Kontron CG2200 Carrier Grade Server - Manual (Page 110)

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Kontron CG2200 Carrier Grade Server Installation and Maintenance Guide
Figure 62: DC Power Supply Mating Connector
9.2.4 DC Power Supply Earth Grounding Studs on Chassis
For instructions about how the safety earth grounding wire is attached to the chassis for use with DC
power supplies, see Figure 33, ”DC Power Supply Grounding” in the “Adding a Second Power Supply
Module” section.
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 15 amps.
Grounding the server: This server is intended for installation with an isolated DC return (DC-I per NEBS
GR-1089, Issue 3). 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 12 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 of 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.
9.2.5 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 75 VDC, 15A maximum per feed pair. If the DC power system for the
equipment rack is installed with more than 15 amperes of protection, you must provide supplemental
protection for the server. The overall current rating of a maximum configured server is 13 amperes.
9.2.6 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 40°C (104°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 rack selected and the ventilation
provided must be suitable to the environment in which the server will be used.
9.3 Safety Cautions
Read all caution and safety statements in this document before performing any of the instructions.