Given a ERR board labeled AC/DC commander. Am I safe to connect it as described in the AC/DC manual or are their other differences? No need to fry anything that does not need frying.
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The AC/DC Commander comes in two flavors, one for DC motors and one for AC motors. If it has a large square bridge rectifier between the driver triacs, it's for DC motors, if that bridge rectifier is not there, it's for AC motors.
AC Commander
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@gunrunnerjohn posted:The AC/DC Commander comes in two flavors, one for DC motors and one for AC motors. If it has a large square heatsink between the driver triacs, it's for DC motors, if that heatsink is not there, it's for AC motors.
I think you mean bridge rectifier, not heat sink.
Also, your picture of the DC Commander is actually a picture of a Cruise Commander.
That's what happens when you hurry. 
I couldn't find a picture of the DC Commander, so I had to ad-lib. I removed that image so as not to confuse and corrected my description.
OK so what rectifier can I add to one to use for dc motors??
You can't, the firmware on the board is different, if you have the AC model, it's forever the AC model.
The firmware is the same on the AC Commander and the DC Commander. You can add a 8Amp Bridge rectifier to the AC Commander and make it a DC Commander.
The Bridge is a PB-6 package type.
Well, that's new news, thanks Jon! I stand "sit" corrected. 
