Siemens SCALANCE XR-300WG, Руководство по эксплуатации

Страница: 33 / 100

Power source
• The device can supply energy consumers of the standards IEEE802.af Type 1, IEEE802.at
Type 2 or IEEE802.3bt Type 3.
• A power source can make provide a total of 210 W available (including line losses). The power
can be distributed to the ports as desired.
• The total PoE power available can be expanded to up to 570 W using up to two additional
SCALANCE PSR9230PoE power supply units. For more information, refer to section "PoE
power supply (power expansion) (Page 59)".
PoE ports
• The PoE ports are not isolated from each other. This means that they meet the conditions
named in Environment A (IEEE 802.3): Power supply over Ethernet within a power supply
system.
• The electrical isolation of the ports is designed for 1500 Vrms (1 minute).
• Ports P1 to P24 support PoE classes 0 to 4. They supply connected devices with up to 30 W
per port (according to IEEE802.3af and IEEE802.3at).
• Ports P25 and P26 support PoE classes 0 to 6. They supply connected devices with up to 60 W
per port (according to IEEE802.3af, IEEE802.3at and IEEE802.3bt).
Power
• The maximum output power can be configured, e.g. using the WBM.
• If the maximum power is exceeded, the supply is switched off port by port. The order in which
the ports are switched off depends on the priority of the ports. The priority can be
configured, e.g. using the WBM.
• If the device should provide more power than is available, e.g. due to an incorrect
configuration, the output voltage decreases. If the minimum permissible power according to
IEEE 802.3bt is fallen below, the supply is switched off port by port (according to priority).
4.7.3 Power transfer and pin assignment (ports P1 - P24)
The table below shows the most important power transfer and pin assignment for ports P1 to
P24.
Pin number Assignment
Pin 1 Negative power supply
Pin 2 Negative power supply
Pin 3 Positive power supply
Pin 4 -
Pin 5 -
Pin 6 Positive power supply
Pin 7 -
Pin 8 -
Description of the device
4.7 Power over Ethernet
SCALANCE XR-300WG
Operating Instructions, 03/2021, C79000-G8976-C454-07
33