Foxboro FBM201B 0‑100mV Analog Input Fieldbus Module

Technical Specifications

Model:FBM201B

Brand:Foxboro

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

Function:8‑channel galvanically isolated analog input fieldbus module,acquires 0‑100mV low‑level millivolt signals from strain‑gauge sensors,thermocouple conditioned outputs and other low‑voltage field transducers,sigma‑delta A/D conversion,configurable integration time and rate‑of‑change limit parameters

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

Input channel:8‑channel 0‑100mV DC analog input,channel‑to‑channel galvanic isolation,high‑input‑impedance for millivolt signal measurement

Circuit feature:Sigma‑delta high‑precision A/D conversion,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

FBM201B millivolt analog input module converts low‑level 0‑100mV sensor signals to digital process data for Foxboro I/A‑Series DCS system. Channel‑by‑channel galvanic isolation effectively suppresses ground‑loop interference inside instrument cabinet. High‑impedance input circuit guarantees accurate millivolt‑range signal acquisition. Open‑circuit detection quickly identifies broken sensor‑wiring faults. Hot‑swap supports online module replacement without system shutdown,widely applied for strain‑gauge and low‑level transducer‑measurement‑loop maintenance in petrochemical,chemical and power‑plant facilities.

Product Brief

FBM201B belongs to Foxboro I/A Series legacy DCS analog‑input spare‑part family,obsolete original baseplate‑mount 0‑100mV analog‑input 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.