IBM i Series

Towers and Racks
266 iSeries Handbook
#0551 iSeries Rack
The #0551 iSeries Rack is an empty 1.8-meter rack which provides a total 36 EIA units of
space. The #0551can be ordered as a feature of an iSeries server as part of an initial order or
added at a later time. Specify codes may then be used to indicate how the rack is to be
populated. The #0551 iSeries Rack is available in these configurations:
• An empty #0551 Rack
• A #0551 Rack with one iSeries server 270
• A #0551 Rack with two iSeries server 270s
• A #0551 Rack with a #5074/#9079 PCI Expansion Tower
• A #0551 Rack with one to four #0578 PCI Expansion Units
The IBM configurator does not manage rack space in the #0551 rack.
Up to four Power Distribution Units (PDU) may be installed in the #0551. The PDUs may be
ordered as part of the initial order or added at a later time. Each PDU has six power sockets
that provide power for devices that support the #1422 PDU Line Cord. A country-specific line
cord must be ordered for each PDU to connect to external power. The supported PDUs are:
• #5160 Power Distribution Unit 1 Phase NEMA
• #5161 Power Distribution Unit 1 Phase IEC
• #5162 Power Distribution Unit 2 of 3 Phase
The supported specify codes are:
• #0121 270 Lower Unit in Rack Specify
– The #0121 is only valid on the initial order of an iSeries server 270. It indicates that
the server is to be installed in the lower position of a #0551 rack. The 270 server
occupies the lower 15 EIA units in the rack. This leaves 21 EIA units available at the
top of the rack for additional devices.
– Feature #7104 System Unit Expansion is required in order for an iSeries server 270 to
mount in a #0551 rack.
– The 270 server and the #7104 may be powered by the Power Distribution Unit (PDU),
if installed, using the #1422 PDU Line Cord. If no PDU is installed, a valid country
specific line cord must be ordered.
Note: Two line cords are required.
– Certain upgrade paths are not supported when an iSeries server 270 is installed in an
#0551 rack. Information on supported upgrade paths may be found in “Model 270
Upgrades” on page 130.
• #0122 270 Upper Unit in Rack Specify
– The #0122 is only valid on the initial order of an iSeries server 270 and indicates that
the server is to be installed in the upper position of a #0551 rack.