Quote:
Originally Posted by chris janney
thats fine and all but which wire is signal and which is power, and which port on the pressure switch do they need to go on.
|
The pressure switch is just a switch, nothing special. Black wire on one side, white wire on the other, then plug it into one of the Digital I/O ports on the side car, where the black goes to (-), and the white goes to SIG. In reality, it doesn't matter which way the wire goes since you're just completing a circuit, but that's the way you're supposed to plug it in.
The PWM cable (3 wire White, Red, Black) wire is the signal wire for both the Spike and for the pressure switch. The Spike and pressure switch do not connect directly. By the rules, the compressor must be controlled by the cRIO.
To make it easy for later, plug the Spike into the Relay 1 port, and the Pressure Switch into the Digital I/O 1 port.
That's the side car below. You can see the Digital I/O and Relay on the right side.
One last note, please slow down your typing. I know you're in a hurry to get it all working, but it actually takes less time to write your question down clearly, then for me to decipher what you are asking. I'm not even sure what power and signal you're trying to figure out, so I'm assuming the Spike. Be more descriptive.