1. A unit for recording operating information of an electronically commutated motor (ECM), said unit comprising: an ECM controller communicatively coupled to an ECM, said ECM 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 ECM operating information provided by said processing device via said protective circuit, said protective circuit configured to limit a voltage applied to said memory device.