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  • New item   -45.56€Potentiometer for several EC fans with dry contact | Sentera Controls | SPV-8-010-MF
    New item   -45.56€Potentiometer for several EC fans with dry contact | Sentera Controls | SPV-8-010-MF 1
    New item   -45.56€Potentiometer for several EC fans with dry contact | Sentera Controls | SPV-8-010-MF 2
    New item   -45.56€Potentiometer for several EC fans with dry contact | Sentera Controls | SPV-8-010-MF 3
    New item   -45.56€Potentiometer for several EC fans with dry contact | Sentera Controls | SPV-8-010-MF 4
    New item   -45.56€Potentiometer for several EC fans with dry contact | Sentera Controls | SPV-8-010-MF 5

    Potentiometer for several EC fans with dry contact | Sentera Controls | SPV-8-010-MF

    Code: SPV-8-010-MF
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  • Product description

    Potentiometer for several EC fans with dry contact | Sentera Controls | SPV-8-010-MF

    SPV-8-010-MF – Sentera Controls 230 VAC potentiometer with Modbus RTU, designed for stepless control of several EC motors with a single 0-10 VDC signal. Vmin (0–4 VDC) and Vmax (6–10 VDC) are set via Modbus RTU, and the dry contact (up to 4 A) switches on an external device remotely.

    Key idea:
    One potentiometer – a whole group of fans: the output allows a load down to RL ≥ 1 kΩ, so the control inputs of several EC fans can be connected in parallel and their speed changed simultaneously.
    Power supply
    85–264 VAC, 50–60 Hz
    AO1 output
    0-10 VDC (RL ≥ 1 kΩ)
    Communication
    Modbus RTU (RS485)
    OFF / contact
    Dry contact 4 A

    Operating principle

    The potentiometer is connected to the 85–264 VAC mains (L, N), the Modbus RTU line (A, /B) and the input of the controlled device (AO1, GND), the dry contact – into the external device circuit.

    This is not a power controller – it only generates a control signal, and the speed is changed by the electronics of the EC motors themselves.

    Turning the knob changes AO1 steplessly between Vmin (0–4 VDC) and Vmax (6–10 VDC); normal (min.→max.) or reverse logic is selected via Modbus RTU. Output load – RL ≥ 1 kΩ.

    Engineer's note: the number of fans connected in parallel is not specified in the datasheet – it is determined by the input impedance. For n identical inputs with impedance Ri, the total impedance Ri / n must be ≥ 1 kΩ (e.g. inputs of 10 kΩ each – no more than 10 pcs).

    Benefits SPV-8-010-MF?
    Mains supply, Modbus RTU and manual control in one flush-mounted enclosure – no 24 V power supply unit or separate Modbus module needed. A whole group of fans is controlled with a single signal.

    Technical specifications

    Product type 230 VAC potentiometer with Modbus RTU for several EC fans
    Manufacturer / code Sentera Controls / SPV-8-010-MF
    Series SPV-8 (PM – with OFF, CP – with dry contact, MF – for several EC fans)
    Supply voltage 85–264 VAC, 50–60 Hz
    AO1 output 0-10 VDC, RL ≥ 1 kΩ
    Vmin / Vmax 0–4 VDC / 6–10 VDC (via Modbus RTU)
    Dry contact Max. 4 A, remote ON / OFF
    Communication Modbus RTU (RS485); firmware update, unique ID
    Terminals Supply – spring terminals 2.5 mm², pitch 5 mm; signals – push-in 1.5 mm², pitch 3.5 mm
    Housing ASA, white
    Installation Flush-mounted (IP44) or surface-mounted (IP54)
    Protection class IP44 / IP54
    Operating environment 0–65 °C, 5–95 % rH non-condensing (storage -10…+70 °C)
    Weight 0.20 kg (net)
    Compliance LVD 2014/35/EU, EMC 2014/30/EU, RoHS (EU) 2015/863, WEEE 2012/19/EU

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

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

    Main functions

    • Supply from the mains 85–264 VAC – no 24 V power supply unit needed.
    • Modbus RTU – Vmin, Vmax and direction are set remotely; the device is visible in the BMS.
    • Several EC fans with one signal – output load down to RL ≥ 1 kΩ.
    • Dry contact up to 4 A – remote ON / OFF of external equipment.
    • Normal / reverse logic – the speed increases or decreases as the knob is turned.
    • Universal enclosure – flush-mounted IP44 or surface-mounted IP54, push-in terminals.

    Where is it used?

    • Offices, halls, hotels with BMS
    • EC duct and roof fans
    • Rooms without 24 V automation
    • AC fans with EVS / MVS controllers
    • Damper actuators

    On-demand operation

    For the automation / BMS integrator.
    Settings via Modbus RTU, firmware update possible.
    For the electrician.
    Supply from the existing 230 VAC line.
    For the user.
    A conventional knob in the room.

    Application guide: how it is used in practice

    SPV-8-010-MF can be adapted to different sites – only what is connected changes:

    Site What is connected Result Installer's note
    A group of several fans (e.g. roof fans) AO1 → 0-10 V inputs of all EC fans in parallel All fans change speed synchronously Total input impedance ≥ 1 kΩ
    Office or hall with BMS Modbus RTU → A, /B; AO1 → EC fan Manual control, the BMS sees the setting A unique Modbus address for each device
    Room without 24 V automation L, N ← 230 VAC; AO1 → EC fan Control without a power supply unit Route signal and mains cables separately
    AC fan with an electronic controller AO1 (0-10 VDC) → Sentera EVS / MVS controller input Manual AC fan control Signal GND – to the controller GND
    Damper with a proportional actuator AO1 (0-10 VDC) → actuator Manual damper position control Sentera also lists this application
    Fan with a damper or heater Dry contact → external device circuit Auxiliary equipment is switched on together Contact load ≤ 4 A

    How to select the controller current

    Rated current of the motor(s) Recommended model
    OFF and Modbus RTU needed, one EC fan SPV-8-010-PM (OFF, Modbus RTU)
    Dry contact (4 A) and Modbus RTU needed SPV-8-010-CP (dry contact 4 A, Modbus RTU)
    Control of several EC fans with one signal needed SPV-8-010-MF (0-10 VDC, RL ≥ 1 kΩ, dry contact 4 A) ← this model
    EBM-Papst FFU control via Modbus / DCI needed (up to 20 pcs) SPVL8-010-EP (Modbus / DCI, up to 20 fans)
    Rule: choose according to your needs: one EC fan and OFF – PM; external equipment needs to be controlled – CP (contact 4 A); a group of several fans with one signal – MF (total input resistance ≥ 1 kΩ); EBM-Papst FFU with DCI – SPVL8-010-EP. Motor power has no influence on the selection.
    When to choose another solution: without Modbus with 230 VAC supply – MTVN1 series; with a display and steps – RDCV9-AD; 24 VDC with Modbus – SDP-M010 series; EBM-Papst FFU – SPVL8-010-EP; for an air heater with an EC fan – ECH-8-DM.

    Pros

    • Several EC fans with one signal
    • Dry contact up to 4 A
    • Operating temperature up to 65 °C
    • Supply 85–264 VAC
    • Modbus RTU
    • Vmin / Vmax and direction via Modbus
    • IP44 / IP54

    Cons / limitations

    • 0-10 VDC only – no 0-20 mA or PWM
    • The number of fans is limited by the load RL ≥ 1 kΩ
    • Limits can be changed only via Modbus RTU (a converter and software are required)
    • The terminals carry mains voltage: installation by a qualified electrician only

    Safety and installation notes

    • Installation and connection must be carried out by a qualified electrician with the supply to all connected devices disconnected.
    • The terminals carry mains voltage – connect only with the supply disconnected.
    • Observe the output load limits: RL ≥ 1 kΩ.
    • Dry contact load – no more than 4 A.
    • Connect the Modbus line with twisted-pair cable, in a line topology.

    Quick selection guide

    85–264 VAC
    Modbus RTU
    0-10 VDC
    dry contact 4 A
    IP44 / IP54
    Suitable when you need:
    • control an EC fan from 230 VAC without a power supply unit;
    • integrate manual control into the BMS via Modbus RTU;
    • control several EC fans with a single signal.
    Check before use:
    • the type and resistance of the controlled input;
    • the Modbus address plan and RS485 topology;
    • whether OFF, a dry contact or control of several fans is needed.
    Important reminder: SPV-8-010-MF is a control signal source, not a power controller – the motor current does not flow through it.

    FAQ

    Is a 24 V supply required?
    No, it is supplied with 85–264 VAC, 50–60 Hz.
    How do I change Vmin / Vmax?
    Via Modbus RTU, e.g. with a CNVT-USB-RS485 converter and the Sentera 3SModbus software.
    How many fans can be connected?
    As many as keep the total input resistance ≥ 1 kΩ.
    Can it be used without Modbus?
    Yes, as a manual potentiometer with factory settings.

    Potentiometer for several EC fans with dry contact | Sentera Controls | SPV-8-010-MF

    Sentera SPV-8-010-MF – 230 VAC potentiometer for multiple EC fans with Modbus RTU: 85–264 VAC, 0-10 VDC output RL ≥ 1 kΩ, dry contact 4 A, Vmin / Vmax via Modbus, IP44 / IP54.

    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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