360
Planning, Installing, and Managing the IBM System x3950 M2
6.8.3 Comparing PDU and intelligent PDU
This section compares the PDU with the intelligent PDU (iPDU, or PDU+).
PDU
PDUs are engineered to split a power source to different power outlets so that
the power can be distributed to several systems. PDUs are either single-phase or
three-phase, and which one you use depends on the power sources you have to
attach it to.
Three-phase PDUs are more independent of power overload compared to
single-phase PDUs because the power is supplied by the three phases. The
outlets are combined to different load groups that are ideal for power redundancy.
Intelligent PDU
Intelligent PDUs (iPDU, with the IBM designation “PDU+”) can be remotely
managed and have an Ethernet or serial port for management. The PDU can be
accessed from a browser interface or through Telnet. Section 6.8.5, “Intelligent
PDU power management Web interface” on page 364 provides a description of
the Web interface.
The iPDU collects power and temperature data at the power outlets and can
send this information through SNMP. This data is collected once per second. You
can also view this data in table form from the iPDU Web interface or by using
tools such as IBM Active Energy Manager. They report power and thermal
trending also for devices that is plugged into their individual load groups.
Collecting of this data is independent of the devices that are connected, so
iPDUs are ideal for connecting older servers and systems that do not have their
own power and thermal monitoring capabilities.
EMEA, AP, LA
40K9613
N/A
IBM DPI 63A cord
IEC 309 P+N+G
250 V 63A
US, Canada
40K9614
6500
4.3m, 30A/208V,
NEMA L6-30P
208 V 30A
US, Canada
40K9615
6501
4.3m, 60A/208V,
IEC 309 2P+G
208 V 60A
Australia, NZ
40K9617
N/A
IBM DPI 32A cord
IEC 309 P+N+G
250 V 32A
Korea
40K9618
N/A
IBM DPI 30A cord
IEC 309 P+N+G
250 V 30A
Geography
Part number
FC
Description
Connector
Power source
Tip:
We recommend you distribute the power cables to load groups that are
joined to different phases, to ensure even greater power redundancy.
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