Patent ID: 7414335

Claim:
A controller for a device, the controller comprising: a connector for plugging the device into a source of energization and unplugging the device from the source of energization, wherein the connector comprises: a first contact for connecting to a first power supply contact of the source; a second contact for connecting to a logic output from the source; and a third contact for connecting to a second power supply contact of the source; an impedance having a current input that couples to the first contact of the connector, an impedance control input, and a current output coupling to the device; and an impedance control circuit comprising: a first timer; a logic input coupling to the second contact of the connector; and an impedance control output connected to the impedance control input, the impedance control output forcing the impedance OFF during a first time interval controlled by the first timer which is triggered by the device being plugged into the source of energization, and the logic output from the source enabling a limited inrush at the current input during a second time interval controlled by a second timer.