It undertakes centralized signal scheduling, remote I/O rack data collection, bus communication coordination and basic logic pre-processing between the main control cabinet and distributed remote I/O stations. Adopting multi-layer high-temperature resistant FR-4 industrial PCB and full closed electromagnetic shielding layout, it is equipped with 1000V AC/DC galvanic isolation between external field bus ports and internal logic circuits, effectively resisting strong electromagnetic interference from high-voltage equipment, frequency converters and large rotating machinery in thermal power, petrochemical and metallurgical sites.Every MRC board undergoes 72-hour high-low temperature cycle aging, full bus communication continuous load testing, remote rack redundant switching simulation and comprehensive hardware fault detection before factory delivery. It supports single-slot hot-swappable backplane plug-in without overall system shutdown, and integrates multi-stage surge suppression, overvoltage, overcurrent, reverse polarity and short-circuit protection circuits. Equipped with dedicated LED indicator lights for power supply, main bus link, remote channel communication and hardware fault alarm, it supports rapid on-site troubleshooting and maintenance, greatly improving the expandability and continuous operation stability of multi-station distributed DCS systems, reducing unplanned production downtime and maintenance labor costs.

Traditional thermal power plant Ovation WDPF DCS distributed control systems, multi-area petrochemical process remote I/O control cabinets, metallurgical factory distributed production monitoring stations, large municipal wastewater multi-station control systems, pulp & paper factory whole-plant remote signal acquisition racks, heavy industry early-generation multi-rack distributed DCS central control rooms, energy chemical continuous production process remote monitoring automation platforms