Terminating And Extending A Bus; Terminating An Extended Bus - DEC 4000 600 series Owner's Manual

Connecting Additional Devices to Your System
Terminating To extend a bus, you attach a bus expansion cable (either DSSI
and Extending or SCSI, to match the bus) to the bus expansion port and attach
a Bus the other end of the cable into the external device.
To terminate a bus, you attach a terminator (either DSSI or
SCSI, to match the bus) to the bus expansion port.
Figure 6–5 shows a system with terminated and extended DSSI
and SCSI buses.
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Terminating an Always terminate a bus. If you extend a bus, move the
Extended Bus terminator (either DSSI or SCSI to match the bus) from the
bus expansion port on the system to the bus expansion port or
connector on the expansion enclosure or standalone device.
For information about attaching a terminator to an R400X
expander, refer to the R400X Expander Installation (EK–R400X–
CM).
6–20 System Configuration
Bus A, in the example, is a SCSI bus.
Terminate a SCSI bus by attaching a SCSI terminator
into the bus expansion port.
Extend a SCSI bus by attaching a SCSI expansion cable
into the bus expansion port.
Bus C, in the example, is a DSSI bus.
Terminate a DSSI bus by attaching a DSSI terminator
into the bus expansion port.
Extend a DSSI bus by attaching a DSSI expansion cable
into the bus expansion port.