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RS-422 connection RJ12

I have a generic rs232 to rs422 converter that I need to connect to a daktronics led sign. I need to know if there is a standard pinout for tx/rx when wired through a rj12 6 pin connector

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What I was told through the mfg. was:
pins 1,8 =NC
pins 2,7= Chassis Ground
Pin 3= TX-
Pin 4= TX+
Pin 5= RX-
Pin 6= RX+

This would actually be a RJ45 (8pin) but uses the 6 pin cable and only 4 com wires.
Evidentally there is no standard for the pin usages for serial communications with RJ connectors. So this information might not be valid for other equipment.

Posted on Jan 21, 2009

  • smoovie2003
    smoovie2003 Aug 27, 2012

    Did you manage to connect ? I have a daktronics led sign..about 20 years old ...that i have no clue how to connect to..please help me out... smoovie2003@yahoo.com

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