Connecting JTAG and Operator Panel Cables
Use the following illustration to connect the JTAG and operator panel (OP) cables.
Connecting RIO and SPCN Cables
The RIO and SPCN cables provide two functions in the models S80 and S85 system:
remote data bus connection and power control. The following rules must be followed
when connecting these two types of cables:
v The I/O drawers must be connected in a loop fashion for both the RIO cables and
the SPCN cables. The loop connection provides redundant paths so that if a failure
occurs in part of a cable, the system will continue to operate. If a failure occurs, a
warning message displays on the system console but the system continues to
operate.
v One loop is required for the SPCN cabling. This loop begins and ends at the system
rack.
v Two loops are possible for the RIO cabling depending on the number and desired
configuration of I/O drawers. These loops begin and end at the system rack.
OP
Front of System Rack
Rear of Primary
I/O Drawer (Drawer 0)
Rear of Primary
I/O Drawer (Drawer 0)
Rear of System Rack
Operator Panel
Connector
SAMI Port
Slot 8
Service Processor Connector
JTAG
Connector
32 Service Guide
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