Samsung WA31273A Technical Manual page 19

4-3-3 Ventilation
The Winner 3A WA31273A / WA32543A / WA33203A / WA32163A / WA31083A,
Winner 2A WA32162A hard disk drive operates without 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
4-4-1 DC Power Connector(J7)
The drive's DC power connector (J7) is mounted on the back edge of the Printed Circuit
Board (PCB) see to Figure 4-4. Table 4-1 lists the pin assignments.
4-4-2 AT-Bus Interface Connector (J2)
The AT-Bus interface connector (J2) on the drive connects the drive to an adapter or an
on board AT adapter in the computer. J2 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 possibility of incorrectly installing the I/F cable, the connector has been
keyed by the removal of Pin #20. The connecting cable is a 40-conductor flat ribbon
cable and the maximum cable length is 0.46m (18 inches).
For pin assignments and signal descriptions, see "AT INTERFACE and ATA
COMMANDS" in Chapter 6.
WA31273A / WA32543A / WA33203A / WA32163A / WA31083A / WA32162A
Table 4-1. Power Connector (J7) Pin Assignment
PIN NUMBER
1
2
3
4
POWER LINE DESIGNATION
+12V DC
+12V Return (Ground)
+5V Return (Ground)
+5V DC
Installation and Operation
4-5