ABB i-bus EIB

Planning and application
© 2006 ABB STOTZ-KONTAKT GmbH 245
ABB i-bus
®
EIB / KNX
4.2 Behaviour on bus voltage
failure
In the event of a bus voltage failure, the Application Unit Time stores the
communication object values of the inputs and outputs for at least 1 h. If the
bus voltage failure lasts considerably longer, the stored communication
object values are lost.
Secure states after a bus voltage failure can be achieved by selecting the
parameter setting “Behaviour after bus voltage recovery”.
4.3 Behaviour after bus
voltage recovery
To prevent an unwanted operational response after a bus voltage failure,
particular in larger installations, the installation of an uninterruptible power
supply is provided for the bus voltage and the scanning voltage of the
contacts.