DMXking.com • JPK Systems Limited • New Zealand
0128-700-4.0
21
Q: What is DMX512P? Is this DMX512?
A: Yes and No. Actually, more No than Yes. Someone thought it would be a good idea to use DMX512 signaling for pixel control
but it really makes no sense and creates confusion because it’s not a differential signal like real DMX512. Connect DMX512P pixels
to the Pixel Ports only so the signal levels are appropriate.
Q: How big should my power supply be?
A: It depends on the pixel count, output intensity, and how many pixels will be lit simultaneously. Often power supplies are over
sized when calculations are done assuming all pixels might be on at full intensity. There is no straight answer and per pixel current
consumption should be ascertained from the product datasheet.
Q: Why do my pixels start going pink instead of white further along the strip?
A: What’s happening is the power supply voltage is dropping and generally blue LEDs will drop in current first since they have the
highest forward voltage. This is simply V=IR and different strips will exhibit different results because their conductor resistance
might be higher/lower. By injecting power again (from the same power supply or another power supply) along the strip at intervals
it is possible to mitigate the voltage drop effects. Higher voltage strips/pixels (12V or 24V) are usually less susceptible to color fade
issues.
Q: What happened to the 5V and 12-24V LeDMX4 PRO versions?
A: These have been merged together in the new eDMX MAX product so there is no longer a supply option that works from 5V up
to 24Vdc.
Q: Is it possible to control pixel outputs from DMX512 rather than Art-Net/sACN over the network?
A: Yes but there’s only 1 DMX512 port and thus 1 DMX Universe available so you’re constrained in how many pixels can be
controlled. Of course using Full Mapping mode with >1 Pixel Group size it’s possible to stretch that 1 universe a little further. Just
configure Port A as DMX-In sACN on the same universe you’ve configured a pixel output.
Q: I’m use WS2813 pixels with dual signal wires. What should I connect to the LeDMX4 PRO pixel port?
A: Only the DATA IN wire from the pixel strip should be connect to DA on the LeDMX4 PRO. Do not connect the DATA OUT return
wire to anything.
Q: The power supply I purchased has exposed AC input terminals. Is this safe?
A: No. Unless you are suitably qualified please defer all AC mains wiring to applicable professionals. Safety first.
Q: My question doesn’t appear here.
A: Ask your distributor for technical support. Maybe it’ll appear in the next user manual too.
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