[apalrd]

Originally Posted by Bob Steele

The rule has exemptions already for :

outputs of relay modules, speed
controllers, or sensor outputs

The rule also pertains to constant polarity wires only.

The spike relay still needs to be wired (for power) and then it uses a PWM cable for control Using the pneumatics bumper eliminates the need to power the spike through the power distribution panel.

If you're only using one or two solenoids, it is likely weight negative to do all of that instead of using the pneumatics bumper and NI high side switching module (which is not light at all), since you must already wire the pneumatics bumper for power. However, even if you had more solenoids, you could still do that and use incorrectly-colored wire for the high sides to the pneumatic solenoids, which you cannot do when using the pneumatics bumper.

I think all sensor wires should be exempt, including sensor power and sensor grounds.