I'd guess a minimum of 31 racks, and if you need more, you probably should consider a different product line (or adding an opto-splitter).
What need does a 1.2kW dimmer fulfill that a 20A doesn't?Well, I have to have 1.2kW dimmers, or else I would use the Sensor line.
Chase, it's a little more complicated than that. From DMX512 - AusChristmasLighting Wiki :DMX is limited to 32 devices.
Node Limit
The RS485 standard specifies the maximum number of nodes (dimmers, controller, etc) you can have in a single DMX chain. This is specified as 32 "load units". Traditionally, one RS485 receiver (sometimes referred to as a DMX chip) was equivalent to one "load unit". This meant that you could have 31 receivers in the chain, as the transmitter also counts as a unit.
Newer variants of the venerable MAX485 IC have a load rating of 1/4 or 1/8. This means that you can use 4 or 8 times as many of them on a single line. In practice it is best to assume that each device still represents one load unit, as there is no easy way of knowing without checking the IC type and looking up its data sheet.
Please note that this node limit applies to each single DMX chain. On an active splitter, each output is independent and capable of driving another 31 load units (the splitter counts as one).
Chase, it's a little more complicated than that.
At the beginning of this thread I looked for 10A Sensor modules, and all I found was the L10 Dual 10A Low Wattage Dimmer Module. Would that be the proper one, or is there an undocumented D10 or D10AF? Previously, an ETC spokesperson has commented that there's virtually no cost savings associated with using less than 20A modules.alternatively you could load up a sr-6 with 10 amp dimmer modules ...
206.67A per leg. But remember, you don't HAVE to feed the dimmer rack with its full faceplace rating. See NEC 2011 520.27(C), and also the article at http://www.controlbooth.com/wiki/Collaborative+Articles:Dimmer+feeds--How+much+power+is+enough ....210A per phase?
This one would be 48 10A dimmers. And yes, they already have the 6 40A three phase breakers already in place.
Yes, I would like to know if there is a 10A module. I kind of took jm's word for it since he works for the ETC power up guys down here.
I have another project where 10A modules in a Sensor rack would be great (it has several 225A three phase breakers already in place).
We are in the prime renovation season. New installs begin in January.
ok. I has read somewhere on here that it was limited to 32 (from JD I think) but I didn't know there was any chips that could allow you to have more then that.
As you can see, even off the shelf equipment allows for almost unlimited data loading using "star" topology. Only single runs with standard chips have the limit.
Yeah, shoe boxes are completely out of the question. That is why I am looking at SmartPacks.
I am not talking about 40A outlets, I am talking about 40A 3 phase breakers.
There can be an advantage to using 10A dimmers in a Sensor. For example in the other project I have 225A to power 60 odd circuits. So being able to put 10A modules in a Sensor rack would be perfect. I don't want to use 20A dimmers because then there would be a chance of pulling too much power through the system.
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