IBM 520Q, P5 520

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:

򐂰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 port1

of the I/O drawer back to the port1 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