A coupling device having a first end for mating to a first connector of a first mating device and having a second end for mating to a second connector of a second mating device is disclosed. The coupling device includes a first conductor for extending and retracting at the first end, a second conductor at the second end and a conductive circuit for providing a conductive path from the first conductor to the second conductor. The conductive circuit is capable of being in an open circuit condition when the first conductor is in an extended position and in a closed circuit condition when the first conductor is in a retracted position. The first conductor is biased to remain in the extended position.