Page 45 - Basic Course

KNX BASIC COURSE

4 Topology - Several areas

Area 15

BC 15
Hauptlinie Area 2
SV/Dr
BC 2
Hauptlinie Area 1
SV/Dr LK 1 LK 15
BC 1
PS/Ch
SV/Dr Main line SV/Dr
PS/Ch LK 1 LK 15
TLN 1 DVC 1
SV/Dr SV/Dr
LC 1 LC 15
TLN 1 DVC 1
PS/Ch PS/Ch
TLN 63 DVC 63
DVC 1 DVC 1
Linie 1 Line 15
1. Liniensegment 1st line segment
TLN 63 DVC 63

Linie 1 Line 15
1. Liniensegment 1st line segment
DVC 63 DVC 63

Line 1 Line 15
1st line segment 1st line segment

Figure 4: several areas

If more than 1,000 bus devices are to be connected in an installation or in order to have a
clear line structure in larger installations, the TP installation can be extended by mounting
backbone couplers (BC) via the backbone line.

It is also possible to mount bus devices in the backbone line (own power supply required).
The maximum number of bus devices in the backbone line decreases by the number of
backbone couplers used.

Within a maximum of 15 possible areas, in the default topology approximately 15,000 bus
devices can be connected to the bus system and in the extended topology (with line
repeaters) approximately 58,000.

By dividing the KNX TP installation into lines and areas, the functional reliability is
increased considerably.

Home and Building Management Systems KNX Association
KNX TP Topology Topology_E1213a 6/24