12
4 X 2 SCSI MATRIX SWITCH
2.3.2 G
ENERAL
H
ARDWARE
D
ESCRIPTION
The 4 x 2 SCSI Matrix Switch’s rear panel identifies each of the independent SCSI
ports. SCSI ports A and B have two daisy-chained connectors per port, and SCSI
ports 1, 2, 3, and 4 have single connectors for installation of SCSI devices. You can
install the SCSI Switch at any point on the SCSI bus.
Each port has internal termination that can be turned on or off from the LCD
panel. External “termination power” for devices and terminators are provided by
internal resettable fuses.
The SCSI Switch does not require a device ID and is completely transparent to
all computers and peripherals on the SCSI bus. No additional software is needed
for installation and operation. A universal switching power supply auto ranges
input voltages between 105 VAC and 240 VAC.
2.3.3 U
LTRA
2 SCSI C
OMPATIBILITY
The SCSI Switch supports Ultra2 SCSI, 80-MBps (wide) SCSI host adapters,
computers, and peripherals in asynchronous and synchronous mode. The SCSI
Switch conforms to ANSI X3.131 and X3T9.2 specifications for single-ended
devices. Disconnect and reselect functions are fully supported to ensure complete
SCSI compatibility.
2.3.4 SCSI S
WITCH
I
NSTALLATION
Ports A and B are fully bi-directional to ports 1, 2, 3, and 4 (see
Figure 2-1
). You
determine where to connect computers, host adapters, and peripherals. In
general, if daisy-chained ports are required for connection to external peripherals,
use ports A or B. See
Figure 2-2
for a typical installation.
Summary of Contents for SC122A
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