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  • RS-485 testing

    Hello

    I have a computer with 7 RS-232/422/485 ports. It is not problem to test the RS-232 interface, but how can I test the RS-485 port. Can I connect 2 port together or can I use a loopback connector. If yes, then how should the loop back connector be made?
    I would prefer not to use an external converter if possible.

  • #2
    For 422/485 I would used a RS232 to 485 converter and then use our RS232 loopback plugs.

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    • #3
      Hi,
      we faced the same problem with RS422 and RS485.

      Using RS485 to RS232 converter will not work because RS485 is a kind of none Duplex, you can either send or receive so you'd need a kind of active loopback. BurnIn can't handle that (yet).

      RS422 can work with a dedicated loopback, you need to loop

      TX+ to RX+
      TX- to RX-
      than use BurnIn Test without handshake. If you have RS422 that also has RTS+/- and CTS +/- BurnIn Test can not handle these signals, as it expects also DSR, DTR, RTS Loops.

      Kind Regards
      Malte

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