Hopefully you got it. I can tell you of something else I have seen. The A-channel of the position encoder sends speed feedback to the Net Box. I had a noise problem in which the pulse width modulation of the door operator being used was being picked up by the ETS speed sensors. This was causing the 150 ft/min sensor to trip as the car got into the floor. I ended up rerouting the shielded pairs TC wires from the encoder and added ferrite beads around each pair.