Power Connections Overview
007-5832-002 3
long as there is power coming into the unit. Turn off the PDU breaker switch on each of the
PDUs that supply voltage to the IRU’s power supplies if you want to remove all power from
the unit.
Important: In a system configuration using 2-outlet single-phase PDUs, each power supply
in an IRU should be connected to a different PDU within the rack. This will ensure the
maximum amperage output of a single PDU is not exceeded if a power supply fails.
Figure 1-1 IRU Power Supply Cable Location Example
3. If you plan to power on a server that includes optional mass storage enclosures, make sure
that the power switch on the rear of each PSU/cooling module (one or two per storage
enclosure) is in the
1 (on) position.
4. Make sure that all PDU circuit breaker switches (see the examples in the following three
figures) are turned on to provide power to the server when the system is powered on.
Figure 1-2 shows an example of a single-phase 2-plug PDU that can be used with the SGI UV
2000 system. This PDU can be used to distribute power to the IRUs when the system is configured
with single-phase power.
Power cord
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