Foxboro FBM20 0‑20mA Analog Input Fieldbus Module

Technical Specifications

Model:FBM20

Brand:Foxboro

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

Function:8‑channel 0‑20mA analog input fieldbus module,collects current signal from field‑side pressure,level,flow transmitters and converts analog process signal into digital data for DCS controller

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

Input channel:8‑channel 0‑20mA analog input,group‑wise galvanic isolation

Circuit feature:High‑precision A/D conversion,input over‑voltage protection,sensor open‑circuit detection

Feature:Support hot‑swap online replacement without subsystem power‑off

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

Power supply:Powered 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℃ ~ +55℃

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

FBM20 analog input module receives 0‑20mA process signals from field transmitters for Foxboro I/A‑Series DCS system. Group‑wise galvanic isolation 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 pressure,tank‑level and flow‑measurement‑loop maintenance in petrochemical,chemical and power‑plant facilities.

Product Brief

FBM20 belongs to Foxboro I/A Series legacy DCS analog‑input spare‑part family,obsolete original baseplate‑mount analog‑input module component. Must match with corresponding FBM baseplate assembly. Widely used for original Foxboro DCS equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation.