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LICHTTECHNIK
4.3 Control of light intensity
After warming up, the light intensity of the metal halide daylight-lamp may be controlled
by the dimming potentiometer (stepless). The nominal lamp power can be adjusted
between 50 - 105% (left stop = MIN, right stop = MAX of power).
4.4 Remote Control DMX 512
The Electronic Ballast EB 1200/1800 Event Three can be controlled by a remote control
according DMX-512 standard. The remote control connectors are placed on rear side of
the ballast. The three-digit switch at the front plate is used to select the addresses of the
modules.
Two DMX channels are needed for each module. First channel is used for dimming the
lamp, the second channel is used for switching the module on and off. The address of the
first (dimming) channel of module 1 (left, see fig. 3, page 17) is selected by the three-
digit switch. The address for the second (on/off) channel of this module results of the
dimming address incremented by one. The next following address will be the dimming
address of module 2.
As long as the ballast receives valid DMX signals the modules are controlled by the
DMX remote control. In this case the on/off switch and the dimming potentiometer at
the front panel of the ballast have no function!
To switch the ballast 'on' a value between 128 and 255 must be send on the on/off
channel. A value of 0 .. 127 will cause the ballast switching off. Dimming is done by
sending a value between 127 and 255 on the dimming channel which will correspond to
lamp power regulated between 50% (127) to 100% (255) of the nominal value.
The green LED "DMX-SIGNAL" at every module shows that DMX signals are received
at the adjusted channel (dimming) and at the next channel (on/off). If this LED is
flashing, the selected DMX address is invalid ( < 1 or > 511).
The LEDs "MODULE", "LAMP" and "TEMP" have the same function as described in
"4.2 Operation of Module".
Attention:
The potential of the remote control signals at the connectors may not
exceed 70 Volts (peak) against protective earth.
Summary of Contents for EB 1200 Event Three
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