This module is designed to convert internal digital control commands from the MRC master board into contact switching signals via on-board isolated relays, used to drive field solenoid valves, lighting indicators, alarm horns, small contactors, equipment interlock loops and auxiliary actuators. Each channel adopts independent optocoupler pre-isolation + relay double isolation design, completely eliminating cross-channel interference and ground loop coupling noise. The module carries comprehensive intelligent diagnosis logic, detecting relay contact adhesion, output loop open circuit, overload short circuit and inductive load back-EMF abnormal signals, and uploads real-time fault alarms to the DCS host controller through MRC Link differential bus.
Compared with G01 basic version, G02 upgrades high-reliability industrial-grade signal relays with longer mechanical and electrical service life; optimizes multi-stage surge absorption and freewheeling protection circuits for inductive loads such as coils and valves; enhances EMC anti-interference performance under strong electromagnetic industrial environment; expands fault diagnosis coverage and improves response speed of output state feedback, suitable for frequent switching and high-reliability interlock control scenarios.
The circuit board adopts multi-layer high-temperature resistant FR-4 industrial PCB with 360° full-surround electromagnetic shielding layout. Every output channel realizes 1000V AC/DC reinforced galvanic isolation between field wiring terminals and internal logic circuits, effectively isolating surge, high-frequency electromagnetic radiation and back electromotive force generated by motors, high-voltage switch cabinets and large rotating equipment in thermal power, petrochemical, metallurgical heavy industry sites. All finished modules pass strict full-lifecycle factory reliability verification: 72-hour high-low temperature cyclic aging test, full-channel relay pull-in/break calibration, long-duration full-load bus communication burn-in test, relay contact wear and loop short-circuit comprehensive fault simulation test.
It supports single-slot hot-swappable online replacement without powering off the entire remote I/O station. Each output channel integrates multi-layer integrated hardware protection: surge suppression, overcurrent cut-off, reverse polarity prevention, inductive load freewheeling protection, overload self-locking protection to avoid module damage caused by field wiring faults. Independent LED diagnostic indicators separately display power supply status, MRC bus communication link status, real-time relay output on/off status and single-channel loop fault alarm information for fast on-site inspection and troubleshooting.
Technical Specifications
PCB Substrate: Multi-layer high heat-resistant FR-4 industrial printed circuit board
Operating Temperature Range: -25℃ ~ +75℃
Storage Humidity: 5% ~ 90% RH, non-condensing
EMC Compliance: Industrial Class II, CE certified, compliant with EN 61000 series anti-interference standards
Communication Bus: Dedicated MRC Link differential bus for Ovation remote I/O racks
Channel Isolation Withstand Voltage: 1000V AC/DC galvanic isolation per independent relay output channel
Output Type: Isolated mechanical relay contact output; supports AC/DC small load drive for field interlock equipment
On-board Integrated Protections: Surge suppression, overcurrent protection, reverse polarity prevention, inductive load back-EMF absorption, overload self-locking protection
Installation Mode: Single-slot hot-swappable plug-in module matched with standard Ovation DCS rack backplane
Quality Warranty: Genuine original Emerson/Westinghouse product, equipped with independent factory inspection test report, 12-month official warranty
Application Fields
Medium and super-large thermal power plant Ovation WDPF distributed control systems, petrochemical plant process valve interlock control cabinets, metallurgical furnace auxiliary equipment logic drive stations, municipal waste incineration flue gas baffle and alarm control systems, pulp & paper production line auxiliary actuator control racks, multi-rack redundant central control rooms of heavy industry, safety interlock and auxiliary equipment logic automation platforms for energy & chemical continuous production lines, centralized monitoring and control systems for large-scale energy storage power stations
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