Cognex In-Sight 8200, Справочное руководство

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Acquisition Trigger Input
The vision system features one acquisition trigger input, which is optically isolated. The acquisition trigger input can be
configured to trigger from either an NPN (current sinking) or PNP (current sourcing) device.
Specification Description
Voltage
ON: 20 to 28VDC (24VDC nominal)
OFF: 0 to 3VDC (8VDC nominal threshold)
Current
ON: 1.9 to 3.0mA from 20 to 28V input.
OFF: < 300µA for <3VDC input.
Resistance: ~10 kOhms
Delay
1
72µs maximum latency between leading edge of trigger and start of acquisition. Input pulse should be
minimum of 1 ms wide.
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The Breakout cable can be used to trigger from an NPN photoelectric sensor or PLC output. Connect
to +24VDC and connect TRIGGER- to the output of the photoelectric sensor. When the output turns ON, it pulls
TRIGGER- down to 0VDC, turning the opto-coupler ON. For more information, refer to Breakout Cable
Specifications on page 30 .
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The Breakout cable can also be used to trigger from a PNP photoelectric sensor or PLC output. Connect
to the output of the photoelectric sensor and connect TRIGGER- to 0VDC. When the output turns ON,
it pulls up to +24VDC, turning the opto-coupler ON. For more information, refer to Breakout Cable
Specifications on page 30 .
1
Maximum latency is based on a 1µs trigger debounce.
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Specifications