Trigger and GPOs

Enclosed cameras with an MV (Machine Vision) interface on a 6-pin round Hirose connector provide optically-isolated connections for one external trigger and two general purpose outputs. The mating connector is a Hirose HR10A-7P-6P, a 6-pin round plug connector with solder-cup pins for the cable wires.

(Pinout as viewed on the back of the camera, or at the solder-end of the mating connector)	Pin	Pin Name	Function	Comments
	1	POWER	FireWire cable power, 8–30 V DC (typically 12 V)	Maximum current available from this pin is 250 mA.
	2	TRIGGER+	Positive terminal of optically isolated trigger input	To initiate a"positive" trigger, apply a voltage of between 5 V and 12 V (4–11 mA) to the trigger terminals. The optically isolated trigger input circuit includes an internal 1 kΩ series resistor. When using a voltage higher than 12 V, add an external resistor with adequate power rating. A typical application of the trigger input is to connect Pin 1 (POWER) to Pin 2 (TRIGGER+) and use the open collector output of an external position sensor device to complete the circuit from Pin 3 (TRIGGER–) to Pin 4 (GROUND). PixeLINK API-Refer to the functions PxLSetFeature, PxLGetFeature and Trigger Types
	3	TRIGGER–	Negative terminal of optically isolated trigger input
	4	GROUND	Logic and chassis ground
	5	GP1	General Purpose Output (GPO) 1, for strobe	Open-collector current sink output from optical isolator. Provides current sink to Pin 4 (GROUND) when GP1/GP2 (as appropriate) is active. Maximum current is 15mA. Maximum voltage with respect to ground is 40V. PixeLINK API-Refer to the functions PxLSetFeature, PxLGetFeature and GPIO Types
	6	GP2	General Purpose Output (GPO) 2, for strobe

The trigger inputs are designed to work with a floating differential signal which will operate with a supply voltage between 5V and 12V across the trigger terminals. With the Trigger polarity set to Positive, a rising voltage will cause a trigger. A falling voltage will cause a trigger if the trigger polarity is negative. The trigger input can be either positive or negative pulse. The minimum pulse width depends on the debounce delay set in the camera – typically at least 50 microseconds for analog signals and at least 1 microsecond for TTL signals.

The GPO pins are open-collector current sink outputs. The GPOs can handle a maximum of 15mA and 40V with respect to ground. To use them with TTL inputs, the GPO output lines must be pulled high with a 1K ohm resistor.

Board Level Cameras

Board level cameras with an EMV (Extended Machine Vision) interface on an 8-pin 1.25mm header connector provide 3.3V TTL-level connections for one external trigger and four general purpose outputs. The mating connector is a Molex 51021-0800 receptacle with Molex 50079-8100 wire crimp terminals.

EMV Connector reference J6

Use a 8-pin 1.25mm cable housing Molex 51021-0800 and crimp terminals Molex 50079-8100

Pin	Pin Name	Function	Comments
1	3.3V	+3.3 VDC power output	Maximum current available from this pin is 50mA. Maximum external capacitive load on this pin is 50uF.
2	/TRIGGER	/TRIGGER input	3.3V TTL input has internal 1K ohm pullup resistor and HCMOS inverter. A voltage transition from 3.3V to 0V will initiate a positive trigger. PixeLINK API-Refer to the functions PxLSetFeature, PxLGetFeature and Trigger Types
3	GROUND	Logic and chassis ground	0V reference
4	GP1	General Purpose Output 1	3.3V TTL outputs from HCMOS driver maximum current 5mA PixeLINK API-Refer to the functions PxLSetFeature, PxLGetFeature and GPIO Mode
5	GP2	General Purpose Output 2
6	GP3	General Purpose Output 3
7	GP4	General Purpose Output 4
8	n/c	No connection

Schematic

Comments

3.3 Power output, 50 mA max
Falling edge on /trigger input represents "positive" trigger in camera

Rising edge on GPO output represents "positive" outputs. Each 5mA max.

Use 8-pin 1.25mm cable housing Molex 51021-0800 and crimp terminals Molex 50079-8100

For all cameras, the value of the trigger input at any given time can be read from the IIDC Trigger Inquiry register. This can be used as a general purpose input if one is required.

Debounce Delay

The debounce delay allows for non-TTL signals (slow and/or noisy edges) to be used in the trigger input. The delay can be adjusted using the Trigger Debounce Tool.

Trigger Parameters

Mode	Type	Polarity	Delay	Parameter
0	Free-running/ Hardware/Software	Pos / Neg	0 - 2.5 sec	N/A
1	Free-running/ Hardware/Software	Pos / Neg	0 - 2.5 sec	N/A
2	Free-running/ Hardware/Software	Pos / Neg	0 - 2.5 sec	2 - 100 triggers
3	Free-running/ Hardware/Software	Pos / Neg	0 - 2.5 sec	1 -100 frame periods
14	Free-running/ Hardware/Software	Pos / Neg	0 - 2.5 sec	1 - 100 frames

(all Trigger delay times are in steps of 10 usec)

Mode	Type	Polarity	Delay	Parameter
0	Free-running/ Hardware/Software	Pos / Neg	0 - 2.5 sec	N/A
14	Free-running/ Hardware/Software	Pos / Neg	0 - 2.5 sec	1 - 1000 frames

(all Trigger delay times are in steps of 10 usec)

Mode	Type	Polarity	Delay	Parameter
0	Free-running/ Hardware/Software	Pos / Neg	0 - 2.5 sec	N/A

(all Trigger delay times are in steps of 10 usec)

GPO Parameters

Mode	Polarity	Parameter 1	Parameter 2	Parameter 3
Strobe	Pos / Neg	0 - 2.5 sec delay	10 usec - 2.5 sec duration	N/A
Normal	Pos / Neg	N/A	N/A	N/A
Pulse	Pos / Neg	1 - 1000 pulses	10 usec - 100 msec duration	10 usec - 100 msec gap
Busy	Pos / Neg	N/A	N/A	N/A

(all GPO time parameters are in steps of 10 usec)

Mode	Polarity	Parameter 1	Parameter 2	Parameter 3
Strobe	Pos / Neg	0 - 2.5 sec delay	10 usec - 2.5 sec duration	N/A
Normal	Pos / Neg	N/A	N/A	N/A
Busy	Pos / Neg	N/A	N/A	N/A
Flash Window	Pos / Neg	N/A	N/A	N/A

(all GPO time parameters are in steps of 10 usec)

Mode	Polarity	Parameter 1	Parameter 2	Parameter 3
Strobe	Pos / Neg	0 - 2.5 sec delay	10 usec - 2.5 sec duration	N/A
Normal	Pos / Neg	N/A	N/A	N/A
Busy	Pos / Neg	N/A	N/A	N/A
Flash Window	Pos / Neg	N/A	N/A	N/A

(all GPO time parameters are in steps of 10 usec)

Trigger and GPOs - PL-A700 Series

Enclosed Cameras

Board Level Cameras

Debounce Delay

Trigger Parameters

GPO Parameters