Foxboro FBM221 Multi‑Port Serial Communication Interface Fieldbus Module

Technical Specifications

Model:FBM221(P0917HB)

Brand:Foxboro

System compatibility:I/A Series DCS Standard‑200‑series fieldbus I/O subsystem,works with FCP/FCM controller,matched with Standard‑200‑series baseplate and corresponding termination assembly

Function:Standard‑200‑series multi‑port serial communication fieldbus module,provides four independent galvanic‑isolated RS‑485 serial ports,acts as protocol gateway between I/A‑Series DCS and external field devices,supports Modbus RTU / Modbus ASCII master‑slave mode,each channel works independently,configurable baud rate,parity,stop bit,station address,realizes point mapping data read‑write between DCS database and multi‑vendor instruments,drives,analyzers

Installation:Standard‑200‑series baseplate‑mount installation,mated with dedicated Standard‑200‑series baseplate and matched termination assembly,not compatible with Compact‑200‑series baseplate

Communication port:4×RS‑485,each port galvanic isolated,half‑duplex,baud‑rate 1200‑115200bps

Circuit feature:Opto‑coupler isolation per serial channel,frame check,communication timeout diagnosis,slave‑station fault detection

Feature:Support hot‑swap online replacement without subsystem power‑off,redundant 2Mbps fieldbus communication with FCP/FCM controller,four independent channels expand access capacity of Modbus devices,standard‑200‑series mechanical form

Diagnostic:Front‑panel multi‑color LED indicators for power,fieldbus bus status and each serial port running state,communication error and offline slave‑station alarm transmitted to DCS system

Power supply:24VDC via Standard‑200‑series baseplate backplane,typical power consumption ≤3.5W

Protection:Transient surge absorption for each serial communication 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:‑20℃ ~ +70℃

Storage temperature:‑40℃ ~ +85℃

Relative humidity:5%‑95% non‑condensing

Weight:0.45kg

Dimensions:36mm ×128mm ×144mm

Certification:CE,UL

Built‑in function

FBM221 multi‑port serial communication module serves as multi‑channel Modbus gateway for Foxboro I/A‑Series DCS system. Four independent isolated RS‑485 channels connect multiple Modbus RTU field devices such as frequency converters,analyzers and remote I/O units. Each channel operates separately to avoid mutual interference between different bus segments. Built‑in communication fault diagnosis helps locate bus wiring and slave‑station abnormal issues. Hot‑swap supports online module replacement without system shutdown,widely used for multi‑vendor device access in petrochemical,chemical and power‑plant facilities.

Product Brief

FBM221(P0917HB) belongs to Foxboro I/A Series legacy DCS standard‑200‑series‑multi‑port‑serial‑communication spare‑part family,obsolete original four‑channel RS‑485 gateway module component. Must match with Standard‑200‑series dedicated baseplate and termination assembly. Cannot be interchanged with Compact‑200‑series hardware. Widely used for original Foxboro DCS equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation.