An apparatus comprising: a controller configured to receive information from an electric motor unit over a wireless communications link between the controller and the electric motor unit (104; 302), identify commands for the electric motor unit (104; 302) from the information received, and send the commands identified to the electric motor unit (104; 302) over the wireless communications link; characterized by a plurality of controllers (304, 306, 308) including the controller, the plurality of controllers preferably being in a location remote to the electric motor unit, configured to receive the information from the electric motor unit (104; 302) over the wireless communications link between the controller and the electric motor unit (104; 302), and identify the commands for the electric motor unit (104; 302) from the information received; and a selector configured to receive the commands for the electric motor unit (104; 302) from the plurality of controllers (304, 306, 308), select the commands from one of the plurality of controllers (304, 306, 308), and send the commands selected to the electric motor unit (104; 302) over the wireless communications link. a controller configured to receive information from an electric motor unit over a wireless communications link between the controller and the electric motor unit (104; 302), identify commands for the electric motor unit (104; 302) from the information received, and send the commands identified to the electric motor unit (104; 302) over the wireless communications link; characterized by a plurality of controllers (304, 306, 308) including the controller, receive information from an electric motor unit over a wireless communications link between the controller and the electric motor unit (104; 302), identify commands for the electric motor unit (104; 302) from the information received, and send the commands identified to the electric motor unit (104; 302) over the wireless communications link; characterized by a plurality of controllers (304, 306, 308) including the controller, the plurality of controllers preferably being in a location remote to the electric motor unit, configured to receive the information from the electric motor unit (104; 302) over the wireless communications link between the controller and the electric motor unit (104; 302), and identify the commands for the electric motor unit (104; 302) from the information received; and a selector configured to receive the commands for the electric motor unit (104; 302) from the plurality of controllers (304, 306, 308), select the commands from one of the plurality of controllers (304, 306, 308), and send the commands selected to the electric motor unit (104; 302) over the wireless communications link. receive the information from the electric motor unit (104; 302) over the wireless communications link between the controller and the electric motor unit (104; 302), and identify the commands for the electric motor unit (104; 302) from the information received; and a selector configured to receive the commands for the electric motor unit (104; 302) from the plurality of controllers (304, 306, 308), select the commands from one of the plurality of controllers (304, 306, 308), and send the commands selected to the electric motor unit (104; 302) over the wireless communications link.