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Laser Projectors FAQ

How is the ILDA connector pinout?

A common interface is used in showlaser industry to operate laser projectors by computer control. As interface the DB-25 connector is used, as the signal transmission is done in a parallel transmission. The signal transmission itself does not use a modern protocol type, like used e.g. in ethernet networks or other serial transmission types, but it is a very low-level transmission that only modulates the voltage on every pin - usually in a range of 5V difference (-2.5V - +2.5V or 0V - 5V).

This so called "ILDA connection" is a rather old transmission method, however it is used for nearly all computer controllable laser systems at the moment.

>>> read more and see pinout setting >>>


As the ILDA signal is a parallel transmission, the computer control signal (which is serial) needs to be converted to ILDA. This is done by the so called DAC (Digital Analogue Converter), which is also called "USB Interface" or "USB box" in combination with laser software. The parallel signal can only transmit one type of signal. It is not possible to address different lasers and give them individual control signals with one DAC. Do do so, you need additional DACs (one for each laser that should be controlled individually). However, the same ILDA signal can be used by many laser projectors - but they would do all the same.

To reduce the need of DACs, we suggest to link the ILDA signal of some projectors. Please see our setup suggestions for details: Installation & Setup FAQ



The ILDA connector has the following pinout:

ILDA DB25 connector


Pin 1x-axis scanner, positive signal. Difference of 10V
Pin 2y-axis scanner, positive signal. Difference of 10V
Pin 3intensity/brightness, positive signal. Difference of 5V
Pins 4 and 17Interlock. Linking of both enables output
Pin 5red intensity, positive signal. Difference of 5V
Pin 6green intensity, positive signal. Difference of 5V
Pin 7blue intensity, positive signal. Difference of 5V
Pin 8deep blue intensity, positive signal. Difference of 5V
Pin 9yellow intensity, positive signal. Difference of 5V
Pin 10cyan intensity, positive signal. Difference of 5V
OR: DMX512 IN; positive signal (Showeditor and Phoenix interfaces).

Pin 11DMX512 OUT; positive signal (Showeditor and Phoenix interfaces).
Pin 12Projector return signal
Pin 13Shutter. Difference of 5V
Pin 14x-axis scanner, negative signal. Difference of 10V
Pin 15y-axis scanner, negative signal. Difference of 10V
Pin 16intensity/brightness, negative signal. Difference of 5V
Pins 17 and 4Interlock. Linking of both enables output
Pin 18red intensity, negative signal. Difference of 5V
Pin 19green intensity, negative signal. Difference of 5V
Pin 20blue intensity, negative signal. Difference of 5V
Pin 21deep blue intensity, negative signal. Difference of 5V
Pin 22yellow intensity, negative signal. Difference of 5V
Pin 23cyan intensity, negative signal. Difference of 5V
OR: DMX512 IN; negative signal (Showeditor and Phoenix interfaces)
Pin 24DMX512 OUT; negative signal (Showeditor and Phoenix interfaces).
Pin 25Ground
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