Dc Power Supply Wiring And Grounding - RuggedCom RUGGEDSWITCH RS900G Hardware Installation Manual

2. Installation

2.2.2. DC Power Supply Wiring and Grounding

Figure 2.3. DC Power Supply Wiring and Grounding
The RS900G 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.
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.
RuggedCom® RuggedSwitch™ 12 RS900G Installation Guide Rev 107