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Main => Main Forum => Topic started by: unclet on October 05, 2003, 02:08:45 pm

Title: Wire color for parallel cable pinout?
Post by: unclet on October 05, 2003, 02:08:45 pm

I am using 25-pin parallel cables to wire up my cab.  I cut one cable in half and I was assuming there would be 25 wires inside (one for each pin) but there are 36 wires total (18 pairs of wires).  

I am trying to figure out which colored wires map to the 25 pins of my cable.   I searched online but could not find any pictures or information which will tell me the color -> pin mapping for a 25pin parallel cable.

Will someone please post this mapping for me?

Thanks

Title: Re:Wire color for parallel cable pinout?
Post by: dhansen on October 05, 2003, 02:21:44 pm

You really don't need to know the pin outs, just make sure that whatever you hook to P1 button 1, P1 button 2, etc.  hook to the same colors on the other end.  I started mapping out all the pins with my multimeter when I thought...duh...you don't need to do this!

Title: Re:Wire color for parallel cable pinout?
Post by: unclet on October 05, 2003, 02:41:29 pm

Good point...... however, which 25 wires (out of the 36 total wires inside the cable) are actually wired to the 25 pin of the cable?   I would not want to use the 11 wires which are not really connected anywhere ...
correct?

Title: Re:Wire color for parallel cable pinout?
Post by: Radical on October 05, 2003, 02:43:12 pm

It does matter if you plan on using the end connectors and not just the wires though.

That would be the Centronics interface (36-pin).  Lots of stuff on the 'Net.  Look here (http://www.connectworld.net/centronics.html).   You can compare those pin-outs to the standard parallel port (http://www.connectworld.net/ieee1284.html).

I could be wrong but as far as I know there is no standard for the colors of the wires inside.  Depends on the manufacturer.   You'll have to test which pin goes to which color.

Edit:
I just looked at the bottom of the Centronics page and see they have the 25-pin mapping right there.

Title: Re:Wire color for parallel cable pinout?
Post by: SirPoonga on October 06, 2003, 01:08:37 am

Quote from: Radical on October 05, 2003, 02:43:12 pm

That would be the Centronics interface (36-pin).

No, it wouldn't.  Centronics is the printer end.  He's probably using the db25 parallel port end.

Wire color is not standard on it like ethernet.  Just get a continuity tester (batter, wire, and a light bulb) and figure out the wires.

Title: Re:Wire color for parallel cable pinout?
Post by: Radical on October 06, 2003, 08:28:34 am

Quote from: SirPoonga on October 06, 2003, 01:08:37 am

No, it wouldn't.  Centronics is the printer end.  He's probably using the db25 parallel port end.

Since he mentioned he's looking at 36 wires, yes, those are from the 36 wire centronics interface.  Doesn't matter which end you're looking at.

Title: Re:Wire color for parallel cable pinout?
Post by: SirPoonga on October 06, 2003, 01:21:50 pm

oh, there it is, I only saw the two times he mentioned 25.

Oh, then you aren't going to have much luch using the centronics end of a printer cable.