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Specifications
Operating environment
Installation
±10°
Temperature
Operating
5 °C to 45 °C
(gradient 10° C/h or 18 °F/h)
Relative humidity
Operating
10 % to 90 % (no condensation)
Power supply and others
Power supply
+5 V ±5%, 0.8 A (typ.)
+12 V ±5%, 0.9 A (typ.)
41.3 × 146.0 × 203.0 mm (H×W×D)
Dimensions
(without Front Panel)
Weight
1.5 kg
Design and specifications are subject to change without
notice.
Compatible Media
SMO-F551-SD is compatible with the following 5 1/4 inch
(130 mm) Magneto Optical Disks.
Compatibility
Type
Description
ISO Standard
Read Write
®
®
8× R/W
5.2GB
2048 bytes/sector ISO/IEC 15286
®
®
8× R/W
4.8GB
1024 bytes/sector
®
®
8× R/W
4.1GB
512 bytes/sector
®
®
8× WO
5.2GB
2048 bytes/sector
®
®
8× WO
4.8GB
1024 bytes/sector
®
®
8× WO
4.1GB
512 bytes/sector
®
®
4× R/W
2.6GB
1024 bytes/sector ISO/IEC 14517
®
®
4× R/W
2.3GB
512 bytes/sector
®
®
4× WO
2.6GB
1024 bytes/sector
®
®
4× WO
2.3GB
512 bytes/sector
®
®
4× DOW
2.6GB 1024 bytes/sector
®
®
4× DOW
2.3GB
512 bytes/sector
®
®
2× R/W
1.3GB 1024 bytes/sector ISO/IEC 13549
®
®
2× R/W
1.2GB
512 bytes/sector
®
®
2× WO
1.3GB
1024 bytes/sector
®
®
2× WO
1.2GB
512 bytes/sector
®
®
1× R/W
650MB 1024 bytes/sector ISO/IEC 10089
®
®
1× R/W
594MB
512 bytes/sector
®
®
1× WO
650MB 1024 bytes/sector ISO/IEC 11560
®
®
1× WO
594MB
512 bytes/sector
W/R : Rewritable, WO : Write-Once, DOW : Direct Overwrite
Warning on Write operation on 1X-density disks
(650MB/1024bytes per sector or 594MB/512bytes
per sector, ISO/IEC 10089, 11560) and 2X-density
disks (1.3GB/1024bytes per sector or 1.2GB/
512bytes per sector, ISO/IEC 13549)
SMO-F551-SD can record on 1X and 2X-density disks
in addition to 4X and 8X-density disks on Write
operation.
All operation of SMO-F551-SD is guaranteed ONLY
upon usage of Sony disks.
Configuration and Location of Parts
System Configuration
SMO-F551-SD is connected to a host computer through its
SCSI interface. The maximum of seven peripheral devices
can be linked as a daisy chain on the SCSI bus.
Host Computer
SCSI Cable
SMO-F551-SD
SCSI peripheral devices
System Configuration Example
Location of Parts
This section provides a general description of the SMO-
F551-SD Magneto-Optical disk drive.
Front Panel
Disk Insertion Slot
BUSY Indicator
Eject Button
Emergency Eject Hole
Front View
Rear Panel
Functional Switch
SCSI Connector
DC Power Connector
GND Terminal
Rear View
SCSI and DC Power Connector
The SCSI and DC Power Connector is located at the upper
rear of the drive. The drive uses a Molex 53450-5431
combination 50 pin SCSI and 4 pin DC Power male header.
Recommended female connectors:
SCSI connector: 3M type number 7950-6500
DC Power connector: AMP 1-480424-0 MATE-N-LOCK
Functional Switch
SCSI Connector
DC Power Connector
B1
B12
2
50
4
1
A1
A12
1
49
SCSI and DC Power Connector
Switch setting and Assignments
Functional Switch Connector Pin Assignments
A1
SCSI ID2
B1
GND
A2
SCSI ID1
B2
GND
A3
SCSI ID0
B3
GND
A4
Disable SCSI Parity
B4
GND
A5
Disable Write Cache
B5* Reserved
A6
Disable Auto Spin-up
B6* Reserved
A7
Force Verify for Write command B7* Reserved
A8
Disable Manual Eject
B8* Reserved
A9
Enable Fast SCSI
B9* Reserved
A10 Device Type
B10* Reserved
A11 Enable Termination
B11 GND
A12 Terminator Power
B12 Terminator Power Source
* This pin is NOT directly connected to the GND. Do not use this pin as
GND. SMO-F551-SD drives the signal to GND level depending on the
functional switch setting. Otherwise, the signal is not driven to GND
level.
WARNING: Write cache is enabled as default
setting. The integrity of the buffer memory content
is not guaranteed through power cycling.
Caution: "Disable Write Cache" setting works as an "OR"
function with the optional dip switch setting.
Caution: When the Fast SCSI function is used, it is
recommended that the host system and SCSI cables should
conform to the Fast SCSI.
DC Power Connector Pin Assignments
Pin Number
Description
1
DC +12V
2
+12V Return
3
+5V Return
4
DC +5V
Pin Assignments of SCSI Connector
Signal Name
Pin No.
Signal Name
GND
1
2
DB0
GND
3
4
DB1
GND
5
6
DB2
GND
7
8
DB3
GND
9
10
DB4
GND
11
12
DB5
GND
13
14
DB6
GND
15
16
DB7
GND
17
18
DBP
GND
19
20
GND
GND
21
22
GND
GND
23
24
GND
OPEN
25
26
(TERM PW)
GND
27
28
GND
GND
29
30
GND
GND
31
32
ATN
GND
33
34
GND
GND
35
36
BSY
GND
37
38
ACK
GND
39
40
RST
GND
41
42
MSG
GND
43
44
SEL
GND
45
46
C/D
GND
47
48
REQ
GND
49
50
I/O
The bar "—" above the signal indicates active low.
SCSI Terminator
SMO-F551-SD features an internal SCSI bus terminator.
When the drive is connected at the end of the SCSI chain,
functional switch #11 (Enable Terminator) may be used to
terminated the SCSI connection.
For a single ended cable, 50-signal conductor flat cable or a
25-signal twisted cable can be used. The cable length shall
not exceed six meters.
Optional Switch Setting
SMO-F551-SD features Optional Switch S501 and S502.
These two optional dip switches allow the user to set the
drive configurations.
Top Panel View
Optional Dip Switch Assignments
Optional Switch
Description
Switch
Number
1
Reserved
2
Reserved
3
Disable Command Eject
S501
4
Reserved
5
Reserved
6
Reserved
7
Disable Write Cache
8
Disable Auto Spin-up
1
Reserved
2
Reserved
3
Reserved
S502
4
Reserved
5
Disable SCAM Selection
6
Reserved
7
Reserved
8
Enable Write Cache for Write and Verify Command
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