Ventilation; Cable Connectors; Dc Power Connector; At-Bus Interface Connector - Samsung SP0401N Product Manual

INSTALLATION

4.3.3 Ventilation

SpinPoint P80 hard disk drives are designed to operate without the need of a cooling fan, provided the
ambient air temperature does not exceed 55ºC. Any user-designed cabinet must provide adequate air
circulation to prevent exceeding the maximum temperature.
4.4

Cable Connectors

The Interface/Power connector consists of three portions; a DC power connector, a configuration jumper
block, and the standard 40 pin AT-Bus Interface connector.

4.4.1 DC Power Connector

The DC power connector is mounted on the back edge of the Printed Circuit Board (PCB)
(Figure 4-4). Table 4-1 lists the pin assignments.

4.4.2 AT-Bus Interface Connector

The AT-Bus interface connector on the drive connects the drive to an adapter or an on-board AT adapter in
the computer. JHST is a 40-pin Universal Header with two rows of 20 pins on 100-mil centers, as shown in
Figure 4-4.
To prevent the incorrect installation of the I/F cable, the connector has been keyed by the removal of Pin #20.
The connecting cable is a 40-conductor or a 80-conductor flat ribbon cable, and the maximum cable length is
0.46m (18 inches).
For pin assignments and signal descriptions, see Chapter 6, AT Interface and ATA Commands.
SpinPoint P80 Product Manual Rev. 01

Table 4-1 Power Connector Pin Assignment

Pin Number
1
2
3
4
Power Line Designation
+12V DC
+12V Return (Ground)
+5V Return (Ground)
+5V DC
16