Legal Removal Request

Post: Hi Andrew No worries. I have got the Pi powered from the 5V switch mode supply now in the top of that photo previously, so all grounds in one place. Oh right maybe the newer type use an opto-isolator I must of not seen that. To be honest I havent opened a newer type, I know mine has a conventional relay though, as I have opened it in the past. I will use the 5V outputs on the IO Pi plus pins, as you suggest when I wired it up. Thank you for the new updated diagram, I will wire up the sensor, with the 10k resistors, when the IO Pi Plus and resistors arrive, and report back both good or bad. Both blue and yellow are needed in some way. Blue goes high when motion is detected, yellow goes high when no motion is detected. One question I have is will wiring all 16 pins up like in the diagram with 16 sensors (1 for each pin) work ok, if I was to do this? Also the IO PI's working as inputs will be not connected directly on the GPIO pins, like the other IO PI plus you can see in the photo with the RPi. Would it be ok to power the IO Pi's from the same 5V switch mode supply that also powers the Raspberry Pi now, as a external supply, or shall I keep them powered from the main Raspberry Pi header pins? Many thanks again Rhys