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Question about DMX controllers. Answered

Hi
okay, this may seem like an over complicated question but here goes, Can dmx rgb led controllers that have ethernet connectors be connected to the controller by a ethernet switch?

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steveastrouk
steveastrouk

8 years ago

No, just because something has an RJ45 connector doesn't automatically make it ethernet !

DMX travels on RS485 protocols.

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frollard
frollard

Answer 8 years ago

+1

If it is an ethernet>>dmx bridge that connects to a tcp/ip network via ethernet and enunciates on the network as a device for max/msp to connect to -- maybe...but often times they just use the rj45 jack because it's ubiquitous and cheap.

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electroniccrazy
electroniccrazy

Answer 8 years ago

Hi
well this is the controller that i will use for the led's: http://www.holidaycoro.com/3-Channel-DMX-RGB-Controller-with-Power-over-CAT5-p/30.htm

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frollard
frollard

Answer 8 years ago

http://www.holidaycoro.com/3-Channel-DMX-RGB-Controller-with-Power-over-CAT5-p/30.htm

The very first video on that page shows a screencap of the bottom of the device.

It's 8 wires on ethernet, and they are using 6 for power, 2 for DMX (+ and -).

No, this is Absolutely, Positively not compatible with a cat-5 ethernet network. If you plug it in, terrible things could happen to your equipment.

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steveastrouk
steveastrouk

Answer 8 years ago

+LOADS. As I said IT AIN'T ETHERNET.

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thegeeke
thegeeke

Answer 8 years ago

I have seen controllers that can be controlled by ethernet though... and it is actual ethernet. (But if it is sending DMX signal over that jack, then you are correct... it isn't ethernet.) ;)

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steveastrouk
steveastrouk

Answer 8 years ago

If it does use ethernet, it can't be called DMX !!!

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thegeeke
thegeeke

Answer 8 years ago

Controlled by ethernet... as in a small HTTP server embedded into the controller. Mostly used in architectural lighting. Heck... I even saw a really old one that could be controlled over the phone by connecting it to an RJ-11 line. Very limited capabilities, but it's out there.

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steveastrouk
steveastrouk

Answer 8 years ago

...Then it isn't a "DMX interface" is it ? Its HTTP over ethernet, but it ain't DMX.

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thegeeke
thegeeke

Answer 8 years ago

Ahh... yes... I just saw the controller he is talking about... never mind. Seeing as I usually use ION boards... I always forget about these cheap little things. ;)

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steveastrouk
steveastrouk

Answer 8 years ago

;-)
I bow to your superior knowledge of all (other) things lighting, but I have designed and built DMX interface systems for laser lighting rigs, from the raw silicon, when DMX was little more than a twinkle in the ESTA standard makers eyes....So I knows it ain't ethernet !

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thegeeke
thegeeke

Answer 8 years ago

Yep... you're right. :)

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steveastrouk
steveastrouk

8 years ago

The whole point of going for a cheap option like RJ45 is it allows you to make daisy chains VERY easily, and with a cheap crimping tool, over standard twisted pair cable, or, in a permanent installation, you get the whole theatre blitzed with a structured wiring system.

It tells you on the product pages to buy their splitter boxes, for 1.15 USD, to let you daisy chain them, without soldering.

You can even BUY premade CAT5 leads for pennies.

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thegeeke
thegeeke

8 years ago

What controller is it, and what is the function of the port?

It is rare, but I have seen DMX controllers with a small HTTP server in them for controlling over ethernet. If that is the function of the port, then yes... you can use a switch. More common is that it uses a RJ45-DMX converter, in which case the answer is no, you can not because it is not TCP/IP based. (And you need a MAC address to use a switch.)

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electroniccrazy
electroniccrazy

Answer 8 years ago

What i really need is a way to connect loads of these without soldering lots of rj45 jacks together

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thegeeke
thegeeke

Answer 8 years ago

Don't bother soldering it... it will not work. You are thinking of analog... DMX and ethernet are digital. If you need to split the signal, you need an isolated splitter. If it's sending DMX over ethernet, good luck finding it... for DMX I've only seen 3-pin and 5-pin isolated splitters.

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electroniccrazy
electroniccrazy

Answer 8 years ago

No, because these controllers are designed to have multiple controllers working on one system because each one has its own dmx address

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thegeeke
thegeeke

Answer 8 years ago

More than likely you are supposed to daisy chain them... that's how most DMX works. What controller are you using? If I know exactly which one it is, I might be able to help you out more.

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thegeeke
thegeeke

Answer 8 years ago

Just saw the one you are talking about... I am pretty sure you are supposed to daisy chain it.