Cabling the CEC Drawer, Primary I/O Drawer, and Secondary I/O Drawer
The minimum system consists of two drawers. The CEC drawer contains the system
processors, memory and supporting hardware. The primary I/O drawer contains PCI
adapters, operator panel, disk drives, and media drives. The Model H80 and Models
6H0 and 6H1 must have one primary I/O drawer, which contains the service processor
for the system. The system supports up to two I/O drawers in various rack
configurations.
There are two steps to connecting the CEC drawer to the I/O drawers.
1. Connect the cables that only connect the CEC drawer and the primary I/O drawer,
such as the JTAG and the V/S COMM cable.
2. Connecting the cables that connect the CEC drawer and all the I/O drawers in
loops, such as the RIO cables and the SPCN cables.
All power cables connect to the PDU. If a second PDU is specified along with
secondary drawer power supplies for all drawers,the secondary power supplies connect
to the secondary PDU.
Connecting JTAG and VS COM Cables
Use the following figure to connect the JTAG and V/S COMM cables.
CEC Drawer Attached to I/O Drawer
JTAG
V/S COMM
V/S COMM
JTAG
Primary I/O
Drawer
CEC
Drawer
48 Service Guide
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