A translatory actuator unit including a translatory actuator module that moves an object straightly, a force sensor that detects a load applied to the translatory actuator module, and a servo control module that controls a speed, a position andor output power of the translatory actuator module. The female coupler has locking members or balls adapted to be forced into engagement with a male coupler inserted into the female coupler by a sleeve or outer movable member. The component includes source and drain regions of first conductivity type and first doping concentration in the first semiconductor layer. Control logic is operable to enable the write signal when a microprocessor in the computer is in a system management mode or a lock signal is not asserted, and to disable the write signal when the lock signal is asserted and the microprocessor is not in the system management mode.