Behringer Eurolight LC2412 Manual Do Utilizador

EUROLIGHT LC2412 User Manual

Dimmerpack

DMX512 input

DMX512 output

Analog 

output 

0-10 V

Analog input

Tape/Send output

Mirror ball

Fog machine

(with 0-10 V interface)

PRO MIXER VMX200

LC2412 rear

0-10 V 

switch 

box

Fig. 8.1: Standard wiring in combination with a dimmer (analog and/or digital control)

In addition to the modern DMX512 interface, you can control your EUROLIGHT 

LC2412’s dimmers using the conventional analog outputs (ANALOG OUT  

(57)

, 

0 - 10 V DC). However, this lets you control only twelve dimmer channels plus two 

special channels (only “0 Volts” or “10 Volts”).

8.1.1  Controlling analog dimmers via DMX512
What at first seems like an error is in reality a very useful feature: By using a 

so-called demultiplexers (demux), you can convert digital commands into analog 

and therefore control your analog dimmer packs.
The advantage of such a configuration is apparent: you can address the 

demultiplexer freely, that is, it can for example begin with channel 12 and 

therefore convert control commands from console channels 13 - 24 into analog 

signals (DMX channel 0 is controlled one-to-one by console channel 1 and so on, 

hence the numbering offset). Furthermore, you need only short multicores for 

analog control, since you can arrange the demultiplexer near the dimmers and 

send control commands via a single DMX line.

8.2.1  Digital control features
The EUROLIGHT LC2412 features a modern digital interface according to the 

DMX512 Digital Data Transmission Standard For Dimmers And Controllers, that was 

established in April 1990 by the USITT Engineering Commission (United States 

Institute for Theatre Technology, Inc.). Since virtually all modern equipment uses 

this standard (even if it is done with partially different plug-in connectors), your 

EUROLIGHT LC2412 is therefore extremely flexible in how it can be implemented.
A big advantage of digital control is its enourmously simplified cabling, since you 

only need one single cable for transmitting control data. This sets the DMX 

system apart from its analog conterparts, which need an extra control cable for 

each individual channel. Another big advantage is made possible by the freely 

addressable receivers, which is done by menas of software. You can therefore 

save yourself from having to painstakingly lay cables each time you wish to 

assign a particular dimmer to a different channel. Additional information on this 

subject can be found in chapter 8.2.2.

Interface format (EIA-485)
The DMX512 standard uses the RS485 interface standard for data transmission, 

well-known for its impunity to interferrence. The data are serially transmitted in 

the asynchron fashion at a transmission rate of 250 kBit/s, successively for each of 

the connected dimmers (up to 512 channels). The more dimmers are connected, 

the longer the time interval until the next command on this channel.

In combination with the DMX512 standard, you can run up to 32 loads on a single 

sender (LC2412). One load responds to one DMX512/RS485 receiver, for example, 

the way it is implemented in a dimmer pack.
If you wish to run more than 32 loads, we recommend using level translaters 

and/or signal splitters. 

8.2.2  Assigning DMX channels (Softpatch)
Softpatch means: you can assign up to three freely selectable DMX channels to a 

console channel.

To make the capabilities of the DMX512 as well as the capabilities of the LC2412 

transparent, we have to draw a clear distinction between three different kinds 

of channels:

Console channels
The channels of your LC2412 (= 24+2 channels) are 26 routes through which you can 

send commands. This in no way means that you can only control 24 lighting elements.

Dimmer channels (Dimmer Loops)
Dimmer packs represent the power section of a light control system, comparable 

to power amplifiers of a PA installation in the audio field. Each dimmer channel 

is assigned to one DMX channel, that is, it can receive commands from only one 

channel. For example, if a dimmer loop can handle a maximum power rating of 

2.3 kW, you can connect several lamps, spotlights and similar (e.g. 4 x 500 W).