A.1 Pin-Wiring For TP-Cabel and RJ-45

An overview of the wiring variants can be found here:

http://www.1wire.org/media/A_Guide_to_the_1WRJ45_Standard_Draft.zip

Who does not want to struggle through all the variants may use the following universal and sustainable scheme for the RJ45 pin assignment.

Color Specification acc. to:
Pin EIA/TIA 568A   EIA/TIA 568B
1 Green/White Main Supply GND Orange/White
2 Green Main Supply +5V/50mA for 1-Wire Components Orange
3 Orange/White Secondary 1-Wire Bus GND Green/White
4 Blue Primary 1-Wire Bus Blue
5 Blue/White Primary 1-Wire Bus GND Blue/White
6 Orange Secondary 1-Wire Bus Green
7 Brown/White Auxiliary Supply i.e. +12V/200mA for other consumers Brown/White
8 Brown Auxiliary Supply GND Brown


Note: For long busses the ohmic resistance has a negative effect on the supply voltages. Use an application-side power supply to prevent that.

© 2001-2015 The fli4l-Team - 27 January 2015