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  • New item   -60.37€Modular electronic fan speed controller | Modbus RTU | TK | 3A | 230VAC | DIN rail | Sentera Controls | MVSS1-30CDM
    New item   -60.37€Modular electronic fan speed controller | Modbus RTU | TK | 3A | 230VAC | DIN rail | Sentera Controls | MVSS1-30CDM 1
    New item   -60.37€Modular electronic fan speed controller | Modbus RTU | TK | 3A | 230VAC | DIN rail | Sentera Controls | MVSS1-30CDM 2

    Modular electronic fan speed controller | Modbus RTU | TK | 3A | 230VAC | DIN rail | Sentera Controls | MVSS1-30CDM

    Code: MVSS1-30CDM
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  • Product description

    Modular electronic fan speed controller | Modbus RTU | TK | 3A | 230VAC | DIN rail | Sentera Controls | MVSS1-30CDM

    MVSS1-30CDM – Sentera Controls modular electronic speed controller with motor thermal protection (TK) terminals and an alarm output, mounted on a DIN rail in a control panel. Designed for single-phase voltage-controllable AC fan motors up to 3 A: speed is changed by varying the motor supply voltage within 30–100 % Us, with the command coming from an analogue 0-10 VDC / 0-20 mA signal or via Modbus RTU.

    Key idea:
    This is a controller for an automation control panel: it sits next to the other automation on the DIN rail, and its speed is dictated by a sensor, controller, BMS or external potentiometer. All wiring and settings are in one place – no need to climb up to the fan for maintenance.
    What it is for MVSS1-30CDM:
    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
    230 VAC ±10 %, 50–60 Hz
    Installation
    DIN rail, IP20 (in control panel)

    Operating principle

    The controller is mounted on a standard DIN rail in an electrical or automation control panel. Connect the 230 VAC power supply, the motor (U1, U2), the control signal to the Ai input and, if required, the Modbus RTU line (A, /B), and the motor thermal contacts to the TK terminals.

    Electronic (semiconductor) control: the effective (RMS) value of the motor supply voltage is varied, so the output voltage is not purely sinusoidal. Us – supply voltage (230 VAC).

    On receiving a 0-10 VDC or 0-20 mA signal (direction and type are selected with DIP switches), the controller varies the output voltage between the minimum (30–70 % Us, trimmer VR2) and maximum (75–100 % Us, trimmer VR1) limits. Trimmer VR3 sets the switch-off level – below it the motor stops. All settings can also be changed via Modbus RTU.

    Result – the fan runs at exactly the speed required and consumes less electricity than when running continuously at full speed. Engineer's note: with an AC induction motor, reducing the voltage increases slip and rotor losses, so the savings are lower than with an EC fan or a frequency inverter. When energy efficiency is the top priority, choose an EC fan; when completely silent operation at low speed is essential, choose a transformer controller with a sinusoidal output voltage.

    Benefits MVSS1-30CDM?
    One module in the control panel combines analogue control, Modbus RTU integration, remote start / timer, an unregulated 230 V output and soft / fast start, while the TK terminals with alarm relay make motor overheating visible in the BMS.

    Technical specifications

    Product type Modular electronic fan speed controller with TK
    Manufacturer / code Sentera Controls / MVSS1-30CDM
    Series MVSS1 (1.5 / 3 / 6 / 10 A)
    Supply voltage 230 VAC ±10 %, 50–60 Hz
    Max. motor current 3 A
    Regulated output (U1, U2) 30–100 % Us (69–230 VAC), RMS
    Min. / max. output limit 30–70 % Us / 75–100 % Us (trimmers VR2 / VR1 or Modbus RTU)
    Unregulated output (L1) 230 VAC, max. 2 A
    Analogue input (Ai) 0-10 / 10-0 VDC or 0-20 / 20-0 mA (DIP switches), input impedance 94 kΩ
    Switch-off level 0–4 VDC / 0–8 mA (increasing mode), 10–6 VDC / 20–12 mA (decreasing mode)
    Potentiometer supply (+V) +12 VDC / 1 mA (for an external 10 kΩ potentiometer)
    Remote start (SW) Yes, as well as timer mode (pulse ≥30 ms)
    Motor thermal protection (TK) TK terminals for motor thermal contacts; overheating is indicated by a red LED and the alarm output
    Alarm output Relay, 230 VAC, 1 A
    Communication Modbus RTU (RS485), configuration with 3SModbus software; NBT line termination resistor jumper
    Start-up mode Soft (softstart) or fast (kickstart)
    Protection Against overheating, overvoltage and overcurrent; fuse F 5 A H 250 VAC, 5×20 mm
    Indication Operation LED (green), Modbus LED, overheating LED (red)
    Housing PA, flammability class UL94 V0, RAL 6017
    Protection class IP20 (EN 60529) – for installation in a control panel only, indoors
    Operating environment -20…+40 °C, 0–80 % rH non-condensing
    Cables Up to 2.5 mm²
    Weight 0.36 kg (net)
    Compliance LVD 2014/35/EU, EMC 2014/30/EU, RoHS (EU) 2015/863

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

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

    Main functions

    • DIN rail mounting – the controller sits in the control panel together with circuit breakers, relays and the controller.
    • Analogue control 0-10 VDC / 0-20 mA – connects directly to CO₂, temperature or pressure sensors or a controller.
    • Modbus RTU – speed, limits and status are controlled and monitored from the BMS or SCADA.
    • TK terminals and alarm relay – motor overheating is visible immediately: a red LED in the control panel and a 230 V / 1 A signal to the BMS, a siren or a lamp.
    • Adjustable min. / max. limits – the minimum limit ensures that the motor always starts and does not stand still while energised, overheating due to too low a voltage; the maximum limit restricts speed and noise.
    • Switch-off level – at a low signal the motor switches off instead of “humming”.
    • Unregulated 230 V output (up to 2 A) – for a damper actuator, valve or indicator lamp without an additional relay.
    • Softstart / kickstart – soft start or reliable run-up at full speed.
    • Timer mode – the fan runs for a set time after a pulse from a push-button or signal.
    • 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?

    • Ventilation and automation control panels with AC fans up to 3 A
    • CO₂-based ventilation of offices, schools and halls
    • Temperature- or humidity-based extraction for warehouses, workshops and garages
    • Duct fans with pressure control
    • Buildings with BMS / SCADA where Modbus RTU is required
    • Control panel upgrades replacing outdated controllers

    On-demand operation

    For the panel builder.
    Standard DIN module – the controller is installed and wired together with the rest of the panel automation.
    For the automation / BMS integrator.
    Modbus RTU allows the status to be read and the settings to be changed from a central system without additional converters.
    For the building administrator.
    Ventilation runs on demand, and all controllers are in one place – in the control panel.

    Application guide: how it is used in practice

    The same MVSS1-30CDM can be used in different projects – only what is connected to its inputs and outputs changes:

    Site What is connected Result Installer's note
    Meeting room, classroom, office CO₂ sensor with 0-10 VDC output → Ai In an empty room the fan runs at min. speed, and speeds up automatically as people arrive Set the min. limit so that the motor rotates reliably (usually 40–50 % Us)
    Warehouse, workshop, garage Temperature sensor with 0-10 VDC → Ai On a hot day extraction increases, on a cool day it drops to the minimum Connect the motor TK contacts – overheating will be signalled via the alarm relay
    Duct system with constant pressure Pressure sensor or PI controller with 0-10 VDC / 0-20 mA → Ai As the filter clogs, the speed increases automatically and the pressure is maintained Select the signal type (V / mA) and direction with the DIP switches
    Building with BMS / SCADA Modbus RTU (RS485) line → A, /B Speed, limits and status are controlled centrally; several controllers with different addresses on one line Fit the NBT jumper on the last device on the line
    Bathrooms, toilets, smoking rooms Push-button or motion contact → SW (timer mode) After a pulse, the fan runs for the set time and then switches off automatically The timer duration is set via Modbus RTU
    Fan with air damper Damper actuator 230 VAC → L1 output When the fan switches on, the damper opens; when it switches off, the damper closes The L1 load (up to 2 A) is counted together with the motor current
    Manual control from the room External 10 kΩ potentiometer (e.g. Sentera SDP-X10K-NA) → +V, Ai, GND Speed is set by the operator, while the controller remains in the control panel Route the signal cable separately from power cables

    How to select the controller current

    Rated current of the motor(s) Recommended model
    up to 1.5 A MVSS1-15CDM (1.5 A)
    1.5–3 A MVSS1-30CDM (3 A) ← this model
    3–6 A MVSS1-60CDM (6 A)
    6–10 A MVSS1100CDM (10 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. The load on the unregulated L1 output (up to 2 A) is counted together with the motor current.
    When to choose another solution: for wall mounting next to the fan – EVSS1-30-DM (IP54); for an EC fan – an EC potentiometer or a controller with 0-10 VDC output; for a three-phase motor – a three-phase transformer controller (e.g. STR-4 series) or a frequency inverter; for a motor without TK contacts – the simpler MVS-1 series.

    Pros

    • DIN rail module for an automation control panel
    • Analogue and Modbus RTU control in one
    • Adjustable speed limits and switch-off level
    • Unregulated output for a damper or lamp
    • Soft or fast start
    • Flame-retardant PA housing (UL94 V0)
    • TK terminals and alarm relay

    Cons / limitations

    • IP20 – for control panel installation only
    • No knob – an external potentiometer is required for manual control
    • Only for single-phase voltage-controllable motors; not suitable for EC fans
    • More expensive than MVS-1 – if the motor has no TK contacts, MVS-1-30CDM is sufficient
    • The output voltage is non-sinusoidal – some motors may hum audibly at low speed

    Safety and installation notes

    • Installation and connection must be carried out by a qualified electrician with the power disconnected.
    • Check that the motor is suitable for voltage control and that its rated current does not exceed 3 A.
    • Several fans can be connected to one controller, provided their total current does not exceed 3 A.
    • Leave space in the control panel for heat dissipation – operating temperature up to +40 °C.
    • 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
    230 VAC
    0-10 VDC / 0-20 mA
    Modbus RTU
    DIN rail
    TK + alarm
    Suitable when you need:
    • to control an AC fan up to 3 A from an automation control panel;
    • to control the speed based on a sensor or controller signal;
    • to integrate the fan into the BMS via Modbus RTU;
    • to see motor overheating in the BMS.
    Check before use:
    • the motor rated current and whether it is voltage-controllable;
    • the control signal type (voltage or current) and direction;
    • whether there is space in the control panel and whether +40 °C will not be exceeded.
    Important reminder: MVSS1-30CDM does not replace a frequency inverter for three-phase motors and does not control EC fans.

    FAQ

    Can it be controlled manually?
    Yes, by connecting an external 10 kΩ potentiometer to the +V, Ai and GND terminals.
    Is it suitable for EC fans?
    No, MVSS1-30CDM is intended only for single-phase voltage-controllable AC motors.
    Can several fans be connected?
    Yes, provided their total current does not exceed 3 A.
    How does it differ from MVS-1-30CDM?
    MVS-1-30CDM has no TK terminals and no alarm relay; all other functions are the same.
    How does it differ from EVSS1-30-DM?
    The functions are similar, but EVSS1-30-DM is wall-mounted (IP54 enclosure), while MVSS1-30CDM is mounted on a DIN rail in a control panel (IP20).
    How to change the settings via Modbus?
    Via RS485 with the CNVT-USB-RS485 converter and the free Sentera 3SModbus software.

    Modular electronic fan speed controller | Modbus RTU | TK | 3A | 230VAC | DIN rail | Sentera Controls | MVSS1-30CDM

    Sentera MVSS1-30CDM – modular DIN rail controller for single-phase AC fans up to 3 A, controlled by a 0-10 VDC / 0-20 mA signal or Modbus RTU, with TK terminals and an alarm relay, adjustable speed limits and an unregulated 230 V output – for automation control panels and BMS projects.

    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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