Page 206 - Advanced Course

KNX ADVANCED COURSE

2.4.2 Binary Input
Various applications can be implemented for use as a security and/or monitoring system.
The technical documentation of the manufacturer should be taken as a basis when
selecting the area of application of the binary input. Depending on the version, window
actuators have 1 or more channels for moving shutter motors as well as additional binary
inputs for combination with window contacts. The combination of a shutter that queries
whether the window is open/closed offers a variety of functions that can be implemented
(heating control, security and/or monitoring applications etc.).

Example 1: The contacts of the binary input are connected to the KNX power supply. It
can be parameterised that a signal is sent on the bus in the event of a falling pulse edge.
Depending on the parameter settings, this signal can be a fault signal to inform the user or
it can trigger an alarm. Alternatively, an existing auxiliary switch from the circuit breaker of
the power supply or another security-related system can be used. It should be noted that
the contact of an auxiliary switch is a “normally closed contact” (protection against wire
breakage).

Operation Overload Binary input

12 V battery module

Figure 11: KNX binary input connected to the remote signalling output of the KNX power
supply

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