Kontron OmniClient - Manual (Page 26)

OmniClient –User’s Guide (V1.02)
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7.5.1.2. If DC power supplies are installed
Connection with a DC (Direct Current) source should only be performed by trained service
personnel. The OmniClient with DC input is to be installed in a Restricted Access Location in
accordance with articles 110-26 and 110-27 of the National Electric Code, ANSI/NFPA 70. The DC
source must be electrically isolated from any hazardous AC source by double or reinforced
insulation. The DC source must be capable of providing up to 300 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: This server is intended for installation with an isolated DC return (DC-I and
is to be installed in a Common Bonding Network (CBN) per NEBS GR-1089). To avoid an electrical
shock hazard, you must reliably connect an earth grounding conductor to the server. The earth
grounding conductor must be a minimum of 16 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 input connector on the DC power supply is a 2-pin terminal block (barrier strip). This
connector is rated at 16A/pin. Figure 61, the input connector mechanical drawing and table,
show the DC input power connector and pin-out. Please note that the terminal block is polarity is
identified by a “+” for the DC Positive and a “-“ for the DC Negative (RTN).
WARNING: DO NOT CONNECT THE POSITIVE TO THE “-“ OR THE RTN TO THE ”+”
Figure11. DC Power Supply Input Connector (Terminal Block)
Table 4. DC power supply connections
Pin # Description
- RTN
+ +24VDC (18-36VDC)