Seagate ST31200N, Руководство по эксплуатации продукта

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.485 Max.
.020 +/- .010
(square)
.157
+/- .010
.394 +/- .010
.0787
Typ.
.0787 Typ.
.157
+/- .010
Main
PCB
Product Manual - Hawk 1LP Family SCSI-2 (Volume 1), Rev. A 37
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10.2.1.3 Physical interface
The dimensions of the connector (J6) mounted on the Main PCB to interconnect the drives is shown in Figure
10.2.1-2. It is a 12 pin, 6 jumper position gold header type connector. Only pins 5 and 6 are used for connecting
the Reference Index signal cable, as shown in Figure 10.2.1-2. Pin 6 is and Pin 5 is ground.
Figure 10.2.1-2. Configuration select header specification (connector used has 12 pins)
10.3 Grounding
Signal ground (PCB) and HDA ground are connected together in the ST31200 drive and cannot be separated
by the user. The equipment in which the drive is mounted is connected directly to the HDA and PCB with no
electrically isolating shock mounts. If it is desired for the system chassis to not be connected to the HDA/PCB
ground, the systems integrator or user must provide a nonconductive (electrically isolating) method of
mounting the drive in the host equipment.
The interface physical characteristics for the “NC” models are given in Figure 11.6.3-1b and in Table 11.6.3-
1c. The signal (called “SYNC”) is included among the 80 pins of the I/O connector.