NonStop NS16000 Series Planning Guide (H06.11+)

2 Site Preparation Guidelines
This section describes power, environmental, and space considerations for your site.
Modular Cabinet Power and I/O Cable Entry
Power and I/O cables can enter the Integrity NonStop NS16000 series server 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. Integrity NonStop NS16000 series 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: If your system includes the optional rackmounted UPS, the modular cabinet will have
one PDU located on the rear right side and four extension bars on the rear left side. To provide
redundancy, components are plugged into the right-side PDU and the extension bars. Each
extension bar is plugged into the UPS. The rackmounted UPS AC input power cord is routed
as described above, and the large output receptacle is unused.
For information about modular cabinet power and cable options, refer to Chapter 3 (page 37).
Emergency Power-Off Switches
Emergency Power Off (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 Integrity NonStop NS16000 Series Servers
Integrity NonStop NS16000 series servers without the optional rackmounted UPS installed in each
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 5000 UPS
The rackmounted HP 5000 UPS that can be optionally installed in a modular cabinet contains
batteries and has an EPO circuit. For site EPO switches or relays, consult your HP site preparation
specialist or electrical engineer regarding requirements.
If an EPO switch or relay contactor is required for your site, contact your HP representation or refer
to the HP UPS R5000 User Guide for connector and wiring.
EPO Requirement for HP 5500 XR UPS
The rackmounted HP 5500 XR UPS that can be optionally installed in a modular cabinet contains
batteries and has an EPO circuit. For site EPO switches or relays, consult your HP site preparation
specialist or electrical engineer regarding requirements.
If an EPO switch or relay contactor is required for your site, contact your HP representation or refer
to the HP UPS R5500 User Guide for connector and wiring.
EPO Requirement for NonStop S-Series I/O Enclosure
Each NonStop S-series I/O enclosure contains batteries and an EPO circuit. If an EPO switch or
relay contactor is required for your site, contact your HP representation or refer to the NonStop
32 Site Preparation Guidelines