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Document Title: AHA-3980/3980W/3985/3985W Quick
Reference: Hardware Installation
Part Number: 510673-00, Rev. D
Print Spec Number: 492990-00
Current Date: 10/3/95
ECN Date:10/10/95
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– six meters (19.7 feet) if you are using 5 MByte/
sec asynchronous or synchronous data transfer
rates
Connecting Internal SCSI Devices
The AHA-398x kit includes SCSI ribbon cables, each of
which has several connectors for attaching internal
devices to the AHA-398x. The connector at one end of
each cable attaches to a passthrough terminator. This
connector can still attach to a SCSI device, even with
the terminator in place.
Note:
If the cables do not have enough con-
nectors for all SCSI devices, you can purchase
additional cables from Adaptec at the number
on page 12.
To attach the internal devices, follow these steps:
1
Attach the SCSI connector at one end of the rib-
bon cable (the end without the terminator) to the
internal connector for Channel A, B, or C, match-
ing pin 1 on the ribbon cable with pin 1 on the
channel connector. Pin 1 on the ribbon cable is
usually marked with a contrasting color on one
edge of the cable. Pin 1 on the channel connector
is marked with a 1.
2
Attach the SCSI connector on the passthrough ter-
minator to the SCSI connector on the first SCSI
device, matching pin 1 on the terminator connec-
tor with pin 1 on the device. Pin 1 on device con-
nectors is usually marked by a triangle or a 1.
Note:
If you use cables without a passthrough
terminator, you must terminate the end SCSI
device; see Terminating the SCSI Bus on page 6.
3
To connect other internal SCSI devices, attach
them to the other connectors on the ribbon cable,
matching pin 1 on the ribbon cable with pin 1 on
the device connector.
