NonStop NS2200 Series Planning Guide

For proper grounding/protective earth connection, consult with your HP site preparation specialist
or power engineer.
Power Consumption
In a NonStop NS2200 system, the power consumption and inrush currents per connection can
vary because of the unique combination of enclosures housed in the modular cabinet. Thus, the
total power consumption for the hardware installed in the cabinet should be calculated as described
in “Enclosure Power Loads” (page 73).
Uninterruptible Power Supply (UPS)
NOTE: A NonStop NS2200 commercial system supports the HP model R5000 or R5500 XR
UPS for a single-phase power configuration and the HP model R12000/3 UPS for a three-phase
power configuration.
Modular cabinets do not have built-in batteries to provide power during power failures. To support
system operation and ride-through support during a power failure, NonStop NS2200 systems
require either an optional UPS installed in each modular cabinet or a site UPS to support system
operation through a power failure. This system operation support can include a planned orderly
shutdown at a predetermined time in the event of an extended power failure. A timely and orderly
shutdown prevents an uncontrolled and asymmetric shutdown of the system resources from depleted
UPS batteries.
OSM provides this ride-through support during a power failure. When OSM detects a power
failure, it triggers a ride-through timer. To set this timer, you must configure the ride-through time
in SCF. For more information, see the SCF Reference Manual for the Kernel Subsystem. If AC power
is not restored before the configured ride-through time period ends, OSM initiates an orderly
shutdown of I/O operations and processors. For more information, see “AC Power Monitoring”
(page 75).
NOTE: Retrofitting a system in the field with a UPS and ERMs will likely require moving all installed
enclosures in the rack to provide space for the new hardware. One or more of the enclosures that
formerly resided in the rack might be displaced and therefore have to be installed in another rack
that would also need a UPS and ERMs installed. Additionally, lifting equipment might be required
to lift heavy enclosures to their new location.
For information and specifications on the UPS that is supported for a single-phase power
configuration, see Chapter 4 (page 56) and refer to the appropriate user guide:
• HP UPS R5000 User Guide at:
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c02945229/c02945229.pdf
• HP UPS R5500 User Guide at:
http://bizsupport.austin.hp.com/bc/docs/support/SupportManual/c00065453/c00065453.pdf.
For information and specifications on the R12000/3 UPS that is supported for a three-phase power
configuration, see Chapter 4 (page 56) and the HP 3 Phase UPS User Guide at:
http://bizsupport.austin.hp.com/bc/docs/support/SupportManual/c01079392/c01079392.pdf
52 Site Preparation Guidelines for NonStop NS2200 Systems