ABB i-bus KNX Product Manual page 39

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ABB i-bus KNX
© 2008 ABB STOTZ-KONTAKT GmbH
Commissioning
State of switching on supply voltage failure
Options: Contact open
Contact closed
Contact unchanged
With this parameter the relay for the output can be set to a defined state at
a bus voltage failure.
The 1-10 V control output assumes a high resistance state with
a bus voltage failure.
Thus the lamps are controlled with a brightness value of 100 %.
A prerequisite is a closed relay contact of the output.
Note
Constant lighting control is no longer possible if the bus voltage fails.
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