Limit, Home, and Digital Inputs
Limit, Home, and Digital Inputs
Schematic of the opto-isolated limit, home, and general purpose digital inputs (All opto-isolated digital inputs are NPN type):
The opto-supply must be connected to +12 to +24VDC in order for the limit, home, and digital inputs to operate.
When the digital input is pulled to ground, current will flow from the opto-supply to ground, turning on the opto-isolator and activating the input.
To de-activate the input, the digital input should be left unconnected or pulled up to the opto-supply, preventing current from flowing through the opto-isolator.