One had a plug that output DC power. One had a plug that output AC power.
Oh, man, that reminds me of how I found out that MicroLogix PLCs[0] come in AC flavors and DC flavors. So the MicroLogix 1400 I had lying around here used an AC adapter, and you screwed the stripped wires into the holes that used screw retainers. Easy-peasy, just make sure the adapter's not plugged in in you wire it up. The boss orders me another MicroLogix 1400 for long-forgotten reasons, and to get it bootstrapped, I decided to use the adapter from the other 1400.
I already gave away the plot in the first sentence, and you can guess what happened next.
Oh, man, that reminds me of how I found out that MicroLogix PLCs[0] come in AC flavors and DC flavors. So the MicroLogix 1400 I had lying around here used an AC adapter, and you screwed the stripped wires into the holes that used screw retainers. Easy-peasy, just make sure the adapter's not plugged in in you wire it up. The boss orders me another MicroLogix 1400 for long-forgotten reasons, and to get it bootstrapped, I decided to use the adapter from the other 1400.
I already gave away the plot in the first sentence, and you can guess what happened next.
[0] https://en.wikipedia.org/wiki/Programmable_logic_controller