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2008 RuggedCom Inc. All rights reserved Rev104
2.2.2 DC Power Supply Wiring and Grounding
Figure 2.2.2.1 DC Power supply wiring and grounding diagram
The RS900 low voltage DC power supply features reverse polarity protection and dual independent
inputs. This feature allows the connection of two DC sources with the same nominal voltage to
provide redundant power supply inputs. The DC source must be connected to the DC inputs
according to the polarity markings on the unit.
Notes:
1. Equipment must be installed according to the applicable country wiring codes.
2. Surge Ground should be connected to Chassis Ground via a braided cable or other
appropriate ground wire.
3. Chassis Ground must be connected to the protective earth.
4. All line-to-ground transient energy is shunted to the Surge Ground terminal. In cases
where users require the DC inputs to be isolated from ground, remove the ground braid
between Surge and Chassis Ground. Note that all line-to-ground transient protection
circuitry will be disabled.