.webp "Potentiometer")
.webp "Potentiometer for EC fan")
.webp "Potentiometer for damper actuators")
.webp "HVAC potentiometer")
.webp "Potentiometer Modbus communication")
EU declaration conformity
Digital potentiometer | anthracite enclosure
Product description
The RDCV fan speed controller is a digital potentiometer for residential ventilation applications, designed for precise and flexible control. It features a modern design with an intuitive three-button interface and a LED display.
The controller is suitable for operating EC fans, AC fan speed controllers, frequency inverters, and damper actuators.
Fan speed is manually adjusted via a simple three-button interface and the output can be continuously variable or divided in 2 to 10 equal steps, with adjustable minimum and maximum values.
The controller supports Modbus RTU communication and operates on a supply voltage of 110 to 230 VAC.
The modern anthracite enclosure supports both surface and flush mounting.
RDCV offers a versatile solution for modern ventilation systems that require accurate control and flexible installation options.
Additional specifications and description
How does the controller operate?
The RDCV is designed for EC fan speed regulation. The controller generates an analogue output signal to communicate the requested fan speed. By default, this output is 0–10 V, but it can be changed to 0–20 mA or 0–100% PWM via Modbus RTU.
The output value can be manually adjusted using the up and down arrow buttons. The selected output level is displayed on the 7-segment LED, either as a percentage or a step number, depending on the configuration. The output signal can be set to operate continuously or in 2 to 10 discrete steps.
Pressing the select button with the green check mark for four seconds activates or deactivates the potentiometer.
How does the controller use Modbus RTU communication?
The RDCV controller features Modbus RTU communication, allowing full control and configuration via the free 3SModbus software. All functions available through the controller’s keyboard interface are duplicated in the Modbus RTU holding registers, giving complete access to its features from a computer.
How and where can the controller be mounted?
The enclosure supports both surface and flush mounting. When flush-mounted in a wall, the controller offers IP44 protection against dust and dirt ingress. For surface mounting, the protection level is IP54.
The RDCV can be installed on solid walls, gypsum board, or wooden panels. For flush mounting, the mounting holes are compatible with standard European wall boxes. Installation only requires basic tools such as screwdrivers and pliers, along with some general knowledge and handiness.
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