Nikki Denso MCN-1002S2 controller

The Nikki Denso MCN‑1002S2 is a multicom controller rated at 200 VA, operating on 200–220 V AC at 50/60 Hz, commonly used for servo drive and motion control applications. Known failure modes for this class of controllers include power supply degradation (input/output voltage drop), overheating of the internal regulator or MOSFET array, and loss of communication links to slave devices; these often manifest as intermittent operation or error codes on the panel display. First‑check diagnostics: verify input voltage stability with a multimeter, inspect the main power supply board for burnt components or swollen electrolytics, and confirm all I/O connections (digital/analog) are secure and free of corrosion before proceeding to deeper troubleshooting.[oss-gpt-20b]

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