Chapter 2. Architecture and technical overview
85
Figure 2-23 shows typical 12X I/O loop port connections.
Figure 2-23 Typical 12X I/O loop port connections
Table 2-25 shows various 12X cables to satisfy the various length requirements.
Table 2-25 12X connection cables
12X I/O Drawer PCIe SPCN cabling
System power control network (SPCN) is used to control and monitor the status of power and
cooling within the I/O drawer.
SPCN cables connect all AC powered expansion units. Figure 2-24 on page 86 shows an
example for a Power 750 or Power 760 connecting to four I/O drawers. Other connections
options are available.
1. Start at SPCN 0 (T4) of the system unit to J15 (T1) of the first expansion unit.
2. Cable all units from J16 (T2) of the previous unit to J15 (T1) of the next unit.
3. To complete the cabling loop, connect J16 (T2) from the final expansion unit, to the
SPCN 1 (T5) in the system unit.
4. Ensure that a complete loop exists from the system unit, through all attached expansions
and back to the system unit.
Feature code
Description
1861
0.6 meter 12X DDR cable
1862
1.5 meter 12X DDR cable
1865
3.0 meter 12X DDR cable
1864
8.0 meter 12X DDR cable
I/O
I/O
1
0
I/O
1
0
I/O
1
0
I/O
1
0
C
0
1
