ILDA ISP Connector
In the laser show industry the ILDA ISP connector is the standard interface to connect a laser projector to its controlling equipment.
It is a 25 pin D-SUB connector. The projector uses a male connector, the controlling equipment a female one.
The signals are transmitted differentially, that means for each signal a conductor with positive and negative polarity exists. An exception is the shutter signal, whose reference potential is the ground wire (Pin 25).
The interlock loop can be used by the projector to detect whether a laser controller is connected. Therefore Pins 4 and 17 are connected to each other inside the laser controller.
Differing from the standard the ILDA connector often is also used to carry DMX signals. The user-defined signal pair 3 is used as DMX input, user-defined signal pair 4 is used as DMX output.
| Pin | Voltage Level | Description | |
|---|---|---|---|
| 1 | ±10V differential | X Axis + | |
| 2 | ±10V differential | Y Axis + | |
| 3 | 0 to +5V differential | Intensity + (for single color projector) | |
| 4 | - | Interlock A (connected to Interlock B inside the DAC) | |
| 5 | 0 to +5V differential | Intensity Red Laser + | |
| 6 | 0 to +5V differential | Intensity Green Laser + | |
| 7 | 0 to +5V differential | Intensity Blue Laser + | |
| 8 | 0 to +5V differential | User-Defined Signal 1 + (e.g. deep blue laser) | |
| 9 | 0 to +5V differential | User-Defined Signal 2 + (e.g. yellow laser) | |
| 10 | 0 to +5V differential | User-Defined Signal 3 + (e.g. Cyan, also often DMX-Input +) | |
| 11 | - | User-Defined Signal 4 + (e.g. 3D depth, also often DMX-Output +) | |
| 12 | - | User-Defined Signal from Projector to DAC | |
| 13 | 0 to +5V | Shutter Signal (5V=Laser enabled, Refrence Potential is ground) | |
| 14 | ±10V differential | X Axis - | |
| 15 | ±10V differential | Y Axis - | |
| 16 | 0 to +5V differential | Intensity - (for single color projector) | |
| 17 | - | Interlock B (connected to Interlock A inside DAC) | |
| 18 | 0 to +5V differential | Intensity Red Laser - | |
| 19 | 0 to +5V differential | Intensity Green Laser - | |
| 20 | 0 to +5V differential | Intensity Blue Laser - | |
| 21 | 0 to +5V differential | User-Defined Signal 1 - (e.g. deep blue Laser) | |
| 22 | 0 to +5V differential | User-Defined Signal 2 - (e.g. yellow Laser) | |
| 23 | 0 to +5V differential | User-Defined Signal 3 - (e.g. cyan, also often DMX-Input -) | |
| 24 | - | User-Defined Signal 4 - (e.g. 3D depth, also often DMX-Output -) | |
| 25 | - | Ground |