7-13
RI 45 PIII, Manual
C79000-G7076-C817-01
7.4
Connecting Other SCSI Devices
7.4.1
Notes
The cable supplied with the product has 3 UW SCSI connections. The cable
end is plugged into the integrated SCSI drive.
The controller and the cable are terminated. If you want to connect up other
devices, observe the general information in Section 7.1.2.
You can connect up another two SCSI devices internally. Possible
expansions:
Number:
Internal
Type
ID-
Range
2)
Number:
External
Type
1)
ID-
Range
2)
1
UW
0-15
14
UW
0-15
2
UW
0-15
13
UW
0-15
3
UW
0-15
12
UW
0-15
1
UW
0-15
7
W
0-6
2
UW
0-15
7
W
0-6
3
UW
0-15
7
W
0-6
1)
UW means 16-bit SCSI, W means 8-bit SCSI
2)
ID 7 is intended for the SCSI controller
The customer is responsible for determining the extent to which the
connection of external SCSI devices is compatible with the device. Devices
with FCC, UL and CE labeling should be connected.
7.4.2
Terminating the AHA-2940 Ultra Wide
Termination on the AHA-2940Ultra Wide itself is controlled by software
comands via the SCSISelect utility. The default setting is set to Automatic.
When set to Automatic, if the AHA-2940Ultra Wide detects that SCSI cables
are connected to any of its three SCSI connectors, it automatically sets the
termination setting for the low and high bytes of the 16-bit Wide SCSI bus.
The low byte controls 8-bit SCSI; the low and high bytes together control
16-bit Wide SCSI.
We recommended that you leave the AHA-2940Ultra Wide set to its default
setting of Automatic. If you want to manually set the AHA-2940Ultra Wide
termination setting, see the chapters and this description. The following table
lists the termination configurations. Figures 7-2 and 7-3 show termination
examples for the AHA-2940Ultra Wide.
Device Connected to AHA-2940Ultra Wide
Low
High
68-pin internal connector only
ON
ON
68-pin external connector only
ON
ON
68-pin internal and 68-pin external connectors
OFF
OFF
50-pin internal connector only
ON
ON
50-pin and 68-pin internal connectors
OFF
ON
50-pin internal and 68-pin external connectors
OFF
ON
SCSI Option
Summary of Contents for SIMATIC RI 45 PIII Series
Page 6: ...vi RI 45 PIII Manual C79000 G7076 C817 01 Contents ...
Page 90: ...2 62 RI 45 PIII Manual C79000 G7076 C817 01 Motherboard ...
Page 96: ...3 6 RI 45 PIII Manual C79000 G7076 C817 01 Bus Board Operator Panel Sound Module ...
Page 108: ...6 6 RI 45 PIII Manual C79000 G7076 C817 01 Connecting Cables ...
Page 126: ...7 18 RI 45 PIII Manual C79000 G7076 C817 01 SCSI Option ...
Page 130: ...Index 4 RI 45 PIII Manual C79000 G7076 C817 01 Index ...
