Siemens SCALANCE XR-300M PoE Series, Краткое руководство по эксплуатации

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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.
4.3 SET/SELECT button
The SET/SELECT button is located on the top of the housing of devices of the X-300 EEC series.
On all other devices, this button is on the front panel of the housing beside the LED display. The
SET/SELECT button has several functions that are described below.
Change the display mode
By pressing the button briefly, you change to the display mode of the LED display. For more
detailed information on this topic, refer to the section "LED display".
Resetting the device to the factory defaults
If you reset, all the changes you have made will be overwritten by factory defaults. Follow the
steps outlined below:
1. Turn on display mode A. Display mode A is active when the "DM" LED is not lit. If this LED is
lit or flashing, you will need to press the SET/SELECT briefly (possibly several times) until the
"DM" LED goes off. If the SELECT/SET button is not pressed for longer than a minute, the
device also turns on display mode A.
2. Hold down the SELECT/SET button for 12 seconds. If you release the button before the 12
seconds have elapsed, the reset is canceled.
Device description
4.3 SET/SELECT button
SCALANCE XR-300M PoE
Compact Operating Instructions, 03/2022, A5E02661178-15
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