AC motor 5 A | duct temperature or humidity control | 5 steps

This transformer fan speed controller with Modbus RTU communication is designed for controlling single-phase motors up to 5 A with a supply voltage of 115 - 230 VAC. It allows for both manual and automatic speed regulation based on demand. The controller uses autotransformer technology to gradually vary motor voltage, ensuring a perfectly sinusoidal output for quiet operation. A special impregnated coating on the autotransformer reduces electrical noise. Control can be managed via various options, including Sentera HVAC sensors, potentiometers, Modbus I/O modules, or BMS systems. The unit has an IP54-rated enclosure for surface mounting, protecting it from dust and moisture.

The DSTHM-2 is a combined sensor designed for accurate measurement of temperature and relative humidity within air ducts. It measures temperature from -30 to 70 °C and relative humidity from 0 to 100% rH (non-condensing), and can also calculate the dew point. Both temperature and humidity ranges are selectable. The sensor operates with Power over Modbus (PoM), with all parameters and measurements accessible via Modbus RTU (RS485). The bootloader feature allows for convenient firmware updates through Modbus RTU communication. The DSTHM-2 has an IP54 protection rating for its enclosure and an IP20 rating for its probe, making it a reliable and easily integrable solution for in-duct temperature and humidity control applications.