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Light grey plastic enclosure, blue front label
Light grey plastic enclosure, blue front label
Light grey plastic enclosure, blue front label
Light grey plastic enclosure, blue front label
Light grey plastic enclosure, three cable glands
Light grey plastic enclosure

Fan speed controller | Modbus RTU | 115 - 230 VAC | 5 A

Product description

Transformer fan speed controller with Modbus RTU communication to regulate fan speed manually or demand based. The supply voltage is in the range of 115 - 230 VAC. It controls single-phase motors. The (combined) maximum motor current is 5 A. RTVS8 series are controlled via Modbus communication. A Sentera HVAC sensor, potentiometer (SPV series), Modbus I/O module 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.

Article code RTVS8-50L22
GTIN 0.540.100.301.835.4
Category Single-phase motor controls 115 - 230 VAC
Current stock 1 U.
Next arrival 05/08/2022 - 3 U.
Factory lead time 4 Week(s)

Additional specifications and description

Modbus RTU communication
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 slave device. The requested fan speed is written in Modbus register 12. In automatic mode, a Sentera HVAC sensor, a DADCM 0-10 V module or SPV-series digital potentiometer is connected to the RTVS8 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 via a 0-10 V signal, based on temperature, relative humidity, CO2, air quality (TVOC), CO or the SPV-series potentiometer.

Forward or reverse?
In automatic mode, forward or reverse mode 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 (115 - 230 VAC - depends on the supplied voltage) 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 faillure
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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