Anyone ever attempted to power up and test a plc2 or plc5 communication card or otherwise using a power supply attached to the PCB edge? I haven't been able to find the specific voltage used or pins used to do this without a chassis/backplane. This is basically just for experimentation purposes, I could spend 40-50 for an 1771-A1B off ebay, but if I can save 50, then I'll save 50.