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Light grey plastic enclosure, blue front label, three cable glands
Light grey plastic enclosure, blue front label, three cable glands
Light grey plastic enclosure, blue front label, three cable glands
Light grey plastic enclosure, blue front label, three cable glands
Light grey plastic enclosure
Light grey plastic enclosure, three cable glands
Electrical wiring in light grey plastic enclosure

Fan speed controller | Modbus RTU controlled | 1,5 A

Product description

This transformer fan speed controller regulates fan speed manually or demand based. It controls single-phase motors. The (combined) maximum motor current is 1,5 A. RTVS1 is controlled via Modbus communication. A Sentera HVAC sensor, potentiometer (SPV series) or a BMS system can be used to adjust the requested fan speed. Fan speed is regulated by varying the motor voltage in steps. The autotransformer technology generates a motor voltage with a perfect sinusoidal shape. This guarantees quiet motor operation. A special impregnated coating reduces the electrical noise from the autotransformers. The enclosure allows surface mounting (IP54 protection). Fan speed can be controlled manually or based on temperature, relative humidity, CO2, air quality (TVOC) or CO. The supply voltage is 230 VAC.

Article code RTVS1-15L22
GTIN 0.540.100.301.744.9
Category Modbus RTU motor control
Current stock 10 U.
Factory lead time 4 Week(s)

Additional specifications and description

How does it work?
This fan speed controller requires a Modbus RTU control signal. In manual mode, this can be done via a BMS system or a Modbus RTU master. The requested fan speed is written in Modbus register 12. In automatic mode, a Sentera HVAC sensor or SPV-series potentiometer is connected to the RTVS1 controller. The connected device can be specified via Modbus register 18. Fan speed is controlled via the connected device. So in automatic mode, fan speed can be controlled based on temperature, relative humidity, CO2, air quality (TVOC), CO or the SPV-series potentiometer. In combination with DADCM, RTVS1 series can be controlled via a 0-10 Volt analogue input signal.
Increase or decrease fan speed when temperature rises?
In automatic mode, fan speed can increase or decrease. Both operating modes are called forward and reverse mode. One of both operating modes can be selected. Forward mode means that the fan speed will increase when the measured value increases. In reverse mode, fan speed will be reduced when the measured value increases.
Unregulated output
The functionality of the extra, unregulated output (230 VAC) can be selected via Modbus register 19. By default, it indicates alarms. It can also indicate motor operation or it can be controlled via Modbus register 15.
Thermal motor protection
This fan speed controller can monitor thermal motor contacts (TK or thermal contacts measure temperature in the motor windings). In case of motor overheating, the TK monitoring function will disable the motor to prevent motor damage. If the motor is not equipped with TK contacts, disable the TK monitoring function via Modbus register 14.
Auto restart after power failure
In case of a power failure, this controller will automatically reset itself. When the power is restored, the motor will restart automatically.
Solid enclosure
The enclosure is made of high-quality r-ABS plastic. This material is exceptionally heat resistant, very tough and offers good protection against impacts. The enclosure can be surface mounted and offers an IP54 protection against ingress of dirt, dust and moisture.
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