Adaptec AMM-1572 - Manual (Page 30)

2-6
AMM-1570/1572 User’s Guide
AMM-1570/1572 User’s Guide
Stock Number: 510526-00, Rev. B
Page: 2-6
Print Spec Number: 492379-00
Current Date: 3/7/94
ECN Date: 3/8/94
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Terminating SCSI Devices
Most SCSI devices use a jumper or a switch located close to their
SCSI connector(s) to control termination. On some SCSI devices, you
must physically remove or install terminator resistor module(s).
Refer to the manufacturer’s documentation to determine how to
enable or disable termination on your particular SCSI device(s).
Note: Since the AMM-1570/1572 always supplies termi-
nation power on the SCSI bus, termination power sup-
plied by other SCSI devices should be disabled.
Terminating the AMM-1570/1572
Host adapter termination is determined by the types (internal
and/or external) of SCSI devices connected to the AMM-1570/1572.
The table below describes the possible configurations for host
adapter termination.
The factory installed bus terminators on the AMM-1570/1572 are
located below the SCSI internal connector and are enabled
(Installed) by default. To disable termination on the host adapter,
remove all three terminators.
Devices Connected To Host Adapter
Host Adapter
Termination
Internal and external devices Disabled
Internal devices only Enabled
External devices only Enabled
Terminators
Figure 2-4. Terminators