Page 47 - Basic Course
P. 47
KNX BASIC COURSE
6 Coupler - Gate function
Primary line
Line coupler or backbone coupler
Filter table
Secondary line
Figure 6: Coupler: gate function
When setting the parameters, a filter table can be loaded into a (line -/ or backbone
coupler). The filter table is created automatically in ETS during the planning & design
stage and contains the active line-crossing group addresses.
All received group telegrams are routed by the couplers if they are listed in the filter table.
In this way, each line works independently. Only line-crossing telegrams are routed.
The yellow LEDs on the coupler flicker when a telegram is received on the respective line.
The line repeater passes on all telegrams; it has no filter table.
Home and Building Management Systems KNX Association
KNX TP Topology Topology_E1213a 8/24
