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.
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.
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 faillure
In case of a power failure, this controller will automatically reset itself. When the power is restored, the motor will restart automatically.
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.