Seagate ST3285N, Product Manual

Page: 25 / 151

2.4 SCSI connector
You can daisy-chain the drive with a maximum of seven other SCSI
devices (including the host) that have single-ended drivers and receivers
using a common cable. SCSI ID 7, by convention, is usually used for the
host adapter. No drive can have the same SCSI ID as the host adapter.
All signals are common between all SCSI devices. The SCSI devices at
both ends of the daisy-chain must be terminated; the intermediate SCSI
devices should not be terminated.
The 50-conductor, nonshielded mating cable connector consists of two
rows of 25 female contacts with adjacent contacts 0.100 inches apart.
The recommended mating cable connector part numbers are shown in
the table below. The mating cable is shown in Figure 2 on page 16.
The following table shows 3M

connector part numbers for interface
cable connectors compatible with the drive. These connectors do not
have a center key; they are available with or without a strain relief.
No strain relief
No center key With strain relief
No center key
Closed end
(for cable ends) 3M
3425-7000 3M
3425-7050
Open end
(for daisy-chain) 3M
3425-6000 3M
3425-6050
The following table shows Molex

connector part numbers for connec-
tors that have a center key.
Closed end
(for cable ends) Molex
39-51-2504
Open end
(for daisy-chain) Molex
39-51-2501
Two strain reliefs, shown in the following table, are available for the
connectors referred to in the previous table.
Molex strain relief,
preferred version
in Europe Molex 90170-0050
Molex strain relief,
preferred version
in Japan Molex 15-25-1503
ST3655 Family SCSI Drives Product Manual, Rev. A 15