o5i_:
The coils need 5VDC (JD-VCC), wich i can separate from the optocoupler (VCC).
you have no care about the relay side of the optocoupler, your only concern is getting the 10-20mA to the opto-coupler.
you can easily do that with any 3v device
for all you care, the relay coil can be 120 vac and controlled by the optocoupler.
that is the whole reason for the opto-isolator. it isolates the signal from the power side.