Adding an Ademco 5881ENM wireless receiver to my Vista 15P. All of the documentation shows 4 wires connecting between the receiver and the panel. However, the receptacle on the receiver has 5 pins and the plug has 5 wires, not 4. Green wire appears to be pin 1, black pin 2, red pin 3, blue pin 4, yellow pin 5, do I simply ignore the blue wire pin 4 on the receiver?
Bob