Page 91 - Advanced Course

KNX ADVANCED COURSE

1.3.1 Gate Logic
Simple KNX gate modules (implemented directly in the BCU 1) offer the possibility of
using more than 2 inputs in a gate in order to invert incoming and outgoing signals and to
define a send filter per output. In addition, applications with an external controller or
based on BIM M112 offer feedback loops and multiple cascading. These modules enable
several hundred input conditions to be linked into an output signal in an extreme case.

Input A INV

Input B INV
AND INV Send condition AND
output
Input H INV

INV General send condition

INV OR
OR INV Send condition output

INV

Figure 3: Example of a small logic module: 8 inputs can be wired up separately as AND or
OR gates

1.3.2 Partition Control

Partition control represents a special case for the KNX logic module. A range of input
signals that are dependent on a logical transmission matrix, are switched through to the
outputs. The result is that a variable number of output telegrams are produced from an
individual input signal. The term “partition control” derives from the fact that this
transmission logic is used for rooms with flexible usage and movable partitions. For
example, when partitions are used, each light switch can control the lighting separately.
When however the partitions are removed, several or all the lamps in the room can switch
the lighting.

Home and Building Management Systems KNX Association
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