Siemens SCALANCE X-200RNA Operating Instructions Manual page 18

Network topologies and redundancy
3.1 PRP
The SCALANCE X-200RNA can manage a maximum of 1023 MAC addresses.
Note
Keep to the maximum permitted cable lengths of the devices you are using. You will find the
permitted cable lengths in the technical specifications.
Example
Figure 3-1
With the "Parallel Redundancy Protocol" (PRP), each node must transmit Ethernet frames on
two independent, parallel networks. These are two physically separate networks with a bus
(linear), star or ring topology. The PRP destination device must also be connected to the two
networks. This then receives each frame twice. The first frame is forwarded to the application.
18
Schematic diagram of the "Parallel Redundancy Protocol"
Operating Instructions, 10/2016, C79000-G8976-C342-04
SCALANCE X-200RNA