4256A25G02 / 1C31025G06 Emerson Ovation WDPF DCS MRC High-Capacity Main Remote Control Board_Ningde Androld Automation Equipment Co.,Ltd.

June 10, 2026

4256A25G02 / 1C31025G06 Emerson Ovation WDPF DCS MRC High-Capacity Main Remote Control Board

4256A25G02 is the legacy Westinghouse drawing part number, while 1C31025G06 is Emerson’s unified aftermarket spare part number; the two codes refer to the same third-generation enhanced MRC (Main Remote Control) master board for Ovation WDPF distributed control systems, fully plug-and-play downward compatible with 4256A25G01/1C31025G03, 4256A25G02/1C31025G04 and 4256A25G05.

Description

This module acts as the core bus master for distributed remote I/O racks, responsible for high-speed bidirectional data exchange, remote rack bus scheduling, analog/digital field signal preprocessing and redundant channel coordination between central control cabinets and multi-group field RIO stations. Compared with earlier G01, G02 standard/stable versions (G04/G05), this G06 variant upgrades main control processor, expands data cache capacity, optimizes bus transmission bandwidth and redundant fault-switching response speed, supporting more remote I/O nodes and larger-scale multi-rack DCS systems, ideal for super-large thermal power and petrochemical integrated control projects.

The circuit board adopts multi-layer high-temperature resistant FR-4 industrial PCB with full enclosed electromagnetic shielding layout. A 1000V AC/DC galvanic isolation barrier is built between external remote bus terminals and internal logic circuits, effectively suppressing electromagnetic interference generated by high-voltage switchgear, frequency converters and large rotating equipment in heavy industrial sites.

Every finished board undergoes rigorous factory validation: 72-hour high-low temperature cycle aging, full-load continuous bus communication burn-in, redundant channel failure simulation and full-channel signal precision calibration. It supports single-slot hot-swappable backplane installation without overall DCS system shutdown, and integrates multi-stage surge suppression, overvoltage, overcurrent, reverse polarity and short-circuit protection circuits. Multiple independent LED diagnostic indicators display power status, main bus link, remote channel running state and hardware fault codes, enabling rapid on-site troubleshooting, greatly improving system continuous operation reliability and cutting unplanned production downtime and maintenance labor costs.

Model Matching & Version Distinction

Legacy Westinghouse part code：4256A25G02
Emerson official spare part code：1C31025G06
Compatibility: Direct replacement for all earlier MRC series without system configuration modification
Series version positioning:
- 1C31025G03: Basic G01 version, small & medium systems
- 1C31025G04: Standard bandwidth G02 version
- 1C31025G05: Enhanced stability G02 mainstream aftermarket version
- 1C31025G06: High-bandwidth large-capacity G02 flagship version for super multi-rack systems

Technical Specifications

PCB Substrate: Multi-layer high heat-resistant FR-4 industrial circuit board
Operating Temperature Range: -25℃ ~ +75℃
Storage Humidity: 5%–90% RH, non-condensing
EMC Compliance: Industrial Class II, CE & LVD certified, complies with EN 61000 series anti-interference standards
Bus Interface: Dedicated high-speed MRC link bus for Ovation remote racks, upgraded transmission bandwidth
Channel Isolation: 1000V AC/DC galvanic isolation between field bus terminals and internal logic circuit
Built-in Protection: Surge suppression, overvoltage, overcurrent, reverse polarity, short-circuit protection
Installation Mode: Single-slot hot-swappable plug-in for standard Ovation DCS rack backplane
Quality Standard: Original Emerson/Westinghouse factory certified; each unit equipped with independent factory inspection test report, 12-month official quality warranty

Application Fields

Super-large thermal power plant Ovation WDPF DCS distributed control systems
Multi-unit integrated petrochemical production remote I/O control cabinets
Full-process metallurgical factory distributed production monitoring stations
Large municipal wastewater multi-station automatic control systems
Whole-factory pulp & paper remote signal acquisition racks
Heavy industry multi-rack redundant DCS central control rooms
Energy chemical continuous production line remote monitoring automation platforms
Large energy storage power station centralized DCS control systems

Contact Info