IBM 520Q User Manual
Chapter 2. Architecture and technical overview
45
Figure 2-12 RIO-2 connections
The RIO-2 cables used have different lengths to satisfy the different connection
requirements:
requirements:
Remote I/O cable, 1.2 m (FC 3146)
Remote I/O cable, 1.75 m (FC 3156)
Remote I/O cable, 2.5 m (FC 3168)
Remote I/O cable, 3.5 m (FC 3147)
Remote I/O cable, 10 m (FC 3148)
2.8.3 7311 Model D20 I/O drawer SPCN cabling
The SPCN is used to control and monitor the status of power and cooling within the I/O
drawer. The SPCN is a loop, the cabling starts from SPCN port 0 on the p5-520 or p5-520Q
system to SPCN port 0 on the first I/O drawer. The loop is closed connecting the SPCN port 1
of the I/O drawer back to the port 1 of the p5-520 or p5-520Q system. If you have more than
one I/O drawer, you continue the loop connecting the following drawer (or drawers) with the
same rule.
drawer. The SPCN is a loop, the cabling starts from SPCN port 0 on the p5-520 or p5-520Q
system to SPCN port 0 on the first I/O drawer. The loop is closed connecting the SPCN port 1
of the I/O drawer back to the port 1 of the p5-520 or p5-520Q system. If you have more than
one I/O drawer, you continue the loop connecting the following drawer (or drawers) with the
same rule.
Figure shows SPCN cabling examples.
PCI-X slots
I/O drawer #1
I/O drawer #2
I/O drawer #3
I/O drawer #4
FC 2888
PCI-X slots
I/O drawer #1
I/O drawer #2
I/O drawer #3
I/O drawer #4
FC 2888