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Browse Prior Art Database

Electrostatic Dissipative Enclosed Connector

IP.com Disclosure Number: IPCOM000122679D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 2 page(s) / 78K

Publishing Venue

IBM

Related People

Rachui, RA: AUTHOR

Abstract

Described is a device that eliminates the risk of transmitting unwanted electrostatic discharge through the cable connector system used to attach external SCSI devices.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 58% of the total text.

Electrostatic Dissipative Enclosed Connector

      Described is a device that eliminates the risk of
transmitting unwanted electrostatic discharge through the cable
connector system used to attach external SCSI devices.

      Up to seven external SCSI I/O devices 1 that attach to the RISC
System/6000* (HOST) can be "daisy chained" together using the unique
IBM SCSI cable/connector system shown in Fig. 1.  However this method
of interconnection exposes the various metal ground shields 2 at the
dual connectors 3 to the possibility of receiving a failure-inducing
electrostatic discharge (ESD) from external sources such as personnel
or furniture.  This connector as illustrated in Fig. 1.  The
connector housing is made of a preferably elastromeric material that
has static dissipative properties to assure that the high voltages
associated with an electrostatic discharge will be reduced to a
harmless level and dissipated into one of the metal ground shields 2,
and not into the SCSI signal lines of the connector system. This
prevents ESD failures of the external SCSI devices and of the host
electronics and internal SCSI devices within the host system.

      The system is designed so that the SCSI bus/cable "daisy chain"
is not broken when some of the dual connectors are disconnected from
their external devices, leaving the other SCSI devices and the host
operable.  This scenario leaves the dual connector 3 otherwise
exposed to static discharge, and therefore benef...