Installing the Device
2.6 Connecting Power
The RUGGEDCOM RSG909R features two input terminals that allow the device to be
Electrical hazard – risk of power disruption
Due to power supply safety features, some AC voltage will be coupled to the
redundant power terminals (between the positive/live and chassis/ground terminals,
and between the neutral and chassis/ground terminals). While the maximum
amount of current transfer is below the safety threshold, it may be enough to trip
some external Ground Fault Circuit Interrupter (GFCI) breakers. Before connecting
power, review the installation and make sure this condition can be supported.
Connecting AC or DC Power
The device features dual power supply inputs to allow for redundant connections to
separate, independent AC or DC power supplies. Each power supply terminal block
provides reverse polarity protection.
To connect an external AC or DC power source to the device, do the following:
For examples of the supported wiring configurations, refer to
Electrocution hazard – risk of personal injury
When only one AC power source is connected to the device, the redundant power
terminals (between the positive/live and chassis/ground terminals, and between the
neutral and chassis/ground terminals) are energized. To prevent contact with the
terminals and avoid an electrical shock, do the following when one AC power source
is connected to the device:
Up to one independent AC and one independent DC power source
Two independent DC power sources
For 110/230 VAC rated equipment, an appropriately rated AC circuit breaker
must be installed.
For 125/250 VDC rated equipment, an appropriately rated DC circuit breaker
must be installed.
Use minimum #16 gage copper wiring when connecting terminal blocks.
Equipment must be installed according to applicable local wiring codes and
"Wiring Examples (Page
Installation Manual, 02/2021, C79000-G8976-1388-12