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


PinWire
Color
Pin NameFunctionComments

1

Red

BUS

Power 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.

2

Violet

TRIGGER+ or GPI+

Positive terminal of optically isolated trigger input or General Purpose Input.

See trigger or GPI notes below chart.

3

Brown

TRIGGER- or GPI-

Negative terminal of optically isolated trigger input or General Purpose Input.

See trigger or GPI notes below chart.

4

Yellow

GPO1+

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.

5

Green

GPO1-

Negative terminal of optically isolated General Purpose Output 1.

Optical isolator emitter output. Typically connected externally to ground at pin 8.

6

Orange

GPO1
HCMOS

3.3V HCMOS General Purpose Output 1.

The maximum HCMOS output current is 5mA.

7

Blue

GPO2
HCMOS

3.3V HCMOS General Purpose Output 2.

The maximum HCMOS output current is 5mA.

8

Black

GROUND

Logic 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.