Kontron NSW1U IP Network Server - Manual (Page 95)

Kontron IP Network Server NSW1U
December 2009 Product Guide, rev. 1.4
95
Safety Information—NSW1U Network Server
Overcurrent protection: The server is designed for an AC line voltage source with up to 20 Amperes of
overcurrent protection per cord feed. If the power system for the equipment rack is installed on a
branch circuit with more than 20 Amperes of protection, you must provide supplemental protection
for the server. The overall current rating of a configured server is less than 6 amperes.
Warning: Do not attempt to modify or use an AC power cordset that is not the exact type
required. You must use a power cordset that meets the following criteria:
• Rating: In the U.S. and Canada, cords must be UL (Underwriters Laboratories, Inc.) Listed/CSA
(Canadian Standards Organization) Certified type SJT, 18-3 AWG (American Wire Gauge). Outside
of the U.S. and Canada, cords must be flexible harmonized (<HAR>) or VDE (Verband Deutscher
Electrotechniker, German Institute of Electrical Engineers) certified cord with 3 x 0.75 mm
conductors rated 250 VAC.
• Connector, wall outlet end: Cords must be terminated in grounding-type male plug designed for
use in your region. The connector must have certification marks showing certification by an
agency acceptable in your region and for U.S. must be Listed and rated 125% of overall current
rating of the server.
• Connector, server end: The connectors that plug into the AC receptacle on the server must be an
approved IEC (International Electrotechnical Commission) 320, sheet C13, type female connector.
• Cord length and flexibility: Cords must be less than 4.5 meters (14.8 feet) long.
A.2.2 If DC Power Supplies are Installed
Connection with a DC (Direct Current) source should only be performed by trained service personnel.
The server with DC input is to be installed in a Restricted Access Location in accordance with articles
110-26 and 110-271 of the National Electric Code, ANSI/NFPA 70. The DC source must be electrically
isolated by double or reinforced insulation from any hazardous AC source. The DC source must be
capable of providing up to 7 Watts of continuous power per feed pair.
Mains DC power disconnect: You are responsible for installing a properly rated DC power disconnect
for the server system. This mains disconnect must be readily accessible, and it must be labeled as
controlling power to the server. The UL listed circuit breaker of a centralized DC power system may be
used as a disconnect device when easily accessible and should be rated no more than 10 Amps.
Grounding the server: To avoid the potential for an electrical shock hazard, you must reliably connect
an earth grounding conductor to the server. The earth grounding conductor must be a minimum 14
AWG connected to the earth ground stud(s) on the rear of the server. The safety ground conductor
should be connected to the chassis stud with a Listed closed two-hole crimp terminal having 5/8 inch
pitch. The nuts on the chassis earth ground studs should be installed with a 10 in/lbs torque. The
safety ground conductor provides proper grounding only for the server. You must provide additional,
proper grounding for the rack and other devices installed in it.
Overcurrent protection: Overcurrent protection UL listed circuit breakers must be provided as part of
each host equipment rack and must be incorporated in the field wiring between the DC source and the
server. The branch circuit protection shall be rated minimum 75Vdc, 10 A maximum per feed pair. If
the DC power system for the equipment rack is installed with more than 10 amperes of protection,
you must provide supplemental protection for the server. The overall current rating of a server
configured is 7 amperes.
A.2.3 Temperature and Ventilation
Caution: Temperature: The temperature, in which the server operates when installed in an
equipment rack, must not go below 5° C (41° F) or rise above 35° C (95° F). Extreme
fluctuations in temperature can cause a variety of problems in your server.
Caution: Ventilation: The equipment rack must provide sufficient airflow to the front of the
server to maintain proper cooling. The rack must also include ventilation sufficient to
exhaust a maximum of 1023 BTUs (British Thermal Units) per hour for the server. The