Seagate Hawk 2 ST11900N, Product Manual

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Product Manual - Hawk 2 Family SCSI-2 (Volume 1), Rev. C 53
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Cable for “N” and “ND” model drives
Only nonshielded cable connectors are applicable. A 50 conductor flat cable or 25 twisted pair cable shall be
used. A minimum conductor size of 28 AWG should be used to minimize noise effects.
Suggested nonshielded flat cable part numbers are:
Flat cable - 35M-3365-50
Twisted pair - Spectra Twist in flat 455-248-50
Equivalent parts may be used.
Cable for “NC” drive models
The 80 pin connector option is intended for use on drives that plug directly into a PCB or wall/bracket mounted
connector in the host equipment. Cable mounted connectors would not be used in such a case. Installations with
cable mounted connectors are not recommended.
Mating connector for “NC” models:
The nonshielded mating connector shall be an 80 pin connector consisting of two rows of 40 male pins with
adjacent pins 50 mils (1.27 mm) apart. The connector is keyed by virtue of its shape. The characteristics of the
drive’s PCB mounted connector see Figure 11.6.3-1b. Recommended connectors for mating wall/bracket mounted
connectors are given in 11.6.3.
11.6.3 Connector requirements
11.6.3.1 Mating connectors for “N” and “ND” drive models
The nonshielded cable connector shall be a 50 conductor connector consisting of two rows of 25 female contacts
with adjacent contents 100 mils apart.
Recommended Mating Flat Cable Connector Part Numbers are:
Closed end 3M-3425-7000 W/O Strain Relief, No Center Key
(for cable ends)*3M-3425-7050 With Strain Relief, No Center Key
Dupont-66900-290 With Strain Relief, With Center Key
Open end 3M-3425-6000 W/O Strain Relief, No Center Key
(In Daisy-chain) 3M-3425-6050 With Strain Relief, No Center Key
Dupont-66900-250 With Strain Relief, With Center Key
*See Figure 11.6.3-2.
The drive device connector is a nonshielded 50 conductor connector consisting of two rows of 25 male pins with
adjacent pins 100 mils apart. The connector is keyed (see Figure 11.6.3-1).