PL-B enclosed cameras with an MV (Machine Vision) interface on a 9-pin Micro-D connector provide optically-isolated connections for one external trigger and two general purpose outputs. The mating connector is a Molex 83421-9014 cable receptacle with Molex 83000-0083 crimp terminals (for 26 or 28 AWG wires).
MV pinout and description
PL-B MV pinout as viewed at the back of the camera, or at the pin-insertion-end of the mating connector
|1||POWER ( FireWire and GigE cameras only)||Firewire cable power, 8-30 VDC (typically 12 V)||Maximum current available from this pin is 250 mA|
|1||POWER (USB2 camera only)||+5.5 VDC (internally generated by camera)||Maximum current available from this pin is 50 mA.|
|2||GP2+||Positive terminal of optically isolated General Purpose Output 2||Optical isolator open collector output. Provides current sink to pin 3 when GP2 is active. Also see GPO notes below chart.|
|3||GP2-||Negative terminal of optically isolated General Purpose Output 2||Optical isolator emitter output. Typically connected externally to pin 9 (Ground)|
|4||GP1+||Positive terminal of optically isolated General Purpose Output 1||Optical isolator open collector output. Provides current sink to pin 5 when GP1 is active. Also see GPO notes below chart.|
|5||GP1-||Negative terminal of optically isolated General Purpose Output 1||Optical isolator emitter output. Typically connected externally to pin 9 (Ground).|
|6||TRIGGER+||Positive terminal of optically isolated trigger input.||See Trigger Notes below chart.|
|7||TRIGGER-||Negative terminal of optically isolated trigger input||See Trigger Notes below chart|
|8||(no connection)||(not used)|
|9||GROUND||Logic and chassis ground|
- To initiate a "positive" trigger, apply a voltage between 5 V and 12 V (4–11 mA) to the trigger terminals.
- The optically isolated trigger input circuit includes an internal 1 k ohm 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 6 (TRIGGER+) and use the open collector output of an external position sensor device to complete the circuit from Pin 7 (TRIGGER–) to Pin 9 (GROUND).
- PixeLINK API - Refer to the functions PxLSetFeature, PxLGetFeature and Trigger Types.
- Maximum GPO current is 15mA.
- Maximum GPO voltage between positive and negative terminals is 40V.
- Pixelink API - Refer to the functions PxLSetFeature, PxLGetFeature and GPIO Types.
MV interface schematic
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.