Foxboro FBM214b Individually‑Isolated HART Communication Input Interface Fieldbus Module

Technical Specifications

Model:FBM214b(P0927AH)

Brand:Foxboro

System compatibility:I/A‑Series DCS Compact‑200‑series fieldbus I/O subsystem,works with FCP/FCM controller,redundant‑pair counterpart FBM216b,matched with corresponding termination assembly and pre‑terminated cable assembly

Function:Compact‑form‑factor 8‑channel per‑channel galvanic‑isolated HART‑capable analog input fieldbus module,each channel accepts 4‑20.4mA analog signal or HART FSK digital signal superimposed on current loop,per‑channel dedicated HART modem for bidirectional communication with HART smart transmitters,sigma‑delta A/D conversion,supports HART universal,common‑practice and device‑specific commands,mixed access of conventional 4‑20mA instruments and HART instruments,configurable integration‑time and rate‑of‑change‑limit parameters,per‑channel isolated loop‑supply capability

Installation:Compact‑200‑series baseplate‑mount installation,mated with dedicated compact‑series baseplate and matched termination assembly

Input channel:8‑channel 4‑20.4mA analog input,per‑channel galvanic isolation(differ from group‑isolated FBM214),nominal channel input impedance 61.9Ω,minimum total loop resistance 280Ω per channel

Circuit feature:Sigma‑delta high‑precision A/D conversion,per‑channel over‑voltage‑over‑current protection,sensor open‑circuit detection,complies with HCF_SPEC‑54 HART physical‑layer standard,max two HART digital messages per‑channel per second

Feature:Support hot‑swap online replacement without subsystem power‑off,redundant 2Mbps fieldbus communication with FCP/FCM controller,can pair with FBM216b for redundant hot‑standby configuration,compact mechanical outline for cabinet space‑saving deployment

Diagnostic:Front‑panel multi‑color LED indicators for power and fieldbus communication status,HART device diagnostic data and channel fault status passed to DCS system

Power supply:24VDC via compact‑200‑series baseplate backplane,power consumption ≤3W typical

Protection:Transient surge absorption for each signal channel

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

Protection class:IP20

Horizontal operating temperature:‑40℃ ~ +70℃

Storage temperature:‑40℃ ~ +85℃

Relative humidity:5%‑95% non‑condensing

Weight:0.32kg

Dimensions:45mm ×110mm ×115mm

Certification:CE,UL

Built‑in function

FBM214b compact HART analog input module acquires 4‑20mA analog process values and HART digital diagnostic‑parameter data from field smart transmitters for Foxboro I/A‑Series DCS system. Different from group‑isolated FBM214,it adopts true per‑channel galvanic‑isolation architecture to eliminate cross‑channel ground‑loop interference. Independent per‑channel HART modem realizes bidirectional interaction with HART instruments without extra external multiplexer. Sigma‑delta conversion guarantees high‑precision analog‑value acquisition. Open‑circuit detection quickly identifies broken field‑wiring faults. It can form redundant hot‑standby control‑loop together with FBM216b. Hot‑swap supports online module replacement without system shutdown,widely applied for pressure,tank‑level and flow‑smart‑transmitter‑loop maintenance in petrochemical,chemical and power‑plant facilities.

Product Brief

FBM214b(P0927AH) belongs to Foxboro I/A Series legacy DCS compact‑200‑series per‑channel‑isolated‑HART‑analog‑input spare‑part family,obsolete original compact‑form‑factor 8‑channel HART‑communication‑input‑interface module component. Must match with Compact‑200‑series dedicated baseplate and matched termination assembly. Widely used for original Foxboro DCS equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation.