GE 90-30 Power Supply 321 Models

[TimMcD 0]

I'm a student in a research lab working on getting some test equipment set up. The system has a GE Series 90-30 controller and we have found that our power supply is faulty. PN: IC693PWR321AA. I have been searching around for a replacement and found many parts with PN IC693PWR321 but few with the -AA. Is there any difference between these models that would cause the PLC not to work? (I'm not exceptionally knowledgeable in the PLC area). Thanks!

[Steve Bailey 118]

The characters to the right of the dash are an indication of the revision level of the module. For something like a power supply there won't be any compatibility issues. For modules like the CPU, an older module might not accept a program written for a newer firmware level.

[TimMcD 0]

Thanks for the quick response!