Note: The minus sign next to a signal indicates active low.

The lines labeled RESERVED in the ‘A’ cable contact assignment tables shall be connected to ground in the bus terminator assemblies or in the end devices on the SCSI cable. The RESERVED lines should be open in the other SCSI

devices, but may be connected to ground. The RESERVED INTERFACE lines in this scanner are opened.

SCSI Bus (See ANSI SCSI-2 4.5)

Communication on the SCSI bus is allowed between only two SCSI devices at any given time. There is a maximum of eight SCSI devices. Each SCSI device has an SCSI ID bit assigned as shown in Figure 3.4.

 

DB(7)

DB(6)

DB(5)

DB(4)

DB(3)

DB(2)

DB(1)

DB(0)

 

 

 

 

 

 

 

 

 

SCSI ID

ID=7

ID=6

ID=5

ID=4

ID=3

ID=2

ID=1

ID=0

 

 

 

 

 

 

 

 

 

Figure 3.4 DATA BUS

M3099GX/GH OEM Manual

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