NonStop NS2200 Series Planning Guide

3 Site Preparation Guidelines for NonStop NS2200 Systems
This section describes power, environmental, and space considerations for a NonStop NS2200
system at your site.
Modular Cabinet Power and I/O Cable Entry
Power and I/O cables can enter the NonStop NS2200 system from either the top or the bottom
rear of the modular cabinets, depending on how the cabinets are ordered from HP and the routing
of the AC power feeds at the site. NonStop NS2200 system cabinets can be ordered with the AC
power cords for the PDUs exiting either:
• Top: Power and I/O cables are routed from above the modular cabinet.
• Bottom: Power and I/O cables are routed from below the modular cabinet.
NOTE: To provide redundancy, components are plugged into the extension bars on each
side of the rack.
For information about modular cabinet power and cable options, see “AC Input Power for Modular
Cabinets” (page 71).
Emergency Power-Off (EPO)
This section describes these EPO topics:
• “EPO Switches” (page 50)
• “EPO Requirement for NonStop NS2200 Systems” (page 50)
• “EPO Requirement for HP R5000 or HP R5500 XR UPS” (page 50)
• “EPO Requirement for HP R12000/3 UPS” (page 51)
EPO Switches
EPO switches are required by local codes or other applicable regulations when computer equipment
contains batteries capable of supplying more than 750 volt-amperes (VA) for more that five minutes.
Systems that have these batteries also have internal EPO hardware for connection to a site EPO
switch or relay. In an emergency, activating the EPO switch or relay removes power from all
electrical equipment in the computer room (except that used for lighting and fire-related sensors
and alarms).
EPO Requirement for NonStop NS2200 Systems
NonStop NS2200 systems without an optional UPS (such as an HP R5000 UPS) installed in the
modular cabinet do not contain batteries capable of supplying more than 750 volt-amperes (VA)
for more that five minutes, so they do not require connection to a site EPO switch.
EPO Requirement for HP R5000 or HP R5500 XR UPS
The rack-mounted HP R5000 or HP R5500 XR UPS is supported for a single-phase power
configuration. The UPS contains batteries, has an EPO circuit, and can be optionally installed in
a modular cabinet. For site EPO switches or relays, consult your HP site preparation specialist or
electrical engineer regarding requirements.
50 Site Preparation Guidelines for NonStop NS2200 Systems