Behringer Eurolight LC2412 Manual De Usuario

EUROLIGHT LC2412 User Manual

DMX channels
A DMX channel consists out of one digitally transmitted information unit 

(1 Byte/8 Bit), whereas 256 different information units can be transmitted. 

These units are transmitted sequentially, that is, channels 0 and upwards 

on the sender are accounted for, and the respective information units are 

assigned. The sequence then starts anew at the next channel. In the worst-case 

scenario (all 512 channels are in use) the refresh rate has the value of 44.1 Hz. 

You can derive from this that it is advisable to only use as many channels as you 

actually need.
Since there are 24 channels with adjustable illumination (to each of which 3 DMX 

channels can be assigned), there is a total of 72 DMX channels that can be laid 

out. Additionally, there are two special channels, each of which can switch a 

maximum of 2 DMX channels on and off. 
To assign the desired DMX channels to individual console channels (or to preview 

the assignment of channels), go through the following steps:
1.  Press the UTILITY 2 key.

Fig. 8.2: Display “DMX Patch 1”

2.  Select “DMX PATCH” using the SOFT A key.

Fig. 8.3: Display “DMX Patch 2”

The console channel is shown in the top left portion of the menu. 

The connected DMX channels are shown to its right  (standard setting 

is 1:1. Example: Console channel 01 is connected to DMX channel 000, 

console channel 08 is connected to DMX channel 07, etc.).
The DMX channel is shown in the lower left line; its status is shown next to it 

(NU = Not Used or USE 1...512). In our example DMX channel 000 is connected to 

console channel 01.
3.  Use the Flash keys to first select the console channel to which you wish to 

assign a DMX channel (channels13 - 24: switch to upper mode, SPECIAL 1 

(channel 25) and SPECIAL 2 (channel 26) by pressing  

(8)

  and  

(9)

).

4.  Select a DMX channel usign the DATA wheel. 

If this DMX channel is already occupied, this will be shown in the display 

together with the respective console channel number. Select the console 

channel (Flash key), and select “OPEN” (SOFT B key). Start again at step 3. 

Alternatively, you can also select a different DMX channel.

5.  Press the SOFT A key (“CONNECT” option) and connect the console channel 

with the DMX channel. If you wish to connect multiple DMX channels with 

the same console channel, simply select an additional DMX channel and 

proceed with the connection as previously described.

6.  Use the QUIT key to go back to the main menu.

all connections
1.  Perform steps 1 and 2, as described under 8.2.3.
2.  Press the SHIFT key  

(37)

.

Fig. 8.4: Display “DMX Patch 3”

3.  Now, select “ALL CLEAR” using the SOFT B key to disengage all connections. 

Use SOFT A to go back to the standard setting, “ALL 1:1.”

You will need various types of cables for different applications. The following 

illustrations show you how to lay out these cables. Always use only high-grade cables.

The cables should be manufactured according to EIA-485 or EIA-422 

specifications. Using shielded, twisted, double-stranded data transmission cables 

is recommended. For example, these are the same cables used for transmitting 

digital audio data in the AES/EBU format. You can also implement lines with a 

second wire set, used as a replacement in case of a malfunction.
Using high-quality mic cables is also possible, but their length shold be limited to 

500 m due to the high cable capacity near a data line.

Using a termnal resistor at the end of the line is an additional condition needed for 

glitch-free data transmission. To this end, a 120-Ohm resistor is located between 

both conductors (Pin 2 and Pin 3) in an extra connector. Connect this connector 

to the DMX out connector of the last piece of equipment in the DMX chain. 

Shorter connections (up to several meters/roughly 15 ft) do require termination.

9.3.1  DMX512 connections
The DMX512 norm mandates the use of 5-prong XLR connectors. The correct 

layout is shown in fig. 9.1.

1 = Signal common/shield

2 = Data 1 (-)

3 = Data 2 (+)

Pins 4 (data 2 -) and 5 (data 2 +) are not connected (optional use)

Fig. 9.1: 5-prong XLR connector for DMX512 connections