Siemens RUGGEDCOM RS900

Installing the Device
2.5Connecting Power
2. Connect a failsafe device to the terminal block.
1 2 3
1
Normally Closed
2
Common
3
Normally Open
Figure2.5 Failsafe Alarm Relay Wiring
2.5 Connecting Power
The RUGGEDCOM RS900 supports power input from a single high AC/DC or low DC
power supply.
IMPORTANT
• 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.
• All line-to-ground transient energy is shunted to the Surge Ground terminal. In
cases where users require the 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 RS900
Installation Manual, 12/2020, C79000-G8976-1024-12
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