Why you need a dmx terminal in series dmx 512 led lighting?

June 24, 2021

Because DMX512 protocol usually uses 485 differential signal transmission, based on EIA-485, the transmission distance can theoretically reach 1200m, and it is recommended to control it within 800m. If you want to extend the transmission distance, you need to consider a repeater. The termination method of the DMX512 data link should eliminate signal loops and signal reflections, otherwise it may cause misoperation of a correctly designed system.

Therefore, a terminal resistance can be connected to the end interface of the lamp to make the DMX signal more stable and reduce the deviation. The function of the terminal resistance can eliminate the signal reflection. The DMX512 standard requires that the terminal resistance should be placed between the data + and data-signal pins, with an impedance range of 120Ω+5%~120Ω-10%.

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