ABB ABB-free home, System Manual

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05 Types of Devices ABB-free@home
®
50
│ System Manual
Binary inputs (Fig. 40)
With the aid of binary inputs, information of switch con-
tacts can be used outside the free@home system. For
example, window contacts can be integrated to switch off
the heating in the room automatically or to retract the
awning during the wind alarm of a weather station. The
type of sensor connected to the binary input must be
defined in the user interface.
Each binary input makes the following types of sensors
available for selection:
Push-button interface
Integrates a conventional switch or push-button.
Window contact
When connected with a room temperature controller the
heating is shut off when the window is open.
Rain alarm
When connected with a blind actuator it retracts the
blind/awning at a rain alarm.
Frost alarm
When connected with a blind actuator the blind/awning is
moved in/out.
Wind alarm
When connected with a blind actuator the blind/awning is
moved in (with wire-break protection, i.e. the wind alarm is
triggered when the contact is open).
Cold / warm switchover
When connected with a heating actuator the controller
switches between heating and cooling operation.