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  • New item   -103.01€Three-phase electronic fan speed controller | Modbus RTU | TK | 3A | 400VAC | Sentera Controls | TVSS5-30CDT
    New item   -103.01€Three-phase electronic fan speed controller | Modbus RTU | TK | 3A | 400VAC | Sentera Controls | TVSS5-30CDT 1
    New item   -103.01€Three-phase electronic fan speed controller | Modbus RTU | TK | 3A | 400VAC | Sentera Controls | TVSS5-30CDT 2
    New item   -103.01€Three-phase electronic fan speed controller | Modbus RTU | TK | 3A | 400VAC | Sentera Controls | TVSS5-30CDT 3
    New item   -103.01€Three-phase electronic fan speed controller | Modbus RTU | TK | 3A | 400VAC | Sentera Controls | TVSS5-30CDT 4

    Three-phase electronic fan speed controller | Modbus RTU | TK | 3A | 400VAC | Sentera Controls | TVSS5-30CDT

    Code: TVSS5-30CDT
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  • Product description

    Three-phase electronic fan speed controller | Modbus RTU | TK | 3A | 400VAC | Sentera Controls | TVSS5-30CDT

    TVSS5-30CDT – Sentera Controls three-phase electronic fan speed controller for 3×400 VAC motors up to 3 A. Controlled by a 0-10 VDC / 0-20 mA signal or Modbus RTU, it has a TK input and phase loss monitoring and is mounted on a DIN rail.

    Key idea:
    Smooth three-phase speed control without a frequency inverter: a simpler and more affordable solution for voltage-controllable three-phase fans when automation and BMS integration are required.
    What it is for TVSS5-30CDT:
    This model is designed for medium-power fans (up to 3 A) – duct fans in offices, classrooms, retail premises or 2–3 smaller fans together.
    Max. motor current
    3 A
    Control
    0-10 VDC / 0-20 mA / Modbus RTU
    Power supply
    3×400 VAC ±10 %, 50 Hz
    Installation
    DIN rail, IP20

    Operating principle

    The controller is mounted on a DIN rail in a control panel. Connect the three-phase power supply (R, S, T, N, PE), the motor (U, V, W), the control signal, the motor thermal contacts (TK) and, if required, the Modbus RTU line.

    The output voltage is varied within 80–415 VAC between Vmin (80–250 VAC) and Vmax (260–415 VAC), which are set with trimmers or via Modbus. A 0-10 VDC, 10-0 VDC or 0-20 mA signal and the switch-off level (0.1–6 VDC) are selectable.

    The red LED signals phase loss or motor overheating, the green LED signals operation; the fan can be switched on / off with an external contact (SW) or via Modbus.

    Engineer's note: with an AC induction motor, reducing the voltage increases rotor losses, so the savings are lower than with an EC fan or a frequency inverter; when completely silent operation at low speed is essential, choose a transformer controller with a sinusoidal output voltage.

    Benefits TVSS5-30CDT?
    Smooth three-phase control, analogue and Modbus inputs, TK protection and phase monitoring – in one DIN module.

    Technical specifications

    Product type Three-phase electronic fan speed controller with TK
    Manufacturer / code Sentera Controls / TVSS5-30CDT
    Supply voltage 3×400 VAC ±10 %, 50 Hz
    Max. motor current 3 A
    Regulated output (U, V, W) 80–415 VAC
    Vmin / Vmax 80–250 VAC / 260–415 VAC (trimmers or Modbus)
    Analogue input 0-10 VDC, 10-0 VDC or 0-20 mA
    Switch-off level 0 or 0.1–6 VDC
    Remote switch-on SW contact or Modbus
    TK input For motor thermal contacts
    Auxiliary outputs +12 VDC / 100 mA; +12 VDC / 1 mA for potentiometer
    Start-up Fast or slow
    Communication Modbus RTU (RS485), 3SModbus software
    Indication Red LED – phase loss / overheating; green – operation
    Protection class IP20 with protective cover
    Operating environment 0…+40 °C, 0–80 % rH non-condensing
    Installation DIN rail, indoor use only
    Cables Up to 2.5 mm²
    Weight 0.97 kg (net)
    Compliance LVD 2014/35/EU, EMC 2014/30/EU, RoHS 2011/65/EU, WEEE 2012/19/EU

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

    Original manufacturer documentation – technical data, wiring diagrams and installation instructions.

    Main functions

    • Smooth three-phase control – for voltage-controllable 3×400 V fans.
    • 0-10 VDC / 0-20 mA – directly from a sensor or controller.
    • Modbus RTU – control and monitoring from the BMS.
    • TK protection and phase monitoring – overheating or phase loss is indicated by a red LED.
    • Switch-off level – at a low signal the motor stops.
    • Remote switch-on – With the SW contact or via Modbus.
    • SenteraWeb – via the Sentera internet module, the controller can be connected to the SenteraWeb cloud – remote control, monitoring and alerts via the internet.

    Where is it used?

    • Industrial ventilation with three-phase fans
    • Warehouses, production halls
    • Three-phase roof and duct fans
    • Buildings with BMS

    On-demand operation

    For the automation engineer.
    Analogue and Modbus control, TK and phase monitoring.
    For the panel builder.
    DIN module with protective cover.
    For the building owner.
    A more affordable alternative to a frequency inverter for voltage-controllable fans.

    Application guide: how it is used in practice

    Typical TVSS5-30CDT applications:

    Site What is connected Result Installer's note
    Warehouse extraction Temperature sensor 0-10 VDC → analogue input Ventilation increases as the temperature rises Set Vmin so that the motor starts
    Building with BMS Modbus RTU → A, /B Speed and status are controlled centrally Separate Modbus addresses
    Motor with thermal contacts TK → TK terminals Overheating is indicated by a red LED TK connection is recommended
    Manual control 10 kΩ potentiometer → VCC (+12 V / 1 mA) Speed is set manually Route the signal cable separately

    How to select the controller current

    Rated current of the motor(s) Recommended model
    up to 3 A TVSS5-30CDT (3 A) ← this model
    3–6 A TVSS5-60CDT (6 A)
    Rule: controller max. current ≥ motor rated current (see the motor nameplate). The starting current is already accounted for by the manufacturer; no additional margin is needed. When connecting several fans – motors of the same type – add up their rated currents.
    When to choose another solution: the motor is not voltage-controllable or high efficiency is required – a frequency inverter; for simple stepped control – a three-phase transformer controller (STR-4 / STRS4 series); for a single-phase motor – EVS-1 / MVS-1 series.

    Pros

    • Smooth three-phase control
    • 0-10 VDC / 0-20 mA and Modbus RTU
    • TK and phase monitoring
    • DIN module with protective cover
    • Adjustable limits and switch-off level

    Cons / limitations

    • Current up to 3 A
    • Only for voltage-controllable three-phase motors
    • IP20 – in control panel only
    • Lower efficiency than with a frequency inverter

    Safety and installation notes

    • Installation and connection must be carried out by a qualified electrician with the power disconnected.
    • Check that the three-phase motor is suitable for voltage control (manufacturer's confirmation).
    • Always connect PE and N.
    • In a Modbus network with AC power supply, do not connect the GND terminal to other devices or to the CNVT-USB-RS485 converter – this may damage the communication electronics.

    Quick selection guide

    3 A
    3×400 VAC
    0-10 VDC / Modbus
    TK
    DIN rail
    Suitable when you need:
    • smooth three-phase fan speed control;
    • sensor or BMS control;
    • TK and phase monitoring.
    Check before use:
    • whether the motor is suitable for voltage control;
    • the motor current;
    • the control signal type.
    Important reminder: TVSS5-30CDT does not replace a frequency inverter for motors that are not suitable for voltage control.

    FAQ

    Is it suitable for any three-phase motor?
    No, only for voltage-controllable fan motors.
    Can it be controlled by a 0-10 V signal?
    Yes, as well as 10-0 VDC and 0-20 mA.
    What indicates phase loss?
    Red LED (L1).
    Does it have Modbus?
    Yes, Modbus RTU (RS485).

    Three-phase electronic fan speed controller | Modbus RTU | TK | 3A | 400VAC | Sentera Controls | TVSS5-30CDT

    Sentera TVSS5-30CDT – three-phase electronic fan speed controller 3×400 VAC, up to 3 A, control 0-10 VDC / 0-20 mA / Modbus RTU, TK and phase monitoring, DIN rail.

    Illustrative image may have been created using AI. The appearance of the product may differ slightly from the image shown. Please refer to the technical specification.

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