PL-D enclosed cameras with a Machine Vision interface provide hardware Trigger and GPIO capability. The mating connector is an 8-pin Hirose HR25A-7P-8P cable plug with solder pins for 28 AWG wires. The connector pinout is shown below (not-to-scale for clarity of pin numbers).



Pin Assignment


PinPin NameFunctionComments
1BUSPower output from USB3 cable, shared with camera, typically +5 VDC.Actual voltage level depends on the computer, cable length, and total current load. The maximum current available from this output pin is 100mA.
2TRIGGER+ or GPI+Positive terminal of optically isolated trigger input or General Purpose Input.See trigger or GPI notes below chart.
3TRIGGER- or GPI-Negative terminal of optically isolated trigger input or General Purpose Input.See trigger or GPI notes below chart.
4GPO1+Positive terminal of optically isolated General Purpose Output 1.Optical isolator open collector output. Provides current sink to pin 5 when GPO1 is active. Maximum 15 mA. Maximum 40 V.
5GPO1-Negative terminal of optically isolated General Purpose Output 1.Optical isolator emitter output. Typically connected externally to ground at pin 8.
6GPO1
HCMOS
3.3V HCMOS General Purpose Output 1.The maximum HCMOS output current is 5mA.
7GPO2 
HCMOS
3.3V HCMOS General Purpose Output 2.The maximum HCMOS output current is 5mA.
8GROUNDLogic ground.Logic ground is internally connected to the camera metal enclosure.


Trigger Notes

  • To initiate a trigger, apply a voltage between 5V and 12V (4-11mA) to the optically isolated trigger input terminals.

  • The optically isolated trigger input includes an internal 1K ohm series resistor.

  • When using a trigger voltage larger than 12V, add an external series resistor with an adequate power rating.

  • Debounce delay is set in the camera to 1 microsecond.

  • A typical application of the trigger input is to connect Pin 1 (POWER) to Pin 2 (TRIGGER+), and then use the open collector output of an external position sensor device to complete the circuit from Pin 3 (TRIGGER–) to Pin 8 (GROUND).


Trigger Polarity


GPI Notes

  • Review the trigger notes above for electrical characteristics of the GPI.

  • Only GPIO with the index 1 can be configured for reading and returning a GPI status value.


For Trigger and GPI implementation, review the Trigger and the General Purpose Input Output articles respectively.