Troubleshooting Of Remote I/O Stations; The Pw Led Does Not Turn On - Mitsubishi Melsec-L Series User Manual

8.4

Troubleshooting of Remote I/O Stations

This section describes troubleshooting of remote I/O stations.
For troubleshooting of a remote device station, refer to the user's manual for the remote device station used.
8.4.1

The PW LED does not turn on

Check the following:
The communication cable connected to the power supply is
incorrectly wired.
A communication cable is connected to the LINK connector
of the dedicated power supply or power supply adapter.
A 24VDC supply voltage is outside the specified range.
*1 Check for short-circuit, reverse connection, disconnection, and excessive pressure.
*2 Measure a voltage using check terminals on the terminating resistor.
If the PW LED does not turn on even after the above actions are taken, the possible cause is a hardware failure.
Please consult your local Mitsubishi service center or representative, explaining a detailed description of the problem.
Check item
Check terminal 24G
CHAPTER 8 TROUBLESHOOTING
1
Correct the wiring.*
Connect the cable to the LINK/POWER connector.
Reduce the supply voltage within the specified range.
Check terminal 24V
Action
*2
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