Seagate ST15150DC, Руководство по эксплуатации продукта

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56 ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D
10.2.1.2 Termination
The reference index signal (SSREF
+
) is terminated with a 2.21K ohm
resistor. Each single-ended drive has a terminator resistor located on the
main PCB. The terminator resistor is not removable and is always in the
circuit. A diode prevents current from backfeeding.
10.2.1.3 Physical interface
Dimensions of the J04 (J4) connector mounted on the main PCB of
ST15150N/ND drives to interconnect the drives are shown in Figure 26. The
connector is a 22-pin, 11-position gold 2 mm header type. Only pins 1 and
2 are used for connecting the reference index signal cable, as shown in
Figure 20. Pin 1 is SSREF+ and pin 2 is ground.
Figure 26. ST15150N/ND drives configuration select header specification
Dimensions of the J5 connector mounted on the main PCB of ST15150W/WD
drives to interconnect the drives are shown in Figure 27. The connector is
a 12-pin, 6-position gold 2 mm header type connector. Only pins 11 and 12
are used for connecting the reference index signal cable, as shown in
Figure 22. Pin 11 is SSREF+ and pin 12 is ground.
Figure 27. ST15150W/WD drives configuration select header specification
.866
(22 mm)
.079 (2 mm)
.079
(2 mm)
.787
(20 mm)
J04
J5
Pin 1
.079
(2 mm)
.079
(2 mm)
.520
(13.2 mm)
.185
(4.7 mm)