How to fix no power on fx1s-14mr

[huuquyen]

Hello everyone, i got problem with power pcb of fx1s-14mr, when i supply 220vac to plc, but led power did not light, have you ever meet this case and how to solve this case

[Ron_S]

I came across an FX0n that actually had no wires in the 240V ac power terminals and yet the inputs and outputs were working.???

On further investigation there was a separate 24V dc supply unit that was connected to the 24 and 0v terminals of the plc. 

It had worked like this for years. I don't know if the internal 24V dc had failed at some time or it was done from the start - but it worked.

Try this method, it will likely spring back to life.