Emerson 1000554 serial communication interface board, dual isolated RS232/RS485 channels, supports Modbus RTU/ASCII protocol, data gateway for DCS connecting third-party equipment, spare part for industrial automation control system.

Product Overview

• Part No: 1000554
• Brand: EMERSON

• Category: Dual Channel Serial Communication Interface Board 1000554 is a plug-in serial communication interface board developed for Emerson distributed control system. It acts as protocol gateway to realize data exchange between main control system and external field devices including third-party PLCs, online analyzers, variable frequency drives and legacy instruments. Equipped with two electrically independent serial channels, each channel can be configured as RS232, RS422 or RS485 communication mode. The board supports Modbus RTU and Modbus ASCII mainstream industrial protocols, and allows flexible configuration of baud rate, data bit, parity and stop bit parameters. Built-in optoelectronic isolation effectively suppresses common-mode interference from field wiring. Comprehensive hardware self-diagnosis function monitors communication status and circuit faults in real time. It serves as essential maintenance spare for petrochemical, power plant and water treatment automation system transformation and expansion projects.

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Core Features

• Two independent electrically isolated serial communication channels
• Software configurable interface: RS232, RS422 full-duplex, RS485 half-duplex
• Native support for Modbus RTU / Modbus ASCII communication protocols
• Adjustable baud rate ranging from 300bps to 115200bps
• Optoelectronic isolation between backplane and serial signal circuits, anti-surge protection
• Real-time communication fault detection and built-in self-test function
• Onboard status LED indicators for channel communication activity and error alarm
• Standard plug-in design matching system backplane for convenient replacement

• Rugged industrial hardware suitable for long-term 24/7 continuous operation under complex electromagnetic environment

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Technical Specifications

• Serial Channels: 2 isolated communication ports
• Supported Interface Standards: RS232, RS422, RS485
• Communication Protocols: Modbus RTU, Modbus ASCII
• Isolation Voltage: 2500 Vrms
• Power Supply: Powered via system backplane
• Operating Temperature: -20°C ~ +70°C
• Storage Temperature: -40°C ~ +85°C
• Mounting: Plug-in installation on DCS system rack backplane

• Protection Class: IP20 when installed inside control cabinet

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Compatibility & Application

• Compatible with Emerson corresponding DCS rack and main controller hardware
• Widely deployed in thermal power plants, petrochemical, oil & gas and water treatment industries
• Applied for data interconnection between DCS system and third-party PLC, gas analyzers, motors drives and legacy serial instruments