Technical Specifications Module Type: Redundant‑Capable Multi‑Port Serial Communication Module Port Quantity: 4 serial ports Supported Physical Interfaces: RS‑232, RS‑422, RS‑485 Communication Interface: Redundant I/A fieldbus Operating Power: 24 VDC Operating Temperature: 0 °C to +60 °C Storage Temperature: −40 °C to +85 °C Relative Humidity: 5%‑95%, non‑condensing Mounting: DIN‑rail baseplate installation Certifications: CE industrial redundant communication module compliance
Functional Features Four independent serial ports support multiple serial physical‑layer standards. Supports module‑pair redundant deployment for uninterrupted serial communication service. Fully configurable serial communication parameters including baud rate, parity check and data format. Built‑in link fault diagnosis function reports serial‑port communication abnormal events. Redundant I/A fieldbus guarantees reliable data exchange with field control processor. Hot‑swappable module structure for convenient on‑site hardware replacement.
Application Scenarios Used in petrochemical and power‑plant DCS systems. Applied for high‑reliability data interaction with third‑party serial devices including remote monitoring units, analytical instruments and external control systems.
Structural Characteristics Compact 200‑series rugged modular housing. Gold‑plated bottom connector for electrical connection with DIN‑rail baseplate. Front‑panel LED indicators for power, bus communication, serial‑port and redundancy‑status display. Matches special termination assembly with DB‑25 and screw terminals for multi‑type serial‑device connection。
Working Principle FBM231 exchanges data with field control processor through redundant fieldbus. It converts internal fieldbus protocol data into serial signal format and transmits to external field devices, meanwhile receiving and parsing response data from serial equipment.
Installation Requirements Install supporting baseplate on standard 35 mm DIN‑rail inside control cabinet. Insert FBM231 onto baseplate and lock mechanical buckle. Complete field serial‑device wiring to matched termination assembly ports and terminals. Connect redundant fieldbus cable between baseplate and field control processor. Configure serial‑port parameters and redundancy settings in DCS configuration software after power‑on.
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