Installing the Device
2.6 Connecting Power
2
3
1
1
Normally Open
2
Common
3
Normally Closed
Figure 2.7
Failsafe Alarm Relay Wiring
2.6
Connecting Power
The RUGGEDCOM RS900GPF features an integrated low DC power supply that
accepts input from redundant power sources. Requirements for the power source(s)
is dependent on the IEEE 802.3 standard required by the application:
Input Range
Standard
Watts/Port
Output
Power
Supply Type
Minimum
Maximum
Isolation
Minimum
Power
Required
IEEE 802.3at
30
DC
51 VDC
57 VDC
1.5 VAC/2.2
kVDC
255 W
IEEE 802.3af
15
DC
45 VDC
57 VDC
1.5 VAC/2.2
kVDC
135 W
Note
For IEC 61850 compliance, use an IEC 61850 compliant PoE power supply with
power cabling no longer than 3 m (118 in).
Otherwise, Siemens recommends using the RUGGEDCOM RPS1300 switch-mode
AC power supply. For more information about this power supply, refer to
support.industry.siemens.com/cs/ww/en/view/109478699
.
Note
Power sources can be connected to either power supply terminal block on the device.
IMPORTANT
• Use minimum #16 gage copper wiring when connecting terminal blocks.
• Equipment must be installed according to applicable local wiring codes and
standards.
12
RUGGEDCOM RS900GPF
Installation Manual, 01/2021, C79000-G8976-1353-05
