HP A3644A, A2969A Terminate the Scsi Bus, Only the two ends of a Scsi bus should be terminated

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Terminate the SCSI Bus

Unless the SCSIbus is properly terminated, the bus will not operate properly. Terminators provide matching impedance on SCSIbus signal lines.

This product includes an external SCSIbus terminator to terminate the peripheral end of a differential SCSIbus. The terminator consists of a 68-pin, high density male connector with thumb screws.

Install the external terminator on the end of the SCSI bus (opposite the SCSI host adapter). If an intermediate device has internal terminations installed, remove them before attaching the external terminator.

CATJTION

Only the two ends of a SCSI bus should be terminated.

 

Excessive or improper termination may overload the adapter’s

 

termination power circuitry. Refer to device manuals for their

 

proper operation on the SCSI bus.

Seefigure 1 on page 12for an example of SCSIbus termination.

32 Instcrllation Rocedures

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Contents III’ A2969NA36M HP-HSC FastlWide Diffkrentid Scsi Adapt,ers Edition March Regulatory Statements About This Book Table of Contents Service Information Reference Product Contents DescriptionHP-HSC Fast/Wide Differential Scsi A2969AX Scsi Termhator Al65862024Supported HP A2969A SpecificationsPower 75 W @ 5.OV Consumptior 5C to 40C 4oc to 70C 41*F to 104F 15%to 84E-G 15%to 95%At 40C 104F Km 15,000 ftInstallation Procedures Installation Overview Prepare to Install the Adapter Verify Product ContentsRecord Adapter Information Shut Down the Operating System and Switch Off the Computer Set Scsi Adapter DIP Switches ? L Numbers on Printed-Circuit Card II klldMLlRRAR rll-OPENl If Necessary, Remove the Termination ResistorsInstall the Adapter Install the HP A2969A Scsi Adapter in an HP 9000 Series Kxxx Slot covers Installation Procedures Install the HP A3644A Scsi Adapter in an HP 9000 Series T6xx HP-H!3C I/O bus converter Removing a cover blank Installing the HP A3644A card Instalition Procedures Page Connect Cable and Peripheral Devices Scsi Cable ConnectionConnecting cables to the computer InstaUationAocedmes Peripheral Device Connections Proper operation on the Scsi bus Terminate the Scsi BusOnly the two ends of a Scsi bus should be terminated Switch Power on to Peripherals, then to the Computer Configure the Operating System and the Adapter Verm OperationService Information Field Replaceable Units Troubleshooting Tools Replacing the Term Power Fuse Term power fuse location Service informationInstalling a replacement fuse Selvice Information Mapper Iotest Removal/Replacement Instructions Reshipment Guidelines 44serviceInformation Glossary SmaUlight emitting device used to provide status information Scsi ID Page Install the adapter Bus arbitrationInstallation Verify proper operation Index Title Company Address City & State Tape Learning Products MS5668Company Copyright Hewlett-Packard Company A2969-96002