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Note 2: The current at start is the total 12 volt current required (ie the motor start current,
module current and voice coil retract current.
ELECTRICAL INTERFACE SPECIFICATIONS
The IBM OEM 0663 Disk Drive uses single-ended drivers and receivers that permit cable lengths
of up to 6 meters (19.68 feet).
Connectors
The drive has two connectors: one for power, the other for connecting to the SCSI bus.
Power
The DC power connector is designed to mate with a MOLEX AMP PN 1-480424-0 connector or
equivalent. Pin assignments are shown in Figure 2.
Figure 2 Power Connector Pin Assignments
SCSI Signal Connector
The SCSI signal connector is a 50-pin connector. Molex PN 70246 or equivalent, meeting
ANSI/SCSI specifications.
SCSI Bus Terminators
The drive has no internal SCSI bus terminators. The user is responsible for properly terminating
and powering the SCSI bus in the system.
AMP PN 88-4163-081-1, DATAMATE DM500-06-8, or equivalent external terminal may be
used.
Pin# 1
2
3
4
+5V GND GND +12V
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