Can anyone make me understand why AOD16C is considered sinking and AOD16D is considered sourcing? As I understand, if my outputs are sourcing I send 24V to the PLC input, where 0V is common. If I am using sinking outputs, the PLC inputs float high until I provide 0V when I turn an output on.
I specified AOD16D output cards for my current project because I wanted to 'source' the PLC with 24V. After all, it says "Source current type" right on the spec sheet. So when I got everything wired, nothing worked right, so I started metering things. Low and behold, all of my outputs are floating, and when I turn them on, they go to 0V - the exact opposite of what I expected.
I ordered a pair of AOD16C cards assuming they will work for what I am wanting to accomplish, but I still don't understand why. And Fanuc's schematics, especially their I/O specs, confuse the crap out of me...