5
CAUTION!
Never connect the 12 VDC supply to S1 or S2 and the 0 V supply
to GND, otherwise S1 and S2 output will be crashed.
A protection is implemented to protect the product in case of wrong
connection, when the following mistakes occur:
∙Inversion of the supply wires (GND and V+).
∙12 V supply connected to S3 and S4 and 0 V supply on GND.