Standard pin-out for DC on a 4 pin XLR?

[thenewyear]

Hi Geekslutz,

Is there a standard for DC power running on the 4 pin XLRs you see on so much broadcast gear?

I checked the PAG site but couldn't find it.

Any help gratefully appreciated.

[Matt Syson]

Hi
Probably not although pin 1 is most likely ground or 0 Volts. The pin usually connects first as the pin / socket is extended.
AMEK used:
1= ground
2 = Pos 17 Volts
3=Neg 17 volts
4= 48 volts
Good luck
Matt S

[thenewyear]

Thanks for the info Matt,

is pin 1 extended on a standard Neutrik 4 pin XLR?? Or is it the socket contact that is further forward that the rest?

Thanks,

[Matt Syson]

Hi
I think it is mainly the sockets with extended pins but there may be the odd ones somewhere. In any case since it is pretty standard to have pin 1 as ground on an 'XLR' it is good to stick to it, although there may be discrepancies between Chassis and 0 Volts. A balanced Dynamic mic for example the pin 1 is a 'chassis safety connection' as it is not actually contributing to the signal. It gets horribly messy from there on!
Matt S