HP Model 705 - Workstation User Manual page 24

Introduction
SCSI Bus Termination Guidelines
There are certain guidelines to follow when terminating a SCSI bus.
CAUTION: Unless the SCSI bus is properly terminated, the bus will not
operate. Terminators provide impedance matching on SCSI bus
signal lines.
The last device connected to the SCSI bus must be terminated with a SCSI
terminator. Use a Hewlett-Packard K2291 50-pin low-density bail-lock active
terminator or a Hewlett-Packard C2904A high-density thumbscrew active
terminator to terminate the last SCSI option device.
Any termination on other devices on the bus must be removed. This includes
external termination plugged into a SCSI receptacle on the device, or internal
resistor packs. (Refer to peripheral device or system configuration manuals for
termination information.)
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