I am trying to connect a 21" LED Display driver's input pins to my power board. There is a datasheet also but it doesn't have the input pin diagram. Therefore, I have got the below attached input pin diagram from the Chinese manufacturer.
The things that I have understood by looking at pinout and datasheet of LED Display driver's is that on/off control takes 5V and that brightness takes the PWM input.
The questions I have in mind is:
Which ground is for which voltage. Does both 12V have common ground and the ground for on/off is separate.
Will the system still work if I don't give the adj brightness (PWM input) input? I just quickly want to test it, so will the brightness default to a certain value or is it necessary to connect the adj.
Will the on/off take 5V momentarily like a switch or do I need to supply constant 5V to keep the display on.
Input pin specs: