I'm just about finished with my AR2 and ran into one issue with wiring up the pneumatic valve. In the picture of on Pg33 of the Electrical Enclosure manual, you have a small picture of the solenoid valve with the flyover diode. In that picture you have a 3-wire connection however in the picture right next to it, You just have a +24v and -24V connections... Is the 3rd green wire just a ground wire?
Also, are the arrows for which screw terminals on the relay board correct? It seems its pointing to the NO and NC pins, however that means there will never be a connection no matter if the relay is activated or not right?