Sony SMO-F551 Specifications, Switch setting and Assignments, Configuration and Location of Parts

Specifications Configuration and Location of Parts

Switch setting and Assignments

■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.)
Dimensions	41.3 × 146.0 × 203.0 mm (H ×W×D)
	(without Front Panel)
Weight	1.5 kg

Design and specifications are subject to change without notice.

■Compatible Media

SMO-F551 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	(working draft)
¨	¨	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

System Configuration

SMO-F551 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 SCSI peripheral devices

System Configuration Example

Location of Parts

This section provides a general description of the SMO- F551 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

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 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

SCSI Terminator

SMO-F551 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 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

The bar “—” above the signal indicates active low.