Assortment / System Description
96
KNX network
A fully extended KNX network has a 3-level structure. Area line 0 forms the net-
work’s backbone.
From each area line, 15 main lines (area 1…15) branch off via area couplers (Ac),
and from each main line 15 lines (lines 1…15) branch off via line couplers (Lc).
1
2
3
64
1
2
3
64
1
2
3
64
1
2
3
64
1
2
3
64
1
2
3
64
1
2
3
64
Linie 1
Linie 2
Linie 3
1
2
3
64
1
2
3
64
1
2
3
64
1
2
3
64
Linie 1
Linie 2
Linie 3
1
2
3
64
1
2
3
64
1
2
3
64
1
2
3
64
1
2
3
64
1
2
3
64
Ac
1.0.0
Lc
1.1.0
Lc
1.2.0
Lc
1.3.0
Lc
1.15.0
Area 1
Line 1
Line 2
Line 3
Line 15
Main line 1
Lc
0.1.0
Lc
0.2.0
Line 1
Line 2
Ac
2.0.0
Lc
2.1.0
Lc
2.2.0
Lc
2.3.0
Area 2
Line 15
Main line 2
Ac
3.0.0
Lc
3.1.0
Lc
3.2.0
Lc
3.3.0
Lc
3.15.0
Area 3
Line 15
Main line 3
Ac
15.0.0
Lc
15.1.0
Lc
15.2.0
Lc
15.3.0
Area 15
Line1
Line 2
Line 3
Main line 15
A
r
e
a
l
in
e
0
(
b
a
c
k
b
o
n
e
l
i
n
e
)
3127Z10en
Lc
2.15.0
Notes: Synco devices and devices supplied by thirds integrated in a KNX network are also termed
"bus devices". Bus devices are assigned network addresses.
The factory-set area/line address 0.2 of Synco devices corresponds to the area highlighted
in grey in the above illustration. This means that without area and line couplers, the network
structure remains limited to area 0, line 2, that is, to one
line.
In the following cases, area and line couplers are required in extensive KNX
networks with large numbers of bus devices:
• The KNX network includes more than 64 bus devices
• Creation of "communication islands", aimed at keeping data traffic across
areas or lines in the network as low as possible
5WG1 140-1AB13, short type reference N140/13.
Bus connection to main line and line via terminals.
Area and line couplers
Siemens
area/line couplers