Siemens RXB Series Basic Documentation page 52

Point-to-point
connection
Multiple connections
IP Ac
1.0.0
N146
Main line 1
Lc
1.1.0
Area 1
IP router as area
coupler
52 / 88
Siemens
Building Technologies
With a "point-to-point connection", the Ethernet cable forms area line 0, regardless
of whether the coupling applies to two areas or lines (see figure) or one area with
one line.
A crossed Ethernet cable is required to couple two IP routers.
IP Lc
192.168.10.1
0.1.0
255.255.255.0
N146
0.1.1
0.1.2
0.1.3
0.1.x
A switch box is required for multiple IP router connections. As part of the IP
network, the switch box represents area line 0.
Use straight Ethernet cables to connect IP routers to the switch box.
IP network (Area line 0)
IP Ac
2.0.0
N146
Main line 2
Lc Lc
1.2.0 2.1.0
Area 2
KNX bus communications
Large plants
Ethernet cable (Area line 0)
IP Lc
0.1.0
N146
Lc
2.2.0
Line 1
0.2.0
Switchbox
IP Lc
0.2.0 3.0.0
N146
3.1.0
Line 2
Area 0
IP Lc
192.168.102
255.255.255.0
N146
0.2.1
0.2.2
0.2.3
0.2.x
IP Ac
N146
Main line 3
Lc Lc
3.2.0
Area 3
For internal use only
CE1P3127en
2013-04-08