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EU declaration conformity
Automatic AC fan speed controller | dual motor output 3 A
Product description
The TCMF8-302DM is a device designed for AC fan speed control in systems with single-phase motors. Two motors with a maximum motor current of 3 A each can be connected to the controller. It regulates automatically fan speed based on real-time measurements from up to 4 connected HVAC sensors through the RJ45 socket, supporting Power over Modbus. Extra sensors can be connected via additional power supplies.
The 2 analogue inputs and 2 analogue outputs provide the tools for customisation based on your specific needs. Downloading application-specific firmware is possible through SenteraWeb - the HVAC cloud platform of Sentera. While the TCMF8-302DM does not include an integrated internet gateway, its compatibility with an optional Sentera gateway ensures easy connection to SenteraWeb. Choose between standalone operation and continuous connectivity to the cloud platform after downloading the suitable firmware.
Additional specifications and description
Application specific firmware
TCMF8 controllers require application specific firmware. Typically, they regulate fan speed based on the input of the connected sensors or potentiometers. Application specific firmware can be downloaded via SenteraWeb - your personal HVAC cloud platform. This controller does not have an integrated internet gateway. An external internet gateway is required to connect to SenteraWeb and to download application specific firmware. Once the firmware is downloaded, the TCMF8 controller can work stand alone or it can stay connected to SenteraWeb.
Control AC fans
An AC fan is a fan powered by alternating current. It plays a crucial role in facilitating the circulation of air within heating, ventilation and air conditioning systems. AC fans are commonly used in various cooling applications to dissipate heat generated by electronic components or to enhance air circulation in buildings. The TCMF8 is intended for control of AC fans and offers specific solutions depending on the customer’s needs.
Different functionalities
We offer a limited number of specific firmware versions for typical HVAC applications (e.g. destratification, demand based fan speed control, etc). First select the required functionality via our website's solution page, then download the application specific firmware. If necessary, it is possible to adjust some settings via the Modbus Holding registers. No programming is required!
Two outputs to regulate fan speed
This controller has two outputs to control AC fans with single-phase motor. The maximum combined current is 3 A per output. Fan speed is regulated by reducing motor voltage via phase angle control / TRIAC technology. This means that this speed controller is only suitable for voltage controllable motors. If you are not sure whether your motor is voltage controllable, it is best to contact the motor manufacturer. This speed controller works completely silently. Thanks to the accurate motor control, humming motor noise at low speed remains limited.
Thermal motor protection
When an AC motor fails, it is often due to overheating. In order to detect motor overheating in time, some motors are equipped with TK or thermal contacts. These thermal contacts measure temperature in the motor windings. TCMF8 fan speed controllers can monitor two thermal motor contacts. In case of motor overheating, the TK monitoring function will disable the motor to prevent permanent motor damage. The motor TK can be connected to the TK and 24 VDC terminals.
Connect sensors or potentiometers
External HVAC sensors or potentiometers can be connected via Modbus RTU communication or via the analogue inputs. To simplify wiring of the external devices, 24 Volt supply is available via the RJ45 socket. The 24 Volt supply and Modbus communication can be distributed via one cable - we call it Power over Modbus or PoM. All settings can be adjusted via the Modbus Holding registers.
IP54 enclosure for wall mounting
This fan speed controller can be installed on a wall or panel indoors. Make sure that the fan speed controller can cool sufficiently. Preferably install it in a cool place, best not in direct sunlight. The enclosure is made of high-quality r-ABS VO (UL94) plastic. This material is flame extinguishing, very tough and offers good protection against impacts. It offers an IP54 protection against ingress dust and water.
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