Installing the Device
2.5 Connecting Power
1
2
3
1
Normally Closed Terminal
2
Common Terminal
3
Normally Open Terminal
Figure 2.4
Failsafe Alarm Relay Wiring
2.5
Connecting Power
The RUGGEDCOM RS940GF supports a single integrated 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.
• 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.
IMPORTANT
Siemens requires the use of external surge protection in VDSL applications where
the line may be subject to surges greater than that for which the device is rated. Use
the following specifications as a guide for VDSL external surge protection:
• Clamping Voltage: 50 V to 200 V
• Insertion Loss: < 0.1 dB at 10 MHz
• Peak Surge Current: 10 kA, 8x20µs waveform
IMPORTANT
Use minimum #16 gage copper wiring when connecting terminal blocks.
RUGGEDCOM RS940GF
Installation Manual, 01/2021, C79000-G8976-1356-04
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