2.8.3 Connecting External Poe Power - Siemens RUGGEDCOM RSG920P Installation Manual

3.
2.8.3 Connecting External PoE Power
The RUGGEDCOM RSG920P supports four 10/100/1000 Mbps Power-over-Ethernet
(POE) Ports that require external power.
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.
To support the IEEE 802.3at specification (30 W/port output), the external power
supply must meet the following requirements:
To support the IEEE 802.3af specification (15 W/port output), the external power
supply must meet the following requirements:
RUGGEDCOM RSG920P
Installation Manual, 04/2021, C79000-G8976-1172-07
Connect the ground wire to the chassis ground terminal on the device.
Power
Supply Type
Minimum
DC 51 VDC
Power
Supply Type
Minimum
DC 45 VDC
2.8.3 Connecting External PoE Power
Input Range
Maximum
57 VDC
Input Range
Maximum
57 VDC
Installing the Device
Isolation Minimum
Power Required
1.5 kVAC/2.2 kVDC
Isolation Minimum
Power Required
1.5 kVAC/2.2 kVDC
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135 W
75 W
21