Gira KNX room actuator

Gira KNX room actuator

The Gira KNX room actuator controls electrical devices from a maximum of three different functions – such as lighting, blinds and heating – within a single device. Corresponding constellations are used in the living room, office or hotel room. The room actuator’s four relay outputs can be set in pairs for blind operation or, alternatively, for switching operation in the ETS. Mixed operation is also possible.

The flexibility of the outputs thus permits room-oriented planning and execution of the electrical installation. The Gira room actuator's practice-oriented software is based on the functions of the familiar Gira switching and blind actuators, so that uniform programming is ensured in combination with other Gira actuators.

Blind operation

In blind operation, the room actuator uses its relay contacts to control electrically operated blinds, roller shutters, awnings, ventilation flaps, and similar hangings with a mains voltage of 230 V AC. The functional features that can be set via the ETS independently for all output channels include, in blind operation: separately parameterizable movement times, extended feedback functions, assignments of up to 5 different safety functions, a comprehensive sun protection function and integration into scenes and restraints.

Switching operation

In switching operation, the room actuator controls electrical devices such as lighting systems. The relay contacts are bi-stable, which means that the last set switching condition remains unchanged even if the power supply fails. Functional features for each output include for example a wide spectrum of time functions, logical links, scenes, blocking functions or alternatively restraints, extended feedback, cyclical monitoring of incoming switching telegrams and an elapsed operating time meter.

Room temperature control

Two further electronic switching outputs can additionally be assigned. These are used for silent control of electrothermic servos for heating or cooling systems. The following range of functions applies for each: Continuous correcting variable telegrams are implemented in a pulse width modulated output signal (PWM). This enables the servos to be continuously controlled. As an alternative, correcting variables can be implemented. Additional features include a status message for the valve position and cyclical monitoring of corrected variable telegrams.

Further details on room temperature control

  • Emergency mode in the event of bus voltage failure or bus/mains voltage recovery plus forced setting via bus telegram for summer and winter operation
  • Alarm message in the event of a short circuit or switch output overload and anti-jamming protection for the valves. De-energised closed or open valve drives can be connected.
  • Monitoring of mains voltage supply, and in cases of malfunction, the transmission of an alarm message on the bus
For both electronic switching outputs the status messages 'all valves are closed' and 'largest correcting variable' can be transmitted on the bus. This enables information to be further processed or displayed in other bus devices.

Technical data

Outputs A1–A4

Contact type

potential-free NO contact, bi-stable

Switching voltage AC

AC 230 V

Switching capacity AC1

16 A

Ohmic load

3.000 W

Capacitive load

16 A, max. 140 F

Outputs A5 and A6

Contact type

Semiconductor (Triac)

Switching voltage AC

AC 230 V

Switching current

5 mA to 50 mA

Number of drives per output

max. 4


DRA device with 4 HP

The delivery results subject to countries specific assortments

Switching actuators


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