Cognex DS900 Series, Reference Information

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RS422
The RS422 connection (Pin 11 and 12 of the multifunction port) can be used in either of the following configurations:
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Load user modes and sensor control (half-duplex RS422).
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Supplying line trigger signals.
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Synchronization of line trigger signals.
Signal Levels
The switching inputs of the multifunction port can either be used for encoder or trigger input or for loading previously
stored user modes. The signal levels are switchable for all switching inputs together via software between LLL (low-
voltage-, TTL logic) and HLL (high-voltage-, HTL logic).
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LLL level: Low 0 V… 0.8 V, High 2.4 V… 5 V, internal pull-up 10 kOhm to 5 V
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HLL level: Low 0 V… 3 V, High 11 V… 24 V (permitted up to 30 V), internal pull-up 10 kOhm to 24
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Pulse duration: ≥ 5 μs
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Installation Instructions