I have just purchased a 4 channel optoisolator but am unsure as to the pins - my research says NC doesn't do anything, is this correct? Also, I presume HVCC will be my voltage input line (I plan to use +5V) and HGND will be the ground. Does a separate ground need to be wired to GND on the right? Please see image below:
Much obliged for any help!
Much obliged for any help!