A quick guide to what you really need to know about DMX512.

• All wiring must be in a continuous run and daisy-chained. No “Tees” are permitted.
• “Stars” are permitted only in conjunction with an opto-splitter.
• Cable shield may be grounded at one end only, preferably at the control console.
• Maximum cable length is 1,800 ft.
• Receiving devices have male connectors, transmitters have female.
• Wire must be  Belden 9829, 9842, Cat 5 or equivalent .
• The last DMX device on the line must be terminated with a termination switch or resistor with a value of 100 to 120 ohms between pins 2 and 3.
• RJ45 connectors may be used with Cat5 cable, for permanent wiring.
• Cat5 UTP cable may be used inside metal conduit. Use Cat5 STP when installed in raceways.