Foxboro FBM202 Thermocouple Millivolt Input Fieldbus Module

Technical Specifications

Model:FBM202

Brand:Foxboro

System compatibility:I/A Series DCS legacy FBM fieldbus I/O subsystem

Function:8‑channel galvanically isolated temperature input fieldbus module,acquires thermocouple and millivolt sensor signals from field‑side temperature transducers,hardware cold‑junction compensation via termination‑board RTD sensor,sigma‑delta A/D conversion,configurable integration‑time parameters

Installation:Baseplate‑mount installation,mated with dedicated FBM baseplate and matched termination assembly

Input channel:8‑channel thermocouple / millivolt differential input,channel‑to‑channel galvanic isolation

Circuit feature:Sigma‑delta high‑precision A/D conversion,hardware cold‑junction compensation,per‑channel over‑voltage protection,sensor open‑circuit detection

Feature:Support hot‑swap online replacement without subsystem power‑off,redundant 2Mbps fieldbus communication with FCP/FCM controller

Diagnostic:Front‑panel multi‑color LED indicators for power and fieldbus communication status

Power supply:24VDC via FBM baseplate backplane

Protection:Transient surge absorption for each signal terminal

Environmental standard:Compliant with ISA‑S71.04 Class G3 industrial atmospheric condition

Housing:Aluminum alloy metal housing,slot‑in mechanical locking structure

Protection class:IP20

Horizontal operating temperature:0℃ ~ +60℃

Vertical operating temperature:‑20℃ ~ +85℃

Storage temperature:‑40℃ ~ +85℃

Relative humidity:5%‑95% non‑condensing

Weight:1.00kg

Dimensions:36mm ×128mm ×144mm

Certification:CE,UL

MTBF:>83000 hours

Built‑in function

FBM202 temperature input module converts thermocouple and millivolt sensor signals to digital process data for Foxboro I/A‑Series DCS system. Hardware cold‑junction compensation ensures accurate thermocouple temperature measurement. Channel‑by‑channel galvanic isolation effectively suppresses ground‑loop interference inside instrument cabinet. Open‑circuit detection quickly identifies broken sensor‑wiring faults. Hot‑swap supports online module replacement without system shutdown,widely applied for furnace,heater and reactor temperature‑monitoring‑loop maintenance in petrochemical,chemical and power‑plant facilities.

Product Brief

FBM202 belongs to Foxboro I/A Series legacy DCS temperature‑input spare‑part family,obsolete original baseplate‑mount thermocouple‑millivolt acquisition module component. Must match with corresponding FBM baseplate and termination assembly. Widely used for original Foxboro DCS equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation.