What are Art-Net and sACN?

By David / a few months ago

Running DMX signal over ethernet is something that we are going to see more and more of as we move through time.  If you’re not familiar with these protocols yet, watch the video below or read the transcript to get the basics.

Then, join me below the video for a gear guide to Art-Net and sACN nodes:

Transcript

DMX can send up to 512 channels down 1 cable. So what’s a person to do when you need more than 512 channels?

More cables!

As technology moves forward, there becomes more and more the need to send large amounts of DMX channels down

This can make data distribution a nightmare – not to mention costly!

That’s why some really smart people tackled this problem, allowing us to send DMX over ethernet.

This video has been created as a brief overview of the topic. There are a whole lot of details I leave out, keeping only the basics you need to know as an introduction to this topic!

How Does DMX over Ethernet Work?

As of the time of this video, DMX can be sent through ethernet through (2) different protocols – Art-Net and sACN.

Art-Net was devised by Artistic License to solve the 512 channel limit that DMX has. It allows you to send 32,768 universes of DMX data down a single network cable.

The upside? Art-net is supported by more gear and is an older protocol.

sACN stands for streaming Architecture of Control Networks and is also known as E1.31 and was developed by ESTA – the Entertainment Services and Technology Association.

sACN allows you to run 63,999 universes of DMX data down a single network cable.

Both protocols are tested, solid ways to send DMX over ethernet. At the time of this recording, sACN seems to be becoming more popular. but time will tell!

Both protocols use “nodes” to output standard DMX to your lighting. These nodes are all on the same network as your console and can be reconfigured to put out different DMX universes, and multiple nodes can output the same universe.

Some fixtures ARE the node and can take in DMX over ethernet natively, some even outputting regular DMX to other fixtures.

No longer do large DMX systems require massive bundles of DMX cables. The future is here, and if it hasn’t come to your lighting rig yet, it will soon!

Art-Net and sACN Gear Guide:

Now that we’ve got the very basics of Art-Net and sACN down, it’s time to talk gear.  There are a TON of nodes on the market, but how do you know which node is right for you?

Like anything in our world of lighting, there are cheap nodes, middle of the road nodes, and expensive, professional-grade nodes.

But just like an LED par can or moving light, there are drastic differences between the cheap units and the quality units that you should consider before buying:

Build Quality

You may not need the “like-a-tank” build quality of the most expensive nodes, but cheaping out can give you poor results as well.

For example, there are a number of cheap, imported nodes that feature thin plastic casings and cheap RJ-45 or XLR connectors for DMX output – so, if you’re not going to baby your gear, you probably want to pass them up.

Higher quality nodes are also going to feature great quality power supplies and components – and carry the warranty to assure you they won’t give up during your show or service! (and if they do, they’ll be replaced)

Ease of Use

Many (but not all!) Art-Net and sACN nodes allow you to configure them remotely via a web browser or application, making it easy to change settings on the gig.

You’ll find that cheap units require you to dial up their IP address directly, while nicer units will have a computer application that can search out and find the nodes on your network automatically, then configure them via an easy-to-use interface.

Features

Feature-wise, most Art-Net/sACN nodes are able to output either protocol and are able to assign each universe you desire to any of the ports.  Most nodes also support the ability to take DMX-in, though some require you to use a turn-around adapter.

Where the professional-grade units take a step above the cheap guys is in the ability to setup merging and different DMX refresh rates.  These features can save your show!

You’ll also notice that higher quality units are going to use high-quality connectors (very important for reliability!), and often feature the Neutrik EtherCON connector for the Ethernet, which is much more durable than the standard RJ-45 plug.

Power over Ethernet (POE) is a handy feature available on some nodes, and this allows you to literally power your node via ethernet – no external power needed.  To make this work, you’ll either need a router or switch that provides POE or a POE injector.

Customer Support

Have you ever had a problem with a piece of gear and needed to call or contact customer service?  I’ve called and emailed a LOT of different companies over time, and I can tell you that there is a HUGE difference between different brands.

Companies like Enttec, Chauvet and Elation have been around for a long time, and have amazing customer support.  When you have a problem, whether it’s the gear’s fault of your fault, they’ll walk you through the steps to get your gear working correctly…and that alone is worth the slight increase in price over the “no-name” brands!

What Node Should I Buy?

Now that we’ve covered both how Art-Net and sACN work, and some of the differences between different levels of gear, it’s time to talk specific pieces of gear!

Now, as always, the gear I feature here is a sample of great pieces of gear from companies I trust.  There are other brands out there, and surely are other other options which are good which I don’t cover here.  (There are a lot of cheap, poor quality units too – so be careful!)

How Many Universes of Node Output Do I Need?

You’ll need (1) universe of node output for each DMX universe that you need to convert out of Art-Net or sACN.

Many consoles can output a certain number of DMX universes via the “back panel” of the console, and then addition via Art-Net/sACN, so you may not need a node for each DMX universe in your show.

Any node can be configured to output any universe – so you may have multiple nodes outputting the same universe to different sections of your lighting rig – it’s all understanding and planning out what you need before you buy!

Entry-Level: 1-2 Universe Nodes

Enttec ODE

The Enttec ODE is one of the most popular single-universe nodes out there for good reason – it’s well-built, easy to configure and supports merging as well as DMX-input.

It however, does not support sACN at this point, but most consoles and software allow both Art-Net and sACN, making this a non-issue if you just need 1 universe of DMX over Ethernet.

All Enttec nodes, including the ODE, are configurable via Enttec’s NMU software.

There is also a POE version of the ODE here, which allows you to power it via Ethernet.

Enttec Ethergate MK3

The Ethergate MK3 is Enttec’s 2-port node that supports Art-Net and sACN.  Similar to the ODE, the Ethergate MK3 supports merging, DMX input, and can be rack-mounted via a kit.

 

Chauvet DMX-AN

Chavuet’s DMX-AN is a low-cost node that offers basic functionality.  It can speak Art-Net and sACN, but only offers 3 pin DMX – to get 5-pin, you’ll need an adapter.

Configuration via web browser is available, however there is not a network management program like Enttec offers.

I haven’t had a chance to get my hands on one yet, but when I do I will update this post accordingly.

4-Port Nodes:

Elation eNode 4

Elation’s eNode 4 is one of the most popular 4-port nodes out there because it offers Art-Net and sACN, and 4 universes of output is perfect for Martin M-PC, Chamsys and other PC version consoles.

 

The eNode 4 however, is not configurable from a computer, but does offer the ability to do merging.

8 Port and Larger Nodes:

Enttec Storm 8 and Storm 24

Enttec’s Storm series nodes are some of the most cost-effective nodes available on the market, while still keeping the high quality we love from Enttec.  They feature everything you’d expect from Enttec – DMX input, merging and easy configuration thanks to the NMU software.

Both units are very compact and output DMX via RJ-45 connectors – adapting that to 3 or 5 pin DMX can be done via a very inexpensive adapter.

The Storm 8 offers 8 universes of DMX output, while the Storm 24 offers 24.  If you need more than 4 universes of DMX, the Storm is a great unit!

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