4256A25G01 (Interchangeable Model: 1C31025G03) Emerson Ovation DCS MRC Main Remote Control Board_Ningde Androld Automation Equipment Co.,Ltd.

June 10, 2026

4256A25G01 (Interchangeable Model: 1C31025G03) Emerson Ovation DCS MRC Main Remote Control Board

4256A25G01 and 1C31025G03 are two part numbers for the same MRC main remote control board under Emerson Westinghouse Ovation WDPF DCS system, fully compatible and interchangeable. 4256A25G01 is the old Westinghouse part code, while 1C31025G03 is Emerson’s unified updated spare part number.

Description

This board acts as the core master controller for distributed remote I/O racks of early Ovation DCS platforms. It takes charge of bidirectional data transmission, bus coordination and signal pre-processing between the central control cabinet and on-site remote I/O stations.

The circuit board adopts multi-layer high-temperature resistant FR-4 substrate with full surrounding electromagnetic shielding design. 1000V AC/DC galvanic isolation is built between external remote bus ports and internal logic circuits to resist heavy electromagnetic interference generated by high-voltage devices, inverters and large rotating equipment in thermal power, petrochemical and metallurgical plants.

Every finished board passes strict factory tests including 72-hour high-low temperature cycle aging, full-load long-time bus communication test, redundant channel switching simulation and full hardware fault detection. It supports single-slot hot-swappable installation on DCS rack backplane without overall system shutdown. Multi-level protection circuits (surge suppression, overvoltage, overcurrent, reverse polarity, short-circuit prevention) are integrated on board. Independent LED indicators display power status, bus connection, remote channel working state and hardware faults for quick on-site troubleshooting. It greatly improves the expandability and long-term stable operation of multi-station distributed DCS systems, cutting unplanned production halt time and maintenance costs.

Key Model Description

Old part No.: 4256A25G01
Equivalent replacement No.: 1C31025G03
Same hardware function, identical installation size and communication protocol, direct swap without system modification

Technical Specifications

PCB Material: Multi-layer high heat-resistant FR-4 industrial circuit board
Working Temperature: -25℃ ~ +75℃
Storage Humidity: 5%–90% RH, non-condensing
EMC Standard: Industrial Grade II, CE & LVD certified, comply with EN 61000 series anti-interference standards
Bus Interface: Special high-speed MRC link bus for Ovation remote racks
Isolation Strength: 1000V AC/DC isolation between field bus terminals and internal logic circuit
Built-in Protection: Surge, overvoltage, overcurrent, reverse polarity, short-circuit protection
Installation: Single slot hot-swappable plug-in for standard Ovation DCS rack backplane
Quality Assurance: Original Emerson certified, each unit with independent factory test report, 12-month warranty

Application Scenarios

Thermal power plant Ovation WDPF distributed control systems
Multi-region petrochemical production remote I/O control cabinets
Metallurgy factory distributed production monitoring stations
Large municipal wastewater multi-station automatic control systems
Pulp and paper factory full plant remote signal acquisition racks
Traditional heavy industry multi-rack DCS central control rooms
Energy & chemical continuous production remote monitoring platforms

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