Application And Planning; The Three Operating Modes - ABB i-bus EIB Product Manual

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ABB i-bus EIB / KNX
3 Application and
planning
3.1 The three operating
modes
© 2004 ABB STOTZ-KONTAKT GmbH

Application and planning

It is possible to choose between three operating modes for each output:
1.
Switch actuator
This function is used for normal switching e.g. of lighting. The output is
controlled directly via the object "Switch". A large number of additional
functions are possible. See under section 3.2 for further explanations.
2.
Heating actuator
In this function, the output is used to control heating valves e.g. in an
individual room temperature control system. A room thermostat sends a
control value which the output uses to control the valve (e.g. as PWM or
2-step control). See under section 3.3 for further explanations.
3.
Fan coil control
This function is used to control a fan coil unit for air conditioning in a
room e.g. in an individual room temperature control system.
The function is as follows: An external room thermostat determines the
setpoint value (0...255). The fan speed and the setpoint value of the fan
coil unit are to be controlled depending on this setpoint value. Several
outputs are required for control and the output therefore controls further
outputs ("Slaves") as a "Master" via the bus. The master-output itself
controls fan speed 1. See under section 3.4 for further explanations.
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