NOTE: The wires used for the CAN communication should be a shielded twisted pair
that is only grounded at the DCU.
RES Control Board (RCB)
The RES control board (RCB) is located within the motor controller assembly. The RCB is
responsible for the switching and supply of avionic battery power to the RFU. The RCB is
controlled by the battery selection switch located on the instrument panel within the cockpit of
the aircraft. The RCB can also power the motor controller cooling fans.