Application
The electronic radiator valve SAB+ eliminates the need for battery changes and cable harnesses. It generates its own electrical energy for operation through thermal energy harvesting, making it maintenance-free. This saves heating costs and simplifies installation. The miniature actuator utilizes the temperature difference between a warm radiator and a cooler room to produce electricity via a thermoelectric generator, storing it in a buffer for continuous power. This product is designed for automation solutions in functional buildings, transmitting sensor data wirelessly over short distances without encryption. It does not communicate directly with the Internet, and any data forwarded via the Internet must be encrypted according to legal requirements. No personal or location data is transmitted.
Types Available
- Battery-free valve actuator EnOcean with thermal energy harvesting: SAB+ EEP A5-20-01
Security Advice – Caution
⚠️ The installation and assembly of electrical equipment should only be performed by authorized personnel.
The product must only be used for its intended application. Unauthorized modifications are prohibited. The product must not be used in conjunction with any equipment that could, directly or indirectly, threaten human health or life, or endanger people, animals, or assets in case of failure. Ensure all power is disconnected before installation. Do not connect to live or operating equipment.
Please comply with:
- Local laws, health & safety regulations, technical standards, and regulations.
- The condition of the device at the time of installation to ensure safe installation.
- This data sheet and installation manual.
Technical Data
| Radio Technology | EnOcean (IEC 14543-3-10), transmission power <10 mW |
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| Frequency | 868 MHz |
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| Antenna | Internal transmitting/receiving antenna |
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| Data Transmission | Bidirectional, airConfig ready |
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| Power Supply | Maintenance-free thermal energy harvesting, micro-USB port (type B) |
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| Measuring Range Temp. | 0..+40 °C |
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| Measuring Interval | Every 2..20 min., configurable via airConfig (in 1 min. steps) |
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| Transmission Interval | = Measuring interval |
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| Functions | Radio interface, heating actuator operation, emergency self-control mode, automatic closing point control, frost protection function |
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| Display | Status-LED, red |
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| Enclosure | PC, pure white, aluminium |
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| Protection | IP40 according to EN 60529 |
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| Ambient Condition | 0..+50 °C, max. 85% rH non-condensing |
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| Mounting | Screw mounted, M30 x 1,5 |
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| Notes | Configuration software "airConfig" can be downloaded from Thermokon website. EnOcean USB stick (e.g., contained in the test tool airScan, item No. 566704) is required for communication. Integrated temperature sensor, Operational noise <35 dB(A), nominal stroke 3.8 mm, max. speed 0.24 mm/s, Min. force 100 N. |
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Energy Harvesting - Energieversorgung
The SAB+ valve actuator is powered by the temperature difference between the mounting flange and the metal housing. A low electrical voltage is generated from a temperature difference of >5K, which is stored in the internal lithium storage. For permanent operation, the energy balance (harvesting - consumption) must be positive.
When installing the valve, ensure:
- The temperature difference is sufficient (e.g., no heat accumulation due to cladding).
- The transmission interval of the SAB+ is configured as long as possible.
- The response time of the counterpart (Gateway, Message Server, etc.) is as short as possible. Thermokon devices typically respond within 50 ms.
Energy consumption is proportional to the response time and inversely proportional to the wake-up interval. Outside of the heating period, the "summer bit" should be sent to the SAB+ by the gateway/controller, which extends the wake-up interval to 8 hours.
ℹ️ It is not possible to charge the device via powerbank!
Information about EasySens® (Radio) / airConfig General Usage
[PDF] EasySens® - airConfig: Basic information about EasySens® radio and general usage of the airConfig software can be downloaded from the Thermokon website.
Overview of the Radio Telegrams
[PDF] EEP: The structure of the data contained in the telegram can be found in the EEP (EnOcean Equipment Profile) list provided by the EnOcean Alliance.
Mounting Advices and Commissioning
The SAB+ must be mounted before pairing (e.g., with a Message Server / Gateway).
- Clean the standard valve thread (M30x1.5) and mount a metal adapter if necessary.
- Mount the SAB+ in its delivery state (valve push rod fully retracted) on the valve. (If required, press the button for 3 to 6 seconds with a thin pin to retract the valve push rod).
It is not possible to mount the SAB+ with an extended valve push rod!
Diagram Description: The device features a "Learn button" and a red LED indicator.
- Note the mounting position. (Type of protection IP40)
ℹ️ Do not orientate downwards; refer to the illustration.
Diagram Description: An illustration shows the correct mounting orientation, indicating that the device should not be mounted upside down.
- Start teach-in process.
Teach-In Process
The teach-in process of the SAB+ to the gateway (MSG server) is similar to the battery-powered model SAB05.
- Mount the SAB+ on the heating valve.
- Set the gateway (MSG-Server) into teach-in mode (refer to the radio receiver manual).
- Press the SAB+ learn button.
- LED flashes 1x: SAB+ is connected to the gateway.
- LED flashes 3x: The teach-in process needs to be repeated (if necessary, shorten the radio range).
- The SAB+ performs an initial drive to identify the mechanical limits (1x 100% fully opened / 1x 0% closed) to determine the closing position.
If there is no automatic initialization, it must be triggered manually.
- The actuating value of a MSG-server (or gateway) can be set.
It may be necessary to manually trigger a learning telegram from the gateway to teach in the valve actuator. Please refer to the gateway's instructions.
Function Description
The SAB+ communicates according to EEP A5-20-01 and the set measuring/transmission interval. After sending data, it awaits new transmissions from the gateway.
Communication Cycle Interval: Factory default is 10 minutes, individually configurable via airConfig from 2 to 20 minutes in 1-minute steps.
Valve Safe Position: If operation is not possible due to insufficient power, the SAB+ moves to a valve safety position (factory default: 50%, configurable via airConfig).
Frost Prevention Function: If the room temperature falls below 8°C, the valve actuator opens the heating valve until the ambient room temperature reaches 10°C (Hysteresis 2 K).
Communication Loss (Emergency Self-Regulation Mode): If no valid telegram is received for 9 consecutive intervals, the valve actuator enters emergency self-regulation mode and extends the transmission interval to 1 hour. In this mode, it uses the internal temperature sensor and the configured setpoint ("set point on communication loss"). Note the influence of the internal temperature sensor on the heating flow temperature.
Position Referencing: After every 30 movements (changes in valve position), the actuator references its position. The valve is fully opened and then immediately closed to check and correct the end positions (100% and 0%). This occurs regardless of whether the SAB+ is controlled by setpoint temperature, room temperature, or setpoint position, and also when the "summer bit" is set.
Charging Function: The SAB+ includes its energy status in every telegram to indicate impending failure. A micro-USB (type B) port on the valve side can be used for charging (full charge approx. 3.5 hours) using a USB power supply.
Diagram Description: A diagram indicates the location of the Micro-USB port.
ℹ️ It is not possible to charge the device with a powerbank!
Configuration via airConfig
Configuration of the SAB+ requires airConfig Version 5.03.03.
After pressing the learn button, the SAB+ appears in the sensor tab, and its parameters are read out.
Key Configuration Parameters:
- Valve Safe Position: Fixed, pre-set position when internal power supply is lost.
- Set Point on Communication Loss: Set point used when communication is lost for self-controlled mode.
- Ki (Integration Coefficient): Affects steady-state error correction. Typical value = 100.
- Kp (Amplification Factor): Affects response speed to setpoint changes. Defines control system 'stiffness'. Typical value = 10.
- Kd: Damps system response to prevent overshoot. Typical value = 0.
- Temperature Offset: Compensates for higher measured temperatures when the actuator is mounted directly on the radiator. The set value is subtracted from the internal sensed value.
- RF Interval: Sets the transmission/reception interval from 2 to 20 minutes. Frequent transmission increases energy consumption, potentially leading to the valve moving to safe position if harvested energy is insufficient.
Factory Reset: Resets the device to factory settings.
Dimensions (mm)
Diagram Description: Technical drawings show the physical dimensions of the SAB+ actuator.
- Diameter: Ø62 mm
- Height: 85 mm
- Depth: 60 mm
- Thread: M30 x 1.5
Accessories (Optional)
- EnOcean USB transceiver for airConfig/airScan (incl. license) - Item No. 566704
Notes on Disposal
[Disposal Symbol] The crossed-out wheelie bin symbol indicates that the product or removable batteries must not be disposed of with household or commercial waste. Within the EU, you are legally obliged to dispose of the product separately and appropriately in accordance with national laws. Alternatively, please contact your supplier or Thermokon Sensortechnik GmbH. Further information can be found at: www.thermokon.de
