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AC motor 2,5 A | Temperature humidity control | 5 steps

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Article code FS-D-000013
Current stock 4 U.
Factory lead time 4 Week(s)
Next arrival 10/10/2025 - 1 U.

Solution description

Temperature humidity control for AC fans with single-phase motor. The maximum motor current is 2,5 A. The fan speed is controlled in function of relative humidity. The RTVS8 transformer fan speed controller regulates the motor speed in steps. Fan speed can be regulated from high to low or from low to high. The HVAC transmitter receives 24 VDC supply voltage via the RTVS8 controller. All settings can be adjusted via Modbus RTU. With this solution, it is also possible to control fan speed in function of temperature. If the motor is equipped with thermal contacts (TK), RTVS8 can detect motor overheating in an early stage and disable the motor to prevent damage.

Components of this solution

Article code
Quantity
Description

RTVS8-25L22

1 U.

Transformer fan speed controller with Modbus RTU communication. Designed for manual or demand-based fan speed regulation. Supply voltage of 115 - 230 VAC. Controls single-phase motors with a maximum combined motor current of 2.5 A. Fan speed regulated by gradually varying motor voltage using autotransformer technology, ensuring perfectly sinusoidal motor voltage for quiet operation. Special impregnated coating reduces electrical noise from the autotransformer. Control options: potentiometer (SPV series), Modbus I/O module, BMS system, or based on environmental parameters like temperature, relative humidity, CO2, and air quality (TVOC). Surface mountable with IP54 protection.

FCTHF

1 U.

This smart room sensor provides comprehensive HVAC control by measuring ambient light, relative humidity, and temperature. It measures temperature (0-50 °C) and relative humidity (0-95% rH). It controls devices like fans or dampers with a single analog output based on the measured values. It includes adjustable temperature/humidity ranges and an ambient light sensor. It provides humidity and temperature-dependent fan speed control. It's suitable for flush-mounted/surface-mounted installation and connects easily with spring-contact terminal blocks. It operates on 24 V DC. All data is accessible via Modbus RTU, and the firmware can be updated. It features LED status indicators with adjustable light intensity. It offers long-term stability and accuracy. It is used in sensitive areas such as data centers and museums.

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