Apparatus for hot removal from/insertion to a connection bus of a non removable media magnetic recording unit.

摘要

Apparatus for hot removal from/insertion to a connection bus of a non removable media magnetic recording unit, comprising a plurality of electromagnetic switches for isolation of the signal terminals of the unit from the bus, thereby preventing noise injection into the bus, control and timing circuits for deenergization of the unit only after opening of the switches and for enabling removal of the unit only after deenergization and circuits for imparting to the signal terminals of the unit a bias voltage intermediate or close to the electrical signal levels present on the bus, the insertion occurring by closing the switches when the unit is already powered and the terminals are biased so as to minimize the amplitude of the noise injected onto the bus.