Issue: The 5 volt supply is taken from an axis port of the MC403 and cable length is >15 meters. After 15-20 days the power supply overloaded alarms comes. After removing and reconnecting the cable, the alarm went away. But after 2-3 days alarm came again, and again removing the cable and reconnecting, the alarm goes.

Sugestions and resolution:

There are 3 possible reasons for this.

1. Something is overloading the 5V output of one or more encoder ports.

2. The RS232/RS485 serial port 5V also comes from the encoder supply, so check for overload on that.

3. It's possible that the MC403 has a fault.