This is the most useful piece of test kit I have ever made! I often have to buzz out RS422 machine controls and since every wireman gets the screens correct (pins 4 & 6 for the Tx & Rx screens) you can rely on them being where you expect. After that it's just a matter of having a 2k, 3k, 7k & 8k resistor on the appropriate pins and you can stick it at the end of the run and see where the pins are missing/swapped over by connecting your multimeter across pins 4 & 6 and the signal pins. I always have one handy (and they often get nicked!)Friday, September 28, 2007
Best RS422 tester EVER!
This is the most useful piece of test kit I have ever made! I often have to buzz out RS422 machine controls and since every wireman gets the screens correct (pins 4 & 6 for the Tx & Rx screens) you can rely on them being where you expect. After that it's just a matter of having a 2k, 3k, 7k & 8k resistor on the appropriate pins and you can stick it at the end of the run and see where the pins are missing/swapped over by connecting your multimeter across pins 4 & 6 and the signal pins. I always have one handy (and they often get nicked!)
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