Doug Fleenor Designs DMXTSTR
DMX512 Line Tester


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The DMX512 Line Tester instantly displays the presence of the +Data and -Data signals when plugged into a DMX control line or feed-through connector. Observing the indicators while fading all the dimmers from zero to full will detect if either line is stuck high. Swapped +Data and -Data lines can be determined by sending all dimmers to full.

Doug Fleenor Designs DMX512 Line Tester Specifications:

  • Connector: 5 pin male or 3 pin male
  • Indicators:
      -  Data + Green T1 light emitting diode(LED)
     -  Data - Red T1 light emitting diode (LED)
  • Effective input impedance: 220 Ohms (each line)
  • Power input: None, draws power from DMX line
  • Color: Silver connector body with white label
  • Size and weight: 1.9" long, 0.8" maximum diameter, 1.5 ounces
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