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So I received. My BACP DSTR20 and on of the plugs in the back was disconnected. Taking to heart what Steve said in my last post....I don't want to blow things up! So the little 3 part plug has 2 contacts in it(from what I can see). On the board there is a 3 pin spot. So does anyone know the proper orientation of the plug to board? I don't see any diagram or pin out in the manual IMG_20250314_154326.jpg IMG_20250314_154424.jpg
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Why don't you look for the pin one indicator (a little triangle) and match that with the corresponding pin 1 designation on the PCB silk screen?
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Ok that's a good lead, thank youComment
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If the female, plug part, is a mini Molex strip header, the red wire should be Pin-1.
There should be a small arrow or triangle molded into the body of the connector. That will be your Pin-1 mark.
It looks like a 3-position header plug with only two of the terminals connected. The third is just a dummy. You could plug it in anywhere and it wouldn't do anything.
I don't think it's very common to leave the first position to be the non-populated one. Look at the connector from the mating face, that means, when you read left to right like the way you normally read, you'd see Pins 1, 2 and 3 in that order. The non-pop should be the third.
If you look at the socket part with the male pins sticking out, again from the mating face, it should read left to right. The third pin should be a no-connection. They probably left the third pin on for stability. It probably wouldn't do anything. The third pin might be used as a way to switch between circuits but that's not likely. More likely is that pins 1 and 3 are interconnected, meaning that it doesn't matter which way you plug it. Worse comes to worst, the thing just wouldn't work.
Whatever all that BS... I think that the red wire is Pin-1 and it goes on the left side, as you read the board.
The customer can order it whatever way they want. If they wanted to have purple and green wires, placed on opposite ends they could order them that way. I've seen them that way, except orange and yellow. If the customer wants a tiny, little set screw inserted into the third hole, to hold the connector to the board, I've done that, too. Sometimes we fill the last hole with epoxy and cut off one pin on the mating connector. Polarity is foolproof...until somebody finds a stupider fool! Right?
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Thank you Randy
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