Abstract: A scalable cable management system comprises an electronics module with a microcontroller; a plurality of drive modules and a releasably engaged cable cartridge for each drive module. Each cable cartridge houses a lead wire cable spool with an electrical slip ring connected to the wire. Stationary electrical contacts pickup signals from the slip ring for use by the electronics module. A device such as an electric or spring-driven motor, with a gear train and an optional clutch, controllably rotate the cable spool. A cleaning assembly cleans portions of the lead wire as it is extended or retracted. The microcontroller receives strain signals representative of tension on a lead wire from cable strain gauge. The electronics module may also include a defibrillator protection sub-system, a crossbar transfer switch, an instrumentation amplifier and a communications unit. Test terminals are also provided for assessing integrity of each lead wire.

Abstract: A method, system and computer program product for adaptively tracking the position of an entry portal, such as an automatic garage door. In accordance with the present invention a transmitter assembly senses and transmits the sensed position of the door position in a periodic manner at a predetermined transmit interval. A receiver assembly including a receiver module receives the transmitted door position signals and synchronizes the activation of the receiver module with the transmit interval such that the receiver receives the door position signals transmitted at the predetermined transmit interval. A receiver output indicator is then updated in accordance with the entry portal position determined by the received door position signal.