Technical specifications
8.8 XR-300M PoE technical specifications
SCALANCE X-300
Operating Instructions, 05/2016, A5E01113043-20
203
Accessory (plug, outlet,
TP cord)
Note
Permitted cable lengths (fiber-optic cable - Fast Ethernet or gigabit)
The values correspond to those of the permitted MM900 media
modules and SFP
Block architecture
Block architecture of the SCALANCE XR-300M PoE
The XR-300M PoE handles the Ethernet frame traffic of the 24 ports with the aid of three
switch blocks.
● The three switch blocks are connected in series (block 1 via block 2 to block 3).
● Gigabit wire speed is possible within a block (max. 8 ports per block).
● Between the blocks there is a bandwidth of 1 gigabit/s available,that must be shared by
all ports for frame traffic between the blocks.
When operating solely with Fast Ethernet (100 Mbps), the XR devices support full wire
speed via all blocks.
Image 8-5 Block architecture of the XR324-4M
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