Below is the detailed schematic of the open collector digital output, which is configured as current sourcing.

Schematic:

Schematic of Sink open collector

Notes:

The open collector output is current limited by the internal current limiting resistor. Use the following formula to understand the maximum current that can be sunk:


Vopto / 4700 = Iout


Vopto :  the opto voltage input

 Iout : the maximum current that will flow in Amps when the output is shorted to opto+V. 


Actual current may be lower based on the external circuit connected.

Example wiring:

Example of open collector sink


Applies to:

JBD-4EX-I26 general I/O pins configured as sinking and output.

I/O Config for Sinking current