Our heat pump controllers are intelligent devices designed for modern heating and cooling systems. With the ability to independently manage central heating circuits, underfloor heating, and cooling functions, they provide complete control over the thermal comfort of any building.
The high-quality design ensures long-term reliability, while advanced technological solutions enable precise heat management and full automation of the heating process – both locally and remotely.
The ST-521 control module is designed to provide full support for modern heat pump systems. With an extensive set of inputs and outputs, the device enables precise management of all key components of the installation – from heaters and mixing valves, through circulation pumps, to inverter communication and remote monitoring.
Support for multiple temperature sensors allows accurate monitoring of operating parameters, while dual-channel control of room thermostats enables independent management of two heating zones. Integration with RS-485 communication and an Ethernet module provides complete configuration flexibility and the possibility of remote control.
The ST-521 module is the heart of the system – ready to operate in even the most demanding heating and cooling installations.
The control module is equipped with a set of LED indicators that simplify real-time assessment of the system status and speed up diagnostics:
Power – signals proper connection and the presence of voltage in the device
Communication – indicates an active connection and data transmission between modules
Update – shows that a software or configuration update is in progress
Thanks to these indicators, both users and service technicians can quickly and easily identify the device status without the need for additional tools.
The control module has been designed for quick and convenient mounting on a standard 35mm DIN rail. The enclosure features clips that allow secure placement of the device without the need for additional tools. Thanks to its compact design and easy access to connectors, installation is straightforward even in confined switchboard spaces. Mounting on a DIN rail ensures not only an organized control cabinet but also easy removal and replacement of the module if necessary.
The control module has been designed for convenient installation in standard electrical cabinets. Thanks to its thoughtful construction and proportions, the device fits perfectly on a DIN rail, providing not only functionality but also an aesthetically organized layout of the installation components.
The control module is supplied together with a control panel that provides intuitive system management. Depending on installation preferences, the user can choose one of two versions:
Surface-mounted panel – ideal for quick installation without altering the wall structure
Flush-mounted panel – a discreet and elegant solution installed in an electrical mounting box
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Sensor Inputs: |
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| PWM Outputs and Inputs (Flow Control): |
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| 230V Outputs: |
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PRODUCT PARAMETERS
| Specification | Unit | Value |
|---|---|---|
| Supply voltage | V / Hz | 230 ±10% / 50 |
| Controller power consumption | W | 10 |
| Ambient temperature | °C | 5–50 |
| Max. heater output load | A | 2 |
| Max. pump output load | A | 0.5 |
| Max. valve output load | A | 0.5 |
| Temperature range (KTY sensors) | °C | -30 ÷ 99 |
| Temperature range (PT-1000 sensors) | °C | -30 ÷ 180 |
| Fuse rating | A | 6.3 |
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