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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
KN
X
KN
X
Ethernet cable (Area line 0)
IP Lc
IP Lc
Li
ne
1
Li
ne
2
31
27Z
09en
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
KN
X
1.2.0
1.1.0
3.0.0
KN
X
3.2.0
3.1.0
2.0.0
KN
X
2.2.0
2.1.0
0.1.0
KN
X
0.2.0
KN
X
Switchbox
Li
ne 1
IP Ac
N146
Lc
Li
ne 2
Lc
Li
ne 1
IP Ac
N146
Lc
Li
ne 2
Lc
Li
ne 1
Lc
Li
ine 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
31
27
Z1
6
e
n
IP network (Area line 0)
IP Ac
N146
Point-to-point
connection
Multiple connections