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  •   -43.08€Digital fan speed controller with LED display | Modbus RTU | 1.5A | 110-230VAC | flush-mounted / surface-mounted | IP44/IP54 | black | Sentera Controls | RDCZ9-15-BK
      -43.08€Digital fan speed controller with LED display | Modbus RTU | 1.5A | 110-230VAC | flush-mounted / surface-mounted | IP44/IP54 | black | Sentera Controls | RDCZ9-15-BK 1
      -43.08€Digital fan speed controller with LED display | Modbus RTU | 1.5A | 110-230VAC | flush-mounted / surface-mounted | IP44/IP54 | black | Sentera Controls | RDCZ9-15-BK 2
      -43.08€Digital fan speed controller with LED display | Modbus RTU | 1.5A | 110-230VAC | flush-mounted / surface-mounted | IP44/IP54 | black | Sentera Controls | RDCZ9-15-BK 3
      -43.08€Digital fan speed controller with LED display | Modbus RTU | 1.5A | 110-230VAC | flush-mounted / surface-mounted | IP44/IP54 | black | Sentera Controls | RDCZ9-15-BK 4

    Digital fan speed controller with LED display | Modbus RTU | 1.5A | 110-230VAC | flush-mounted / surface-mounted | IP44/IP54 | black | Sentera Controls | RDCZ9-15-BK

    Code: RDCZ9-15-BK
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  • Product description

    Digital fan speed controller with LED display | Modbus RTU | 1.5A | 110-230VAC | flush-mounted / surface-mounted | IP44/IP54 | black | Sentera Controls | RDCZ9-15-BK

    The RDCZ9-15-BK is a Sentera Controls digital fan speed controller in a black (anthracite) housing for single-phase voltage-controlled AC motors up to 1.5 A. It is operated with 3 buttons and a 3-digit LED display, powered from 110–230 VAC, has a Modbus RTU (RS485) interface and is suitable for flush and surface mounting.

    Key idea:
    A modern wall-mounted controller for residential and office spaces: a display and buttons instead of a knob, speed set smoothly or in 2–10 steps, and the controller integrates into a BMS via Modbus RTU. The black housing matches dark switch series and interiors.
    Max. motor current
    1.5 A (min. load 100 mA)
    Control
    LED display + 3 buttons, Modbus RTU
    Power supply
    110–230 VAC ±10 %, 50–60 Hz
    Installation
    Flush-mounted / surface-mounted, IP44 / IP54

    Operating principle

    The controller is flush-mounted or surface-mounted; connect the power supply (L, N; 110–230 VAC ±10 %, 50–60 Hz), the motor (U1, U2(N)) and, if required, the Modbus RTU line (A, /B), with wires up to 2.5 mm².

    Control is electronic: the output voltage is varied within 30–100 % Us (Us – supply voltage), the minimum limit Umin is 30–65 % Us, the maximum limit Umax is 75–100 % Us, and the output can be smooth or divided into 2–10 equal steps. Start-up is soft or fast (start level 30–100 % Us, duration 2–10 s); settings are made with a 3-digit LED display and 3 buttons, and advanced settings via Modbus RTU with the 3SModbus software.

    Result – a neat black wall-mounted controller with which the user changes the fan speed at a 0.1–1.5 A load, with standby power of less than 2.3 W at 230 VAC. Engineer's note: when energy efficiency matters most, choose an EC fan, and when completely silent operation at low speed is essential – a transformer speed controller with sinusoidal voltage.

    Benefits RDCZ9-15-BK?
    Digital control with a display, step or smooth mode and Modbus RTU – in a compact wall-mounted housing that can be installed both in a flush-mounting box and on the wall.

    Technical specifications

    Product type Digital fan speed controller
    Manufacturer / code Sentera Controls / RDCZ9-15-BK
    Series RDCZ9 (RDCZ9-15-WH white, RDCZ9-15-BK black)
    Enclosure colour Black (anthracite)
    Supply voltage 110–230 VAC ±10 %, 50–60 Hz
    Max. load (U1, U2(N)) 1.5 A
    Min. load 100 mA
    Regulated output 30–100 % Us
    Min. / max. output limit 30–65 % Us / 75–100 % Us
    Output mode Smooth or 2–10 equal steps
    Start-up Soft or fast; start level 30–100 % Us, duration 2–10 s
    Control 3-digit 7-segment LED display, 3 buttons
    Communication Modbus RTU (RS485, A, /B); advanced menu – 3SModbus
    Standby power < 0.9 W (110 VAC / 60 Hz); < 2.3 W (230 VAC / 50 Hz)
    Installation Flush-mounted or surface-mounted
    Housing Outer – ASA plastic, inner – polyamide
    Protection class IP44 / IP54 (EN 60529), indoor use only
    Operating environment -10…+40 °C, 5–80 % rH non-condensing
    Cables Up to 2.5 mm²
    Packaging dimensions 95×85×70 mm
    Weight 0.12 kg net / 0.15 kg gross
    Compliance LVD 2014/35/EU, EMC 2014/30/EU, WEEE 2012/19/EU, RoHS (EU) 2015/863

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

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

    Main functions

    • LED display and 3 buttons – a clear speed setting and a menu that needs no screwdriver.
    • Stepless or stepped mode – speed changes smoothly or in 2–10 equal steps – convenient for the user.
    • Min. / max. limits – Umin 30–65 % Us keeps the motor from stalling at too low a voltage, Umax 75–100 % Us limits speed and noise.
    • Soft / fast start – the start level and the 2–10 s duration are selected according to the fan.
    • Modbus RTU – BMS integration and advanced configuration with the 3SModbus program.
    • Wide power supply range – 110–230 VAC, 50–60 Hz.
    • Low standby consumption – less than 2.3 W at 230 VAC and 0.9 W at 110 VAC.
    • 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?

    • Apartments and houses – bathroom, kitchen, heat recovery or extract fans
    • Offices, meeting rooms
    • Hotel rooms that need a neat wall-mounted controller
    • Sites with a BMS where Modbus RTU is required
    • Rooms with dark interiors – black housing
    • Cafes, shops and salons with dark electrical switches

    On-demand operation

    For the interior designer.
    The black (anthracite) housing matches dark switches and a modern interior.
    For the apartment and house electrician.
    Installs in a flush-mounted box or on the wall, terminals L, N, U1, U2(N), A, /B.
    For hotel maintenance managers.
    Modbus RTU allows room fans to be integrated into the BMS.

    Practical application

    If a bathroom extract fan draws 0.4 A and must start reliably, then on the RDCZ9-15-BK set a fast start at the 100 % Us level for 2 s, Umin to 40 % Us, and divide the output into 3 steps so that the user can choose clear speeds with the buttons.

    Application guide: how it is used in practice

    Typical RDCZ9-15-BK applications:

    Site What is connected Result Installer's note
    Bathroom, kitchen Extract fan → U1, U2(N) The user selects the speed with the buttons It is convenient to set 3–5 steps instead of smooth mode
    Office, meeting room Duct fan up to 1.5 A Speed varies with the number of people Limit Umax if it is too noisy at maximum speed
    Building with BMS Modbus RTU → A, /B Speed and settings are controlled centrally For configuration – CNVT-USB-RS485 and 3SModbus
    Motor with difficult start-up Quick start-up, duration 2–10 s The motor starts reliably and moves up to the set speed Set the start level high enough

    How to select the controller current

    Rated current of the motor(s) Recommended model
    up to 1.5 A · white housing RDCZ9-15-WH (1.5 A, white)
    up to 1.5 A · black (anthracite) housing RDCZ9-15-BK (1.5 A, black) ← this model
    Rule: the controller's max. current ≥ the rated current of the motor (or the sum of several motors) from the motor nameplate. The starting current has already been taken into account by the manufacturer, no extra margin is needed. When connecting several fans – of the same type, AC motors with voltage control – add up their rated currents. In the RDCZ9 series all models are 1.5 A (min. load 100 mA); choose by housing color.
    When to choose another solution: white housing – RDCZ9-15-WH; for EC fans – RDCV9-AD series digital controller; for higher current or control by a 0-10 VDC sensor – EVS-1 series; manual knob control for higher currents – ITR-9 series; quiet operation on sinusoidal voltage – transformer speed controllers.

    Pros

    • LED display and 3 buttons
    • Stepless or 2–10 step mode
    • Modbus RTU for BMS integration
    • Flush and surface mounting
    • Power supply 110–230 VAC
    • Black (anthracite) housing

    Cons / limitations

    • Max. load only 1.5 A – for small fans
    • Min. load 100 mA – may not suit very small motors
    • No 0-10 VDC input for a sensor
    • Single-phase voltage-controllable AC motors only; not suitable for EC fans
    • Indoor use only

    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 is between 100 mA and 1.5 A.
    • Wire cross-section – up to 2.5 mm².
    • For indoor use only: -10…+40 °C, 5–80 % rH, non-condensing.

    Quick selection guide

    1.5 A
    110–230 VAC
    LED display
    Modbus RTU
    Black
    Suitable when you need:
    • for manual digital speed control of a fan up to 1.5 A;
    • a neat wall-mounted controller in residential and office premises;
    • integration into a BMS via Modbus RTU.
    Check before use:
    • the rated motor current (100 mA – 1.5 A) and whether it is voltage-controlled;
    • the mounting method – flush or surface;
    • the housing color (black – BK, white – WH).
    Important reminder: The RDCZ9-15-BK does not control EC fans or three-phase motors, and the maximum load is 1.5 A.

    FAQ

    Is it suitable for EC fans?
    No, the RDCZ9-15-BK is intended for single-phase voltage-controlled AC motors; for EC fans, use the RDCV9-AD series.
    Can the steps be set?
    Yes, the output can be smooth or divided into 2–10 equal steps.
    Can it be mounted on a wall without a box?
    Yes, the controller suits both flush and surface mounting.
    How do I change the advanced settings?
    Via Modbus RTU with the CNVT-USB-RS485 converter and the free Sentera 3SModbus software.
    How does it differ from RDCZ9-15-WH?
    Only the housing color differs: BK – black (anthracite), WH – white.
    Can several fans be connected?
    Yes, if their total current does not exceed 1.5 A and the motors are of the same type.

    Digital fan speed controller with LED display | Modbus RTU | 1.5A | 110-230VAC | flush-mounted / surface-mounted | IP44/IP54 | black | Sentera Controls | RDCZ9-15-BK

    Sentera RDCZ9-15-BK – black digital fan speed controller with LED display and 3 buttons, up to 1.5 A, 110–230 VAC, smooth or 2–10 step mode, Modbus RTU, flush or surface mounting.

    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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