Hello,

    I've tried to make DMX input circuit like this:


    DMX Direct|  120R    +------+         10K
     XLR pin 3|--\/\/\---|1    5|-------+-/\/\/----VCC
                         | 4N25 |       |
                   +-----|2    4|----+  +----- to 75176 pin 6
    DMX Ground|    |     +------+    |
     XLR pin 1|----+                GND
                   |     +------+    |
                   +-----|2    4|----+  +----- to 75176 pin 7
                         | 4N25 |       |
    DMX Invert|--\/\/\---|1    5|-------+--/\/\/----VCC
     XLR pin 2|  120R    +------+         10K

    But it haven't worked. Maybe the 4n25 is very slow? DMX is 250bps.

    Best regards,

    Brusque