4.5.1.4 Ports of the X308-2M PoE
PoE ports of SCALANCE X‑300M PoE switches
As a PSE, the PoE switch supplies PoE-capable devices with power over Ethernet. The 48 V
power required to supply the powered devices is generated internally on the switch, no extra
power supply unit is necessary.
The PoE switch uses "alternative A" for this. Per RJ-45 port, a maximum of 15.4 W are available
for supplying a PoE-compliant device. If a Cat5/Cat5e cable with a maximum length of 100 m
is used, the connected device can be supplied with a power of 12.95 W.
Note
The total power provided by the switch on all four PoE ports is a maximum of 30.8 W.
The PoE ports meet the conditions listed in the IEEE 802.3af / IEEE 802.3at standard (type 1)
for environment A , in other words power supply over Ethernet within a power supply system.
For details of configuring and enabling PoE for individual ports, refer to the configuration
manual SCALANCE X-300 / X-400 on the accompanying CD.
4.5.1.5 PoE ports
PoE ports of SCALANCE XR‑300M PoE switches
As a PSE, the PoE switch supplies PoE-capable devices with power over Ethernet. The power
required to supply the powered devices is generated internally on the switches, no extra power
supply unit is necessary.
The PoE switch uses "alternative A" for this. Per RJ-45 port, a maximum of 15.4 W are available
for supplying a PoE-compliant device. If a Cat5/Cat5e cable with a maximum length of 100 m
is used, the connected device can be supplied with a power of 12.95 W.
Note
The total power provided by the switch on all eight PoE ports is a maximum of 53.2 W.
The PoE ports meet the conditions listed in the IEEE 802.3af / IEEE 802.3at standard (type 1)
for environment A , in other words power supply over Ethernet within a power supply system.
For details of configuring and enabling PoE for individual ports, refer to the configuration
manual SCALANCE X-300 / X-400 on the accompanying CD.
Description of the device
4.5 Interfaces and signaling contact of the switches
SCALANCE X-300
Operating Instructions, 11/2019, A5E01113043-24 91
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