1. A unit for recording operating information of an electric motor, said unit comprising: a motor controller communicatively coupled to an electric motor, said motor controller comprising a processing device configured to control said unit; a protective circuit communicatively coupled to said processing device; and a memory device communicatively coupled to said protective circuit, said memory device configured to receive and store motor operating information provided by said processing device via said protective circuit, said protective circuit configured to limit a voltage applied to said memory device.