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Building Technologies Basic documentation: Communication via the KNX bus CE1P3127en
HVAC Products Large plants 30.08.2007
With a point-to-point connection the Ethernet cable forms area line 0, irrespective
of whether the coupling applies to two areas or lines (see diagram) or one area
with one line.
A crossed
Ethernet cable is required for the coupling of two IP routers.
N146 N146
0.1.0 0.2.0
192.168.10.1
255.255.255.0
192.168.102
255.255.255.0
0.1.1
0.1.2
0.1.3
0.1.x
0.2.1
0.2.2
0.2.3
0.2.x
KNX
KNX
Ethernet cable (Area line 0)
IP Lc IP Lc
Line 1
Line 2
3127Z09en
For multiple IP router connections, a switch box is required. As part of the IP
network, the switch box represents area line 0.
Straight
Ethernet cables must be used when connecting IP routers to the switch
box.
1.0.0
KNX
1.2.01.1.0
3.0.0
KNX
3.2.03.1.0
2.0.0
KNX
2.2.02.1.0
0.1.0
KNX
0.2.0
KNX
Switchbox
Line 1
IP Ac
N146
Lc
Line 2
Lc
Line 1
IP Ac
N146
Lc
Line 2
Lc
Line 1
Lc
Liine 2
Lc
IP Lc
N146
IP Lc
N146
Main line 1 Main line 2 Main line 3
Area 1 Area 2
Area 0
Line 1 Line 2 Area 3
3127Z16en
IP network (Area line 0)
IP Ac
N146
Point-to-point
connection
Multiple connections
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