Samsung 3.5" hard disk drives 用户手册

INSTALLATION 
 

SpinPoint V40 Product Manual

 

16

 

 
SpinPoint V40 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. 
 
 

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

Table 4-1 Power Connector Pin Assignment

 

1  

+12V DC 

2 

+12V Return (Ground) 

3 

+5V Return (Ground) 

4 +5V 

DC 

 
 

 
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 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.