Connecting Ac Or Dc Power - Siemens SIMATIC NET RUGGEDCOM RSG908C Equipment Manual

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.
Note
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2.5.1

Connecting AC or DC Power

The device features dual power supply inputs to allow for redundant connections to
separate, independent 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:
Note
For examples of the supported wiring configurations, refer to "Wiring
Examples" (Page 15).
Electrocution hazard – risk of personal injury
When only one AC/DC power source is connected to the device, the redundant
power terminals (between the positive/live and chassis/ground terminals, and
between the negative/neutral and chassis/ground terminals) are energized. To
prevent contact with the terminals and avoid an electrical shock, do the following
when one AC/DC power source is connected to the device:
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1.
2.
RUGGEDCOM RSG908C
Equipment Manual, 11/2023, C79000-G8976-1404-15
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
standards.
WARNING
Make sure a terminal block is installed in the unused port and that any wires
from the secondary terminal block are properly terminated
Make sure the first power source is off before connecting (or disconnecting) a
second power source
If connecting a secondary power source, make sure the power source currently
connected to the device is disabled (e.g. power cable is unplugged from the wall
receptacle).
Insert the appropriate terminal block(s) into the device and tighten both screws.
Installing the Device
2.5.1 Connecting AC or DC Power
13