Foxboro FBM203 RTD Input Module – Overview

The Foxboro FBM203 is a high-precision RTD (Resistance Temperature Detector) input module designed for the Foxboro I/A Series Distributed Control System (DCS). It is widely used in industrial automation applications to accurately measure temperature signals from field sensors and convert them into digital data for process control.

Key Features

8 Independent RTD Input Channels
Provides eight fully isolated channels for simultaneous multi-point temperature measurement.
High Accuracy Measurement
Delivers precision up to ±0.03% of span, ensuring reliable temperature monitoring.
Multi-Sensor Compatibility
Supports Platinum, Nickel, and Copper RTDs, including:
- Pt100 (DIN/IEC)
- Ni sensors
- Cu sensors
Flexible Wiring Options
Compatible with:
- 2-wire RTD
- 3-wire RTD
  (4-wire supported in FBM203D variant)
Galvanic Channel Isolation
Each channel is electrically isolated to eliminate ground loops and improve signal integrity.
Advanced Signal Conversion
Uses Sigma-Delta A/D conversion for high-resolution and noise-resistant measurements.

Technical Specifications

Parameter	Specification
Input Channels	8 isolated RTD inputs
Input Range	0–320 Ω (standard FBM203)
Accuracy	±0.03% of span
Sensor Current	~0.19 mA DC
Power Supply	24 VDC
Power Consumption	~3 W
Operating Temperature	–40°C to +70°C
Humidity	5–95% non-condensing
Conversion Method	Sigma-Delta

Functions

Temperature signal acquisition from RTD sensors
Analog-to-digital signal conversion
Data transmission via fieldbus to control processors
Continuous temperature monitoring and alarm support

Applications

The FBM203 module is widely used in:

Oil & Gas / Petrochemical plants
Power generation systems
Manufacturing & industrial automation
Water & wastewater treatment
Pharmaceutical and food processing industries

Advantages

High reliability in harsh environments (G3-rated)
Modular design for easy installation and maintenance
Strong noise immunity (>125 dB common-mode rejection)
Redundant fieldbus communication support

Conclusion

The Foxboro FBM203 RTD Input Module is a robust, high-accuracy temperature input solution for industrial DCS systems. With its multi-channel isolation, flexible sensor compatibility, and precise signal conversion, it is ideal for mission-critical process control applications requiring dependable temperature monitoring.

Foxboro FBM203

Main Brand:

ABB Allen-Bradley Alstom Bently GE MOOG Schneider

Woodward HIMA Honeywell Emerson Foxboro

First hand source, affordable price. Spot inventory!

•Shipping Port: Xiamen

•Ship to you via Fedex/DHL/TNT/UPS/EMS

•Package: Original packing with cartons

Our Main Brand

ABB, GE, Allen Bradley, Honeywell, Emerson, Bently Nevada, Prosoft, Siemens, Westinghouse, Triconex, Foxboro, ICS Triplex, Hima, Schneider, Yokogawa, Woodward, B&R, KEBA, etc

—-(DCS)Distributed Control System

ABB 3AUA0000110429,SYSCON2 746924

Invensys Foxboro FBM214,FBM242,B0123HE

Invensys Triconex 3625,3700A,3604E

Woodword 5462-758B

HIMA F2-DO-16-02,F8650E

Yokogawa SAI143-S03 S1, F9342L-02

Honeywell 51402497-200,51403519-160,51199194-100,CC-PDO801

Emerson KJ4001X1-NB1,12P3368X012

—-(PLC)Programmable Logic Controller

Rockwell AB 1734-IB8,1734-OB8,1769-L18ER-BB1B,1756-IM16I

ICS Triplex T8461,T8850,T8403,T8431,T8831,T8310

Schneider Modicon 140DDI85300

GE Fnauc IS210AEPSG2B,IS220UCSAH1A,IS215ACLEH1A,IS210AEAAH1B

Siemen 6ES7331-1KF02-0AB0

Prosoft MVI46-DFNT

Bachmann MPC240

Woodhead 9905-068 2301A

—-(TSI)Turbine Supervisory Instrumentation

Bently Nevada 3500/22M,138607-01,3500/25,3500/53,3500/32M 149986-02,

EPRO MMS6110,MMS6120,MMS6220,MMS6312,MMS6410,6423,6424,

ENTEK EK C6622HS,XM124,1440-SDM02-01RA

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