NEC D2246 Maintenance Manual page 22

8-inch winchester disk drive
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2.4.1 Installation Switch Assembly
The installation switch assembly, shown in Figure 2-7, sets the device address and
controls the power-on sequence. Segments 1, 2 and 5 are set to O.
Segments 3 and 4 assign the device address, a hexadecimal number from 0 to 3.
Segment 6 enables a 30-second delay in the start-up time of the spindle motor. This
segment can be used in dual-drive systems to insure that both drives do not overload the
power supply by simultaneously activating their power-up sequence.
Segment 7 is set to correspond to the mounting position of the drive.
Segment 8 places the D2246 in local or remote mode at power-on.
SETTOO
DEVICEADDRESS
t----....L-...J
I'
ON
o
OFF
~---f
START
-up
DELAY ENABLE
~----f
SET TO 0
Figure 2-7 Installation DIP Switch
2-5
1
REMOTE MODE
o
LOCAL MODE
1
VERTICAL
o
HORIZONTAL

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