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  •   -163.32€Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 85-264VAC | IP30 | Sentera Controls | FCMF8-R

    Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 85-264VAC | IP30 | Sentera Controls | FCMF8-R

    Code: FCMF8-R
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  • Product description

    Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 85-264VAC | IP30 | Sentera Controls | FCMF8-R

    FCMF8-R – a Sentera Controls smart flush-mounted CO2 sensor-controller that measures CO2 concentration (400–2000 ppm), temperature (0…+50 °C) and relative humidity (0–95 % rH) in the room and has one control output (0-10 VDC, 0-20 mA or PWM), which the integrated algorithm calculates from the highest of the T, rH and CO2 values. Supply – 85–264 VAC, 50–60 Hz.

    Key idea:
    This is demand-controlled ventilation “out of the box”: the sensor itself decides how much ventilation is needed and directly controls an EC fan, an AC speed controller or a damper actuator. Any of the three measured quantities can be disabled – e.g. to control by CO2 only.
    CO2 range
    400–2000 ppm
    Output
    1 × 0-10 VDC / 0-20 mA / PWM
    Power supply
    85–264 VAC, 50–60 Hz
    Protection
    IP30, indoors only

    Operating principle

    The device is flush-mounted in a wall box or surface-mounted on the wall and connected directly to the mains (L, N; 85–264 VAC); output – Ao and GND, Modbus RTU – A, /B (with Cat5 or EIB cable).

    The CO2 sensor, together with the temperature and humidity sensor, measures air quality (the CO2 sensor needs 2 min of warm-up to operate and 10 min for full accuracy), and all parameters are available over Modbus RTU. A range is set for each quantity, and the output (0–100 %) follows the highest of the three calculated values; the output type is 0-10 VDC (≥ 50 kΩ), 0-20 mA (≤ 500 Ω) or 1 kHz PWM (3.3 or 12 VDC), so it directly controls an EC fan, an AC fan speed controller or a damper actuator.

    Result – ventilation according to the actual number of people and air quality: in an empty room ventilation runs at a minimum, and as people gather it increases, which reduces heating / cooling losses and fan energy consumption.

    Benefits FCMF8-R?
    CO2, temperature, humidity and a control algorithm in one device – demand-controlled ventilation without a separate controller or programming.

    Technical specifications

    Product type Smart flush-mounted CO2 sensor-controller
    Manufacturer / code Sentera Controls / FCMF8-R
    Measured quantities CO2, temperature, relative humidity
    CO2 range 400–2000 ppm
    Temperature range 0…+50 °C
    Humidity range 0–95 % rH, non-condensing
    Accuracy ±0.4 °C (5…50 °C), ±0.8 °C (-20…50 °C); ±3 % rH (20–80 %), ±5 % rH (5–95 %); CO2 ±(45 ppm + 3 %)
    Outputs AO1 according to the highest of T / rH / CO2: 0-10 VDC (RL ≥ 50 kΩ) / 0-20 mA (RL ≤ 500 Ω) / PWM 1 kHz, 3.3 or 12 VDC
    Communication Modbus RTU (RS485); firmware update via Modbus RTU
    Supply voltage 85–264 VAC, 50–60 Hz
    Indication Red / yellow / green LED
    Installation Flush-mounted or surface-mounted
    Housing ABS plastic, white outside, black inside
    Protection class IP30 (EN 60529), indoor use only
    Storage temperature -10…+60 °C
    Weight 0.17 kg (net)
    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

    • Integrated algorithm – the output follows the highest of T, rH and CO2 – direct control of an EC fan, an AC controller or a damper.
    • Parameters that can be disabled – can be controlled by CO2 only or any combination.
    • Modbus RTU – all measurements and settings are accessible remotely.
    • Firmware update – over the Modbus RTU network.
    • LED indication – red – value out of range or sensor fault, yellow – danger zone, green – normal; the CO2 level is shown by default.
    • Configuration – Configuration and monitoring – the free Sentera 3SModbus software (via the CNVT-USB-RS485 converter) or the Sensistant Modbus configurator.

    Where is it used?

    • Offices, meeting rooms, classrooms
    • Kindergartens, schools, auditoriums
    • Residential rooms and apartments
    • Restaurants, gyms
    • Demand-controlled ventilation with EC fans
    • BMS and SenteraWeb systems

    On-demand operation

    For the apartment and house electrician.
    The CO2 sensor-controller is powered directly from 230 V in a flush-mounted box, so no 24 V power supply is needed.
    For school and kindergarten renovation designers.
    In a classroom, ventilation automatically intensifies as CO2 rises, and in an empty room it runs at the minimum.
    For restaurant and gym owners.
    The fans run according to the actual number of people, so heating and electricity consumption fall.

    Practical application

    If in a classroom only 230 V is available at the flush-mounted box and the ventilation EC fan has a 0-10 VDC input, then the FCMF8-R is connected directly to the mains and, as CO2 rises within the set 400–2000 ppm range, proportionally increases the fan speed.

    Application guide: how it is used in practice

    The same FCMF8-R adapts to different sites – only what is connected to its outputs changes:

    Site What is connected Result Installer's note
    Classroom, conference room AO1 0-10 VDC → EC fan control input The fan speeds up as CO2 rises; in an empty room – minimum T and rH can be disabled – control by CO2 only
    Room with a VAV / air damper AO1 → damper actuator 0-10 VDC input The damper opens in proportion to air quality Actuator input resistance ≥ 50 kΩ
    AC fan AO1 → analog input of an electronic or transformer controller AC fan speed according to CO2 Check the speed controller's input signal type
    Building with BMS Modbus RTU → A, /B Measurements and settings centralised A separate address for each device
    Apartment or office without 24 V supply L, N ← 230 VAC mains No separate power supply needed To be connected by a qualified electrician with the power disconnected

    How to choose a CO2 transmitter

    Installation / output / power supply Recommended model
    Room, 3 separate outputs T / rH / CO2, 24 VDC, 4 wires RSMFF-3 (multifunction transmitter, -F)
    Room, 3 separate outputs T / rH / CO2, 24 VDC or 24 VAC, 3 wires RSMFG-3 (multifunction transmitter, -G)
    Room, 1 control output based on T / rH / CO2, 24 VDC RCMFF-3 (smart sensor, -F)
    Room, 1 control output, 24 VDC or 24 VAC RCMFG-3 (smart sensor, -G)
    Flush-mounted / surface-mounted, 1 output, powered from the 230 V mains FCMF8-R (85–264 VAC) ← this model
    Flush-mounted / surface-mounted, 1 output, 24 VDC or 24 VAC FCMFG-R (24 VAC/VDC)
    Duct, 1 control output based on T / rH / CO2, 24 VAC/VDC DCMFG-2R (smart duct sensor)
    Duct, NDIR CO2 + T + rH, Modbus RTU only DSCDG0-4 (no analog outputs)
    Duct, NDIR CO2 + T + rH, 3 analog outputs + Modbus RTU DSCDG3-4 (3 outputs)
    Rule: by installation location (wall, flush-mounting box, duct) and by what is needed: separate T / rH / CO2 signals for a controller or BMS (transmitter, 3 outputs), a single control signal directly to an EC fan or damper (smart sensor), or Modbus data only. Choose the supply according to the site's control circuit: -F – 24 VDC, 4-wire; -G – 24 VAC or 24 VDC, 3-wire; 8 – directly from the 230 V mains.
    When to choose another solution: for wall mounting – RCMF-3 series; for separate signals – RSMF-3 series; without CO2 – FCTH series; for a duct – DCMFG-2R.

    Pros

    • CO2, temperature and humidity in one device
    • Modbus RTU, firmware updated over the network
    • Integrated control algorithm – no separate controller needed
    • Power directly from the 230 V mains
    • Flush-mounted or surface-mounted installation

    Cons / limitations

    • One control output – for separate signals choose a transmitter
    • CO2 measuring range 400–2000 ppm – intended for indoor air quality, not for industrial gas monitoring
    • IP30 – dry rooms only

    Safety and installation notes

    • Installation and connection are to be carried out by a qualified electrician / automation specialist with the power disconnected.
    • Supply voltage – 85–264 VAC, 50–60 Hz.
    • Hazardous mains voltage is present on terminals L, N – connect only with the power disconnected.
    • Resetting the Modbus communication parameters – with a jumper on PROG pins 1 and 2 for at least 5 s.
    • For indoor use only; do not install in direct sunlight.

    Quick selection guide

    CO2 400–2000 ppm
    0…+50 °C
    0–95 % rH
    0-10 VDC / 0-20 mA / PWM
    85–264 VAC, 50–60 Hz
    IP30
    Suitable when you need:
    • to implement demand-controlled ventilation by CO2 level;
    • to control an EC fan or damper directly from the sensor;
    • to integrate air quality data into a BMS via Modbus RTU.
    Check before use:
    • the input type of the controlled device;
    • the supply: 85–264 VAC, 50–60 Hz;
    • the installation location – an occupied zone, not near doors or windows.
    Important reminder: The FCMF8-R measures CO2 to assess indoor air quality; it is not a gas leak or safety detector.

    FAQ

    Does it measure VOC?
    No, CO2, temperature and relative humidity are measured.
    Can it be controlled by CO2 only?
    Yes, the temperature and humidity parameters can be disabled.
    What are the output signals?
    One output 0-10 VDC, 0-20 mA or PWM and Modbus RTU.
    How are the settings changed?
    Via Modbus RTU – the 3SModbus software with a CNVT-USB-RS485 converter, or via BMS.
    How do I reset the Modbus settings?
    With a jumper on PROG contacts 1 and 2 for at least 5 seconds.
    Is a 24 V power supply unit required?
    No, the FCMF8-R is powered directly from 85–264 VAC.

    Smart flush-mounted CO2 sensor-controller | CO2 400-2000ppm | T 0…50°C | 0-95%rH | 0-10VDC/0-20mA/PWM | Modbus RTU | 85-264VAC | IP30 | Sentera Controls | FCMF8-R

    Sentera FCMF8-R – smart flush-mounted CO2 sensor-controller: CO2 400–2000 ppm, temperature 0…+50 °C, humidity 0–95 % rH, 0-10 VDC / 0-20 mA / PWM control output and Modbus RTU, 85–264 VAC, 50–60 Hz supply. For demand-controlled ventilation.

    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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