An electronic assembly includes a terminal unit, a signal connector and a memory device. The terminal unit includes a plurality of terminals consisting of a set of coupler terminals and a set of control terminals. The signal connector is utilized for electrically connecting to the coupler terminals, wherein electrical connection of the signal connector to the coupler terminals results in a first relation signal. The memory device is utilized for storing a first relation data corresponding to the first relation signal. Once the signal connector is electrically disconnected from the coupler terminals and upon required the signal connector is again electrically connected to the terminal unit results in a second relation signal such that the electronic assembly is prevented from being operated in case the second relation signal fails to conform to the first relation signal.