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7-3
RI 45 PIII, Manual
C79000-G7076-C817-01
7.1.2
Connecting SCSI Devices
SCSI devices and the SCSI controller are connected via a common bus (SCSI
bus).
Termination (terminal resistance) must be enabled (or installed) on the SCSI
devices connected at the ends of the SCSI cable. Termination must be disabled
(or removed) on all other SCSI devices.
Your SCSI device documentation tells you how to enable or disable termination
on SCSI devices that have been added on later.
•
Make sure that termination is properly installed.
•
Connect the devices via the SCSI cable to the SCSI connector on the
system module.
•
T
he SCSI controller terminator must be disabled when you connect
devices with the external SCSI bus.
!
Caution
Only SCSI devices with a single ended interface may be connected to the
SCSI controller. Most SCSI devices meet this requirement. Contact your
supplier or our customer service staff if in doubt.
The integrated SCSI controller has the following connectors.
•
Internal 16-bit 68-pin connector socket (UW SCSI bus)
•
Internal 8-bit 50-pin connector plug (U SCSI bus)
•
4-pin LED connection plug
•
External 16-bit 68-pin connector socket (UW SCSI bus)
Only two of the controller’s SCSI connections may be assigned at the one
time.
The integrated hard disk is connected at the internal 16–bit connector.
Read “Connecting Other SCSI Devices” for more information on expanding
the system.
Connectors and
Cables
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 ...