I am trying to control a small 12vdc relay via a digital output to control a SPDT logic switch. The relay's nominal power is 360 mW. I have tried wiring per manual with no success. To solve my problem, I need to understand what is going on between the + and - digital output terminals. When the pin is high or low, I don't measure any voltage across the leads, nor any continuity? Any helpful explanation or suggestions would be much appreciated!