FBM201 analog input module

The FBM201 is an analog input module developed by Foxboro for its I/A Series Distributed Control System (DCS). It is designed to acquire, condition, and transmit analog signals from field sensors, serving as a critical front-end component for real-time process monitoring and control in industrial environments. Below is its detailed information:

1. Core Functions

Multi-Type Analog Signal Acquisition: Specializes in collecting standard industrial analog signals, including 4-20mA current signals, 0-10V voltage signals, thermocouple (TC) signals, and resistance temperature detector (RTD) signals. This versatility allows it to interface with various field devices such as pressure transmitters, temperature sensors, and flow meters.
Signal Conditioning & Conversion: Integrates built-in signal conditioning circuits (e.g., cold junction compensation for thermocouples, lead resistance compensation for RTDs) to minimize environmental interference. It converts continuous analog signals into 16-bit digital data, ensuring high-precision transmission to the I/A Series DCS for processing and analysis.
Fault Diagnostics: Monitors module health, power supply stability, and channel integrity in real time. Abnormalities (e.g., signal overload, open circuits) trigger local LED alarms and upload diagnostic data to the DCS, enabling quick troubleshooting.

2. Technical Specifications

Category	Specific Parameters
Input Channels	8 independent differential channels (supports simultaneous acquisition).
Supported Signals	- Current: 4-20mA DC (2-wire/4-wire transmitters)- Voltage: 0-10V DC, ±5V DC- Thermocouples: J, K, T, E, R, S, B, N types- RTDs: Pt100, Cu100 (3-wire/4-wire configurations)
Resolution	16-bit (ensures precise detection of small signal changes).
Accuracy	- For 4-20mA/voltage: ±0.05% of full scale- For TC/RTD: ±0.1°C (typical at 25°C)
Isolation	- Channel-to-channel: 1500V AC (1 minute)- Module-to-backplane: 2500V AC (1 minute)
Power Supply	24VDC ±10% (typical power consumption: ≤4W).
Operating Temperature	-40°C to 70°C (suitable for harsh industrial environments like petrochemical plants, power stations).