Siemens SCALANCE X-300 Series User Manual

8.4.4 Block architecture
Block architecture with SCALANCE XR‑300 devices
The XR324-12M and XR324-4M handle 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.
1
P1 P2
2
P1 P2
3
P1 P2
4
P1 P2
5
P1 P2
6
P1 P2
7
P1 P2
8
P1 P2
9
P1 P2
10
P1 P2
11
P1 P2
12
P1 P2
1 2 3
1 Gbit/s
1 Gbit/s
Figure 8-1 Block architecture of the XR324‑12M
P1 P2
P3 P4
P5 P6
P7 P8
1
P1 P2
2
P1 P2
P9 P10
P11 P12
P13 P14
P15 P16
3
P1 P2
4
P1 P2
1 2 3
1 Gbit/s
1 Gbit/s
Figure 8-2 Block architecture of the XR324‑4M
Technical specifications
8.4 XR-300M technical specifications
SCALANCE X-300
Operating Instructions, 11/2019, A5E01113043-24 171

Siemens SCALANCE X-300 Series Specifications

General

Brand	Siemens
Model	SCALANCE X-300 Series
Category	Switch
Language	English