (DCS). This 100% Brand New original input module features 8 channel-isolated inputs specifically designed for thermocouple and millivolt (mV) signals. By converting low-level thermal voltage directly into digital process data, the FBM202 eliminates the need for external signal transmitters. Its rugged design ensures precise temperature monitoring in high-stakes environments such as petrochemical reactors, power plant boilers, and industrial furnaces, where accurate thermal data drives process safety and efficiency.

Technical Specifications

Engineering Advantages

• Total Signal Integrity: The FBM202 employs galvanically isolated channels. This architecture prevents common-mode noise and ground loop currents from distorting sensitive thermocouple signals. Even if a field-side electrical surge affects one thermocouple, the remaining seven channels continue to report accurate data without interference.

• Direct Thermocouple Interface: This module supports a wide variety of thermocouple types directly. It performs cold-junction compensation and linearization internally, significantly reducing the complexity of field wiring and eliminating the cost of purchasing and calibrating intermediate 4-20mA transmitters.

• Redundant System Availability: You can configure the FBM202 in redundant pairs within the 3500 rack or I/A series baseplate. The system automatically switches to the standby module if the primary unit detects a hardware failure, ensuring the control processor never loses critical temperature data.

• Harsh Environment Resilience: A factory-applied G3 conformal coating protects the internal circuitry from the corrosive effects of sulfur, moisture, and chemical vapors. The module thrives in unconditioned field enclosures, maintaining its 16-bit precision even during extreme ambient temperature fluctuations.

FAQs

• Does the FBM202 perform internal cold-junction compensation?

  Yes. When used with the appropriate Termination Assembly (TA) that contains a Cold-Junction Reference (CJR), the module automatically compensates for temperature variations at the terminal connection to ensure absolute accuracy.

• Can I mix thermocouple types on a single FBM202?

  While the hardware supports various types, you typically configure the module software to a specific thermocouple type per module or per group. Consult your Foxboro configuration software for specific channel-level flexibility.

• What is the primary difference between FBM202 and FBM211?

  The FBM202 is specialized for low-level Thermocouple and mV signals with 8 isolated channels. The FBM211 is a higher-density 16-channel module primarily designed for standard 4-20 mA current loop inputs.