Allen-Bradley 1746-P2 power supply testing

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this may not be the right forum for you.
Try MR.PLC or PLC.NET

I like this one best
http://www.mrplc.com/
It has a topic just for AB.
Back to your power suppy, do you have the instructions? Mount it a rack with no I/O and measure the voltage
 
as a practical matter you cannot effectively test them.

you can do as another poster suggested and plug it in a rack and measure the voltage on the back plane, but it may not mean all that much. these power supplies have a bit of a history of intermittent failures. If you suspect the power supply has an issue, your best bet is to just replace it.
 
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