Page 156 - Advanced Course

KNX ADVANCED COURSE

4.1 IP Router as Backbone Coupler
If an IP router is used as a backbone coupler with the physical address x.0.0 (e.g. 2.0.0),
no other IP routers may be used topologically “below” this IP router i.e. with a physical
address x.y.0 (y=1...15) (e.g. 2.1.0).

IP Network

KNXnet/IP KNXnet/IP
Router Router
1.0.0 2.0.0
4/1/1 4/1/1
Main Line 1 Main Line 2

LC LC LC LC LC
1.1.0 1.2.0 1.3.0 2.1.0 2.2.0
15/7/255 4/1/1 5/2/1 4/1/1
5/2/1

DVC DVC DVC DVC DVC
1.1.1 1.2.1 1.3.1 2.1.1 2.2.1
4/1/1 5/2/1 5/2/1 6/3/1 4/1/1

DVC DVC DVC DVC DVC
1.1.2 1.2.2 1.3.2 2.1.2 2.2.2
4/1/1 5/2/1 6/3/1

Figure 5: IP router as backbone coupler

Home and Building Management Systems KNX Association
Couplers Couplers_E1209b.doc 18/21