DR4 RJ45 to xlr3

[Pyrotech]

I've got to build a cable to connect from the DR4 slave to a 3 pin xlr DMX laser, does anybody know the correct pins please.

 

[Blickensderfer]

XLR Pin 1 (GND) ----> N/C
XLR Pin 2 (-ve) ----> RJ45 Pin 2 (Orange)
XLR Pin 3 (+ve) ----> RJ45 Pin 1 (White/Orange

 

[Pyrotech]

Thanks for that, Its pin 1 that was confusing me....

 

[David_AVD]

DMX (RS485) is a 3 wire connection. XLR pin 1 goes to RJ45 pin 7 & 8.

 

[Pyrotech]

So assuming the patch cable I'm using is correctly wired its Orange and white pin 1 to xlr pin 3
Orange pin 2 to xlr pin 2 , and brown and brown and white pins 7 and 8 to xlr pin 1. and if only 2 wires are used, the connection to pin1 on the xlr will be redundant and have no effect.

and if I build an xlr3 terminator its 120 ohms across pin 2 and 3.

 

[David_AVD]

All 3 pins of the XLR are used:

XLR pin 1 to RJ45 pins 7 & 8 (brown & white/brown)
XLR pin 2 to RJ45 pin 2 (orange)
XLR pin 3 to RJ45 pin 1 (White/Orange)

and if I build an xlr3 terminator its 120 ohms across pin 2 and 3.

Yes.

 

[wjohn]

As long as the cable is T568B standard, T 568A would be green and green/white

 

[David_AVD]

Good call John. I've just added the pinout info to the wiki:
http://auschristmaslighting.com/wiki/index.php?title=DMX512#RJ45_To_XLR_Adapter