Hi all: I am trying to experiment with an older (10 plus year old) electronic inspection system to learn how electronic inspection works. The camera I bought is an old Cognex DVT model 630 that requires a 24 volt source. I have been able to get one of our people to rig me up a system with a plus and minus leads. The issue is the camera has the following pins per their manual: Pins 1-12: Inputs & Outputs Pins 13: Ground Pin 14 &15: + 24V My questions: 1) How can pin 14 and 15 both be for the positive lead? Is it common that either of the two (14 or 15) pins could be connected to the positive lead? 2) Is pin 13 ground the same as the negative lead? Many thanks!!