Allen-bradley Company, LLC

Joseph R Branc

Philip J Pisczak

William L Miller

Thomas J Merchant

Odo J Struger

A disc drive isolation system including a disc drive isolation module is disclosed. The isolation module is disposed in the enclosure and has an outer body and an inner body supported within the outer body with the disc drive mounted within the inner body. The mounting of the inner body within the outer body sequesters the disc drive against vibration and shock applied to the outer body. This arrangement enables almost any disc drive to be operated in an industrial environment independent of the shock and vibration characteristics of the environment.

Disc drive isolation system

A disc drive isolation system including an environment control enclosure and a disc drive isolation module is disclosed. A thermo-electric heat pump is mounted to the enclosure for cooling the interior of the enclosure and a fan circulates air within the enclosure. A humidity sensor controls the heat pump and the fan in response to the sensed humidity of the interior air. First and second temperature sensors control the heat pump andthe disc drive, respectively. The isolation module is disposed in the enclosure and has an outer body and an inner body supported within the outer body with the disc drive mounted within the inner body. The mounting of the inner body within the outer body sequesters the disc drive against vibration and shock applied to the outer body. This arrangement enables almost any disc drive to be operated in an industrial environment independent of the temperature, humidity, cleanliness, shock and vibration characteristics of the environment.

An input circuit for a digital control system includes a rectifier circuit, a current limiting circuit and a set of zener diodes which can be selectively employed to receive a wide variety of signals from industrial sensing devices. The signal is generated to an output drive circuit by an optocoupler which provides electrical isolation. The output drive circuit generates a logic level signal which is compatible with the digital electronic control system. The input circuit is particularly well suited for fabrication as an integrated circuit.

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Wickliffe, OH, United States of America

Joseph R Branc