Foxboro FBM218 Redundant‑Ready HART Communication Output Interface Fieldbus Module

Technical Specifications

Model:FBM218(P0922VW)

Brand:Foxboro

System compatibility:I/A Series DCS Compact‑200‑series fieldbus I/O subsystem,works with FCP/FCM controller,hot‑standby redundant pair with FBM215 on adjacent baseplate slots,requires redundant adapter,matched with Compact‑200‑series baseplate and corresponding termination assembly and pre‑terminated cable assembly

Function:Compact‑form‑factor redundant‑ready per‑channel galvanic‑isolated HART‑capable analog output fieldbus module,functionally identical to FBM215,8‑channel 4‑20.4mA analog output for HART valve positioners and current‑input actuators,per‑channel independent HART FSK modem for bidirectional instrument communication,D/A conversion,supports HART universal and common‑practice commands,burst mode not supported,max two HART digital messages per‑channel per second,configurable rate‑of‑change‑limit and fail‑safe output‑state parameters,automatic primary‑backup switch‑over upon primary module fault without process‑loop interruption

Installation:Compact‑200‑series baseplate‑mount installation,only compatible with Compact‑200‑series baseplate,FBM215 and FBM218 occupy two adjacent slots with redundant adapter,share one common field termination assembly

Output channel:8‑channel 4‑20.4mA analog output,true per‑channel galvanic isolation,max 550Ω field load resistance per‑channel,output short‑circuit current limited to approx 25mA

Circuit feature:High‑precision D/A conversion,per‑channel over‑voltage‑over‑current protection,output‑loop fault detection,complies with HCF_SPEC‑54 HART physical‑layer standard,1200 baud half‑duplex HART communication

Feature:Support hot‑swap online replacement without subsystem power‑off,redundant 2Mbps fieldbus communication with FCP/FCM controller,hardware‑level hot‑standby redundancy,per‑channel isolation eliminates cross‑channel ground‑loop interference,compact mechanical outline for cabinet space‑saving deployment

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

Power supply:24VDC via Compact‑200‑series baseplate backplane,typical power consumption ≤7W

Protection:Transient surge absorption for each signal channel

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:‑20℃ ~ +70℃

Storage temperature:‑40℃ ~ +85℃

Relative humidity:5%‑95% non‑condensing

Weight:0.284kg

Dimensions:45mm ×104mm ×114mm

Certification:CE,UL

Built‑in function

FBM218 redundant‑ready HART analog output module acts as hot‑standby backup for FBM215 within Foxboro I/A‑Series DCS critical‑loop applications. It converts DCS control commands to 4‑20mA analog output and supports HART digital bidirectional interaction with field smart valve positioners. True per‑channel galvanic‑isolation avoids cross‑channel ground‑loop interference. When primary FBM215 fails,FBM218 automatically takes over without loop interruption. Hot‑swap supports online replacement of faulty module without system shutdown,widely applied for valve‑position‑control‑loop maintenance in petrochemical,chemical and power‑plant facilities

Product Brief

FBM218(P0922VW) belongs to Foxboro I/A Series legacy DCS Compact‑200‑series‑redundant‑per‑channel‑isolated‑HART‑analog‑output spare‑part family,obsolete original compact‑form‑factor redundant‑ready 8‑channel HART‑communication‑output‑interface module component. Must pair with FBM215,Compact‑200‑series dedicated baseplate and redundant adapter. Widely used for original Foxboro DCS equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation