Nikki Denso NPSA-15NN-61 Y Axis Driver

Nikki Denso NPSA‑15NN‑61 is a high‑torque servo drive controller used for precision motion in industrial automation. Common failure modes for this class of drives include power supply voltage sag, overheating of the IGBT module, and loss of communication with the host PLC or encoder due to faulty signal lines. Begin troubleshooting by verifying that the input DC rail meets the specified 400 V ±5 % and that the AC mains is stable; then check all I/O connectors for continuity and inspect the board for burnt components or cracked solder joints. Finally, review any diagnostic LEDs or error codes displayed on the unit’s front panel to pinpoint the exact fault.[oss-gpt-20b]

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