Sensoray 2263 - Manual (Page 9)

The optoisolated GPIO and the recommended circuits are shown on Fig.3.
Fig.3. Optoisolated GPIO.
The GPI-C1 is a galvanically connected GPI. It provides a simple way of communicating
to the 2263 in the cases when optical isolation is not required, by means of shorting this
signal to the ground. Please see the Software Reference for the details.
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