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DISK DRIVE CONTROLLER
SG
AO
BO
SG
A1
B1
SG
An
Bn
S~
A
1;-
~~
A
1;-
S~
A
IB ....
*TERM
*TERM
*TERM
DISK DRIVE
DISK DRIVE
---
DISK DRIVE
a
1
4
(maximum)
* TERMINATING RESISTORS INSTALLED ON EACH DRIVE
Figure 1-6 Radial System Configuration
1.5 RELATED DOCUMENT
For additional information on the D2246 disk drive, refer to the D2246 8-Inch Winchester
Disk Drive Product Description (NEC document 819-000080-4001).
1.6 SPECIFICATIONS
Product specifications are listed in Appendix B.
1.7 OPTIONS
Table 1-2 lists available options for the D2246 disk drive.
Table 1-2 Available Options
OPTION
DESCRIPTION
3-Input DC Regulator Option
Supplies internal dc "power set" (+24 V,
+ 12 V, +5 V, -5 V, -12 V) from external dc
input of +24 V, +5 V, and -12 V.
Dual-Port Option
!
Enables disk drive interface with two con-
I
trollers.
!
\.
DC Power Supply
I
Supplies internal dc "power set" from ac
input power. Provides power for two disk
drives.
Diagnostic Panel
I
Tests and monitors disk drive operation.
1-7
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