Below is the detailed schematic of the opto-isolated high speed digital output. 

Schematic:

Notes:

The opto-supply (pin 9 of 10 pin I/O connector) must be connected to at least +12VDC, but not exceed +48VDC, in order for the digital outputs to operate.  


Applies to:

10-PIN DIO connector (High speed Input/Output) Pins 1 to 4

Picture showing location of high speed input/output