Product Details:

FOXBORO FBM203B is an 8-channel galvanically isolated wide-range RTD temperature input fieldbus module of FOXBORO Compact 200 I/A Series DCS. It receives resistance signals from 200Ω platinum and 470Ω nickel RTD sensors, supporting 2-wire and 3-wire sensor wiring. The measurement resistance range extends to 0~640Ω, wider than the standard FBM203 model. Every channel adopts independent channel-to-channel isolation and 16-bit sigma-delta ADC to convert resistance signals into temperature data for FCP controller. The PCB uses conformal coating to resist vibration, dust, humidity and electromagnetic interference in harsh industrial environments. It communicates with the controller over redundant 2Mbps fieldbus. Built-in continuous self-diagnosis detects sensor open circuit and short circuit faults, triggers alarms so technicians can quickly locate temperature loop issues. FBM203B supports hot swap and is widely used for DCS maintenance, spare parts replacement and system retrofit projects. Every FOXBORO FBM203B module passes factory testing and calibration before shipment.

Specifications:

Model:FBM203B

Brand:FOXBORO

Product Type:8 Channel Isolated Wide Range RTD Temperature Input Module

System compatibility:FOXBORO I/A Series DCS

Input signal:2/3-wire RTD,0~640Ω,8 isolated channels

Supported sensors:Pt200,Ni470

ADC:16-bit sigma-delta conversion

Communication:Redundant 2Mbps module fieldbus

Redundancy:Support redundant module configuration

Diagnosis:Built-in self-diagnosis,sensor open/short detection

Power supply:24VDC redundant

Hot swap:Supported

Ambient operating temperature:0℃ ~ +60℃

Relative humidity:5% ~ 95%,non-condensing

Installation:Rack card mounting on 200 series baseplate

Environmental grade:G3 harsh environment,conformal coating

FBM203B is the wide resistance variant of FBM203 RTD card, designed specially for Pt200 and Ni470 sensors which have higher base resistance values. Its expanded 0~640Ω measuring range can capture much higher temperature readings compared with standard 0~320Ω RTD modules. It is suitable for high-temperature measuring points on kilns and heat treatment equipment, and is used as spare replacement for legacy I/A DCS systems that adopt Pt200 temperature sensors. Every FOXBORO FBM203B module passes factory testing and calibration to guarantee reliable process control performance.