Room temperature controller

When building a new house or renovating, you have numerous interesting options for organizing the control of the room temperature. We will tell you how you can use various bus systems such as KNX, radio or LCN in addition to the conventional temperature setting. Automation not only increases living comfort, but also contributes to the value of your building. This enables you to make necessary adjustments or changes even when you are not at home. This eibabo® catalog provides room temperature controllers for all common applications.

What are KNX room temperature controllers?

KNX room temperature controllers are part of a building's heating system. These are used for individual room temperature control of interior rooms and have various measuring ranges. The respective devices can differ significantly in terms of application and the functions provided for operation and comfort. For example, the differences are whether static heating surfaces or underfloor heating are to be controlled or whether air conditioning and ventilation functions are to be provided.

Do not confuse

Thermostats are also known as room temperature controllers. Installed on radiators, however, they measure the temperature at the heating and usually only differentiate between on and off.


KNX room temperature controllers, on the other hand, continuously control between 0 and 100 percent and use a heating actuator to communicate with the heating actuators.

How is the room temperature controlled using KNX?

A KNX room temperature controller determines the control difference between the target temperature and the actual temperature. The calculated control difference is sent as a 1-byte command value telegram (a value between 0 and 100 percent) via the KNX bus to the corresponding channel of a heating actuator. This processes the signal and then controls the actuator.

The following small example illustrates the rough functionality. The actual manufacturer specific control algorithm may be different:

The room temperature controller determines a current temperature of 18 degrees Celsius (controlled variable). However, the desired room temperature should be 22 degrees Celsius. The 22 degrees Celsius then represents the setpoint for the controlled variable. The resulting difference between the actual value and the setpoint is the control deviation. The control difference is 4 degrees Celsius and is used to determine the control variable that is to be used to influence the room temperature. Assuming the manipulated variable is 25%. This value is transmitted as a 1-byte telegram (0-255 = 0-100%) from the room temperature controller to the heating actuator. In this case 63.75. For example, the actuator takes 2 minutes to fully open. The time required for the respective actuator to open or close can be found in the data sheet for the thermoelectric actuator. This information must have been previously stored in the parameters of the actuator using Engineering Tool Software (ETS). With a command value specification of 25%, the actuator would switch on the actuator for 30 seconds (this corresponds to 25% of 2 minutes) and switch it off for 90 seconds. The actuator then switches on again for 30 seconds and so on. If the room temperature controller calculates and transmits a different command value specification, the switching cycle for the actuator also changes.

Source: eibabo®, Gira 210003 KNX continuous controllerImage: Gira 210003 KNX continuous controller

What is the difference between KNX continuous controllers, KNX object controllers and KNX room temperature controllers?

The selection of KNX temperature controllers is very large. eibabo® offers products from all leading manufacturers of control technology for HVAC (heating, air conditioning, ventilation) in smart home automation. These include ABB, Berker, Busch-Jaeger, Eaton, Elsner Elektronik, Eltako, EIBMARKT, Gira, Hager, Issendorf, Jung, Lingg & Janke, MDT, Merten, Siemens, Theben and Thermokon. Many of these manufacturers use different designations, such as KNX continuous controller, KNX object controller or KNX room temperature controller.

KNX room temperature controllers continuously record temperature values and forward them to other system components as KNX signals that can be evaluated. This process takes place continuously. A KNX continuous controller is therefore the same as a KNX room temperature controller. The situation is different with a KNX object controller. Object controllers are room temperature controllers without direct adjustment options on the device for the setpoint temperature. Object controllers were developed for object use. In public objects, as a rule, direct adjustment by strangers should be prevented. The values are parameterised directly via the ETS (software). You can change these directly via KNX (KNX buttons, KNX operating panels, KNX visualisations) in the setpoints. KNX object controllers are often cheaper and suitable in private areas for corridors, basements or storage rooms.

What do you have to consider when positioning a KNX room temperature controller?

As a rule, the installation is carried out using a branch switch box with 4 screw bosses, one switch box deep. Alternatively, use an electronics box if a separate bus coupler is required. With our convenient search function, you can quickly find the right items here in the eibabo® technology store.

 


TIP:

There are multi-channel KNX room temperature controllers for installation in your electrical distribution. Here, the temperature is measured via separate KNX sensors, for example from KNX buttons or KNX motion detectors with an integrated temperature sensor.


 

For optimal use of all functions and the best possible recording of the measurement data, please ensure that the installation height is 1.60 m from the top edge of the finished floor. In this way you ensure optimal control and user-friendly handling.

How is a room temperature controller connected to the KNX bus?

KNX room temperature controllers are equipped differently by the manufacturers. You can either buy the KNX room temperature controller including a bus coupler or you have to order the bus coupler separately. The required interface between the KNX bus and the KNX room temperature controller is called the bus coupler. You can tell whether your controller has a bus connection by the red and black bus terminal. The KNX controllers often offer included KNX binary inputs. These are used, for example, to integrate conventional buttons in the room to switch lights via KNX. These binary inputs usually correspond to the technical data of KNX push button interfaces and can therefore only be extended up to a maximum of 50cm.

How important is the appearance of a KNX room temperature controller?

There are controllers with or without a dial to adjust the temperature. Other models are operated via the display and menu controls. Everything is possible here. The controls should match your other switch range and reflect your modern, classic, simple or extravagant style of living.

 


TIP:

Don't just look at the exterior of a KNX room temperature controller, but also at its inner values. There are often considerable differences in the application developments (software) of the manufacturers.


 

The possibilities that the respective software can offer you may be relevant to your project requirements. Think of:

  • control behavior
  • Influencing control processes
  • Operating modes and external switching options or setpoint adjustment options
  • status feedback
  • number of group addresses
  • Behavior in the event of a bus voltage failure
  • and much more

 

What other properties should I consider before buying a KNX room temperature controller?

In addition to the technical, optical and software properties mentioned, other factors can speak for or against a specific model.

  • Do I need anti-theft or dismantling protection?
  • What color or what material do I want for the control panel?
  • Do the local conditions require wireless data transmission?
  • Should it be regulated via a room controller?
  • and some more

 

What are room controllers with integrated KNX room temperature controller?

An alternative to the KNX room temperature controllers presented here are the KNX room controllers, provided they have an integrated temperature controller. These are devices that you can use to centrally control lighting, temperature and blinds, for example. Such controllers can be used via individually assignable control panels for switching, dimming, regulating or controlling all required actuators and sensors. You can also get numerous high-quality KNX room controllers here in the shop at top conditions. Use our intelligent search for your research.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Installation bus systems > Room temperature controller for bus system you will find items from the following product groups:

Item overview:

  • Building system technology
  • Bus technology
  • Button interface
  • Clock thermostat
  • Continuous controller
  • Controllers
  • End strips
  • Energy efficient
  • Heating control
  • Heating technology
  • Home control
  • Humidity
  • Moellerfunk
  • Moisture meter
  • Multifunction display
  • Networking
  • Object controller
  • Radio system
  • Radio transmitter
  • Remote room sensor
  • Room controller
  • Room sensor
  • Room temperature controller
  • Room thermostat
  • Temperature
  • Temperature controller
  • Thermostat
  • Wireless temperature sensor


from the following manufacturers:

Manufacturer overview catalogue Room temperature controller:

  • ABB
  • Alre-it
  • Berker
  • Busch Jaeger
  • Eaton
  • Eberle
  • Elsner
  • Elso
  • Eltako
  • Gira
  • Hager
  • Jung
  • MDT
  • Merten
  • Siemens
  • Theben


 
When building a new house or renovating, you have numerous interesting options for organizing the control of the room temperature. We will tell you how you can use various bus systems such as KNX,... read more »
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Optimal use of the room temperature controller – this is how it is done.

When building a new house or renovating, you have numerous interesting options for organizing the control of the room temperature. We will tell you how you can use various bus systems such as KNX, radio or LCN in addition to the conventional temperature setting. Automation not only increases living comfort, but also contributes to the value of your building. This enables you to make necessary adjustments or changes even when you are not at home. This eibabo® catalog provides room temperature controllers for all common applications.

What are KNX room temperature controllers?

KNX room temperature controllers are part of a building's heating system. These are used for individual room temperature control of interior rooms and have various measuring ranges. The respective devices can differ significantly in terms of application and the functions provided for operation and comfort. For example, the differences are whether static heating surfaces or underfloor heating are to be controlled or whether air conditioning and ventilation functions are to be provided.

Do not confuse

Thermostats are also known as room temperature controllers. Installed on radiators, however, they measure the temperature at the heating and usually only differentiate between on and off.


KNX room temperature controllers, on the other hand, continuously control between 0 and 100 percent and use a heating actuator to communicate with the heating actuators.

How is the room temperature controlled using KNX?

A KNX room temperature controller determines the control difference between the target temperature and the actual temperature. The calculated control difference is sent as a 1-byte command value telegram (a value between 0 and 100 percent) via the KNX bus to the corresponding channel of a heating actuator. This processes the signal and then controls the actuator.

The following small example illustrates the rough functionality. The actual manufacturer specific control algorithm may be different:

The room temperature controller determines a current temperature of 18 degrees Celsius (controlled variable). However, the desired room temperature should be 22 degrees Celsius. The 22 degrees Celsius then represents the setpoint for the controlled variable. The resulting difference between the actual value and the setpoint is the control deviation. The control difference is 4 degrees Celsius and is used to determine the control variable that is to be used to influence the room temperature. Assuming the manipulated variable is 25%. This value is transmitted as a 1-byte telegram (0-255 = 0-100%) from the room temperature controller to the heating actuator. In this case 63.75. For example, the actuator takes 2 minutes to fully open. The time required for the respective actuator to open or close can be found in the data sheet for the thermoelectric actuator. This information must have been previously stored in the parameters of the actuator using Engineering Tool Software (ETS). With a command value specification of 25%, the actuator would switch on the actuator for 30 seconds (this corresponds to 25% of 2 minutes) and switch it off for 90 seconds. The actuator then switches on again for 30 seconds and so on. If the room temperature controller calculates and transmits a different command value specification, the switching cycle for the actuator also changes.

Source: eibabo®, Gira 210003 KNX continuous controllerImage: Gira 210003 KNX continuous controller

What is the difference between KNX continuous controllers, KNX object controllers and KNX room temperature controllers?

The selection of KNX temperature controllers is very large. eibabo® offers products from all leading manufacturers of control technology for HVAC (heating, air conditioning, ventilation) in smart home automation. These include ABB, Berker, Busch-Jaeger, Eaton, Elsner Elektronik, Eltako, EIBMARKT, Gira, Hager, Issendorf, Jung, Lingg & Janke, MDT, Merten, Siemens, Theben and Thermokon. Many of these manufacturers use different designations, such as KNX continuous controller, KNX object controller or KNX room temperature controller.

KNX room temperature controllers continuously record temperature values and forward them to other system components as KNX signals that can be evaluated. This process takes place continuously. A KNX continuous controller is therefore the same as a KNX room temperature controller. The situation is different with a KNX object controller. Object controllers are room temperature controllers without direct adjustment options on the device for the setpoint temperature. Object controllers were developed for object use. In public objects, as a rule, direct adjustment by strangers should be prevented. The values are parameterised directly via the ETS (software). You can change these directly via KNX (KNX buttons, KNX operating panels, KNX visualisations) in the setpoints. KNX object controllers are often cheaper and suitable in private areas for corridors, basements or storage rooms.

What do you have to consider when positioning a KNX room temperature controller?

As a rule, the installation is carried out using a branch switch box with 4 screw bosses, one switch box deep. Alternatively, use an electronics box if a separate bus coupler is required. With our convenient search function, you can quickly find the right items here in the eibabo® technology store.

 


TIP:

There are multi-channel KNX room temperature controllers for installation in your electrical distribution. Here, the temperature is measured via separate KNX sensors, for example from KNX buttons or KNX motion detectors with an integrated temperature sensor.


 

For optimal use of all functions and the best possible recording of the measurement data, please ensure that the installation height is 1.60 m from the top edge of the finished floor. In this way you ensure optimal control and user-friendly handling.

How is a room temperature controller connected to the KNX bus?

KNX room temperature controllers are equipped differently by the manufacturers. You can either buy the KNX room temperature controller including a bus coupler or you have to order the bus coupler separately. The required interface between the KNX bus and the KNX room temperature controller is called the bus coupler. You can tell whether your controller has a bus connection by the red and black bus terminal. The KNX controllers often offer included KNX binary inputs. These are used, for example, to integrate conventional buttons in the room to switch lights via KNX. These binary inputs usually correspond to the technical data of KNX push button interfaces and can therefore only be extended up to a maximum of 50cm.

How important is the appearance of a KNX room temperature controller?

There are controllers with or without a dial to adjust the temperature. Other models are operated via the display and menu controls. Everything is possible here. The controls should match your other switch range and reflect your modern, classic, simple or extravagant style of living.

 


TIP:

Don't just look at the exterior of a KNX room temperature controller, but also at its inner values. There are often considerable differences in the application developments (software) of the manufacturers.


 

The possibilities that the respective software can offer you may be relevant to your project requirements. Think of:

  • control behavior
  • Influencing control processes
  • Operating modes and external switching options or setpoint adjustment options
  • status feedback
  • number of group addresses
  • Behavior in the event of a bus voltage failure
  • and much more

 

What other properties should I consider before buying a KNX room temperature controller?

In addition to the technical, optical and software properties mentioned, other factors can speak for or against a specific model.

  • Do I need anti-theft or dismantling protection?
  • What color or what material do I want for the control panel?
  • Do the local conditions require wireless data transmission?
  • Should it be regulated via a room controller?
  • and some more

 

What are room controllers with integrated KNX room temperature controller?

An alternative to the KNX room temperature controllers presented here are the KNX room controllers, provided they have an integrated temperature controller. These are devices that you can use to centrally control lighting, temperature and blinds, for example. Such controllers can be used via individually assignable control panels for switching, dimming, regulating or controlling all required actuators and sensors. You can also get numerous high-quality KNX room controllers here in the shop at top conditions. Use our intelligent search for your research.

 

eibabo - technology store

 

Catalogue content:


In this eibabo® catalogue Installation bus systems > Room temperature controller for bus system you will find items from the following product groups:

Item overview:

  • Building system technology
  • Bus technology
  • Button interface
  • Clock thermostat
  • Continuous controller
  • Controllers
  • End strips
  • Energy efficient
  • Heating control
  • Heating technology
  • Home control
  • Humidity
  • Moellerfunk
  • Moisture meter
  • Multifunction display
  • Networking
  • Object controller
  • Radio system
  • Radio transmitter
  • Remote room sensor
  • Room controller
  • Room sensor
  • Room temperature controller
  • Room thermostat
  • Temperature
  • Temperature controller
  • Thermostat
  • Wireless temperature sensor


from the following manufacturers:

Manufacturer overview catalogue Room temperature controller:

  • ABB
  • Alre-it
  • Berker
  • Busch Jaeger
  • Eaton
  • Eberle
  • Elsner
  • Elso
  • Eltako
  • Gira
  • Hager
  • Jung
  • MDT
  • Merten
  • Siemens
  • Theben
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