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  • New item   -55.31€Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 inputs 0-10VDC/0-20mA | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-08
    New item   -55.31€Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 inputs 0-10VDC/0-20mA | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-08 1
    New item   -55.31€Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 inputs 0-10VDC/0-20mA | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-08 2
    New item   -55.31€Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 inputs 0-10VDC/0-20mA | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-08 3

    Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 inputs 0-10VDC/0-20mA | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-08

    Code: DADCM-08
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  • Product description

    Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 inputs 0-10VDC/0-20mA | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-08

    DADCM-08 – a Sentera Controls DIN rail converter that turns analog signals into Modbus RTU registers. It has 4 universal inputs 0-10 VDC / 0-20 mA / PWM and 4 analog inputs 0-10 VDC / 0-20 mA; the input types are selected via Modbus RTU.

    Key idea:
    The converter collects analog sensors from the surroundings of the control panel and provides their values to a BMS or Sentera controller over a single Modbus line – no PLC with analog inputs is needed.
    Inputs
    4 × 0-10 VDC/0-20 mA/PWM + 4 × 0-10 VDC/0-20 mA
    Communication
    Modbus RTU (RS485)
    Power supply
    24 VDC PoM, Imax 40 mA
    Installation / protection
    DIN rail, IP30

    Operating principle

    The converter is mounted on a DIN rail (EN 60715) and connected to the Modbus RTU line with two RJ45 connectors or terminals A, /B, GND, 24 VDC; it receives its 24 VDC supply over the same line (Power over Modbus, Imax 40 mA). Wires – up to 1.5 mm², strip length 8 mm.

    Inputs Ai1–Ai4 accept a 0-10 VDC, 0-20 mA or PWM (5 kHz) signal – the type is selected via Modbus RTU – while inputs Ai5–Ai8 accept 0-10 VDC or 0-20 mA. Input resistance 150 kΩ.

    Result – all measured values are provided in Modbus registers read by the BMS or the Sentera main controller, and only a single RS485 line runs to the BMS. The status is shown by the ON, TX and RX LEDs; the registers can be reset with a jumper P4 (not supplied) on pins 1–2 for ≥20 s.

    Benefits DADCM-08?
    One module brings up to 8 analog signals onto Modbus. Fewer cables to the BMS controller and a simpler wiring diagram.

    Technical specifications

    Product type Analog signal to Modbus RTU converter
    Manufacturer / code Sentera Controls / DADCM-08
    Series DADCM-08 / DADCM-44
    Power supply 24 VDC via Modbus (PoM), Imax 40 mA
    Inputs Ai1–Ai4 0-10 VDC / 0-20 mA / PWM (5 kHz), type selected via Modbus RTU
    Inputs Ai5–Ai8 0-10 VDC / 0-20 mA
    Input resistance 150 kΩ
    Communication Modbus RTU (RS485): 2 × RJ45 or terminals A, /B, GND, 24 VDC
    Indication ON, TX, RX LEDs
    Register reset Jumper P4 (not supplied) on contacts 1–2 for ≥20 s
    Wires up to 1.5 mm², strip length 8 mm
    Installation DIN rail (EN 60715)
    Housing ABS, UL94-V0, grey RAL 7035
    Protection class IP30
    Operating environment -5…+65 °C, 5–85 % rH non-condensing; indoor use only
    Weight 0.120 kg net
    Compliance LVD 2014/35/EU, EMC 2014/30/EU (EN 61000-6-2, EN 61000-6-3, EN 61326-2-3), EN 60730-1, WEEE, RoHS

    Manufacturer documentation

    ✔ Recommended by Elektrotechnikos sprendimai

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

    Main functions

    • Universal inputs – 0-10 VDC, 0-20 mA or PWM – type selected via Modbus.
    • 4 additional analog inputs – a total of 8 analog signals in one DIN module.
    • Power over Modbus – 24 VDC and data over a single cable.
    • Two RJ45 connectors – convenient line extension from module to module.
    • LED indication – power and data exchange are visible at a glance.
    • Terminal connection – terminals A, /B, GND, 24 VDC can be used instead of RJ45.
    • Register reset – factory settings are restored with jumper P4 on pins 1–2 for ≥20 s.

    Where is it used?

    • Connecting analog sensors (pressure, humidity, CO₂) to a Modbus BMS
    • Collecting many analog signals in one panel
    • Automation of air handling units and heating substations
    • Integrating older analog systems into Modbus
    • Collecting the pressure transmitter signals of several ventilation units in one panel
    • Connecting existing 0-20 mA industrial sensors to Modbus

    On-demand operation

    For building automation (BMS) integrators.
    Eight analog signals are available as Modbus registers without additional PLC inputs.
    For HVAC panel manufacturers.
    Eight analog channels in a single 0.12 kg DIN module, powered over PoM.
    For legacy analog system modernizers.
    Moves existing 0-10 VDC and 0-20 mA sensors to Modbus without changing the sensors themselves.

    Practical application

    If the 0-10 VDC signals of four differential pressure transmitters and the 0-20 mA signals of four more sensors have to be collected in a panel, then a single DADCM-08 provides all eight to the BMS as Modbus registers, drawing only up to 40 mA from the PoM line.

    Application guide: how it is used in practice

    The DADCM-08 only ever reads signals and presents them via Modbus – what changes is the connected sensors:

    Site What is connected Result Installer's note
    Duct ventilation system Pressure transmitter 0-10 VDC → Ai1 Pressure is visible in the BMS Set the input type via Modbus
    Humidity / CO₂ control 0-20 mA sensors → Ai2–Ai4 Several rooms – one module Check the power supply of the sensors
    Panel with many analog signals Up to 8 sensors → Ai1–Ai8 All signals under one Modbus address PWM is possible only on Ai1–Ai4
    Fan speed feedback PWM signal → Ai1–Ai4 Status is read via Modbus PWM frequency up to 5 kHz

    How to choose a signal converter

    Task Recommended model
    Modbus → 1 analog output, surface mounting, IP65 MDACM1 (1 × 0-10 V / 0-20 mA / PWM)
    Modbus → 3 analog outputs, DIN rail DDACM-03 (3 outputs, non-isolated)
    Modbus → 3 galvanically isolated outputs, DIN DDACM-I3 (3 isolated outputs)
    8 analog inputs → Modbus, DIN DADCM-08 (4 Ai/Di + 4 Ai) ← this model
    4 analog + 4 temperature (PT500/PT1000) inputs → Modbus DADCM-44 (4 Ai/Di + 4 Ti)
    Rule: if you only need to read 0-10 VDC / 0-20 mA signals – DADCM-08 (8 channels); if some points are PT500/PT1000 temperature probes – DADCM-44. To convert a Modbus command into an analog output – MDACM1 / DDACM series.
    When to choose another solution: for analog outputs from Modbus – DDACM-03, DDACM-I3, MDACM1; for digital inputs / outputs – DIO-M-D4, DIO-M-R2.

    Pros

    • Input types are selected via Modbus
    • 8 analog channels
    • Power over Modbus (PoM)
    • 2 × RJ45 – convenient line extension
    • DIN rail

    Cons / limitations

    • Inputs only – for analog outputs choose DDACM-03 / DDACM-I3
    • IP30 – indoors / panel only
    • A master Modbus device that reads the registers is required
    • PWM is available only on Ai1–Ai4; for PT500 / PT1000 probes – DADCM-44

    Safety and installation notes

    • Installation and connection are to be carried out by a qualified electrician or automation specialist with the power disconnected.
    • Do not exceed the power of the Power over Modbus (PoM) supply – add up the currents of all devices powered on the line.
    • For indoor use only, -5…+65 °C, 5–85 % rH, non-condensing.
    • Perform the register reset (jumper P4) only as instructed.

    Quick selection guide

    Modbus RTU
    4 × 0-10 V / 0-20 mA / PWM
    4 × 0-10 V / 0-20 mA
    24 VDC PoM
    DIN
    IP30
    Suitable when you need:
    • to connect analog sensors to a Modbus BMS;
    • to collect up to 8 analog signals in one module;
    • to reduce the amount of cabling to the controller.
    Check before use:
    • the output type of the sensors (V, mA, PWM);
    • the number of channels;
    • the power reserve of the PoM power supply.
    Important reminder: The DADCM-08 is not a controller – it only presents the measured values in Modbus registers.

    FAQ

    How is the input type selected?
    The type of inputs Ai1–Ai4 (0-10 VDC, 0-20 mA or PWM) is selected via Modbus RTU registers.
    Can PT1000 sensors be connected?
    No, for PT500 / PT1000 probes use the DADCM-44 with inputs Ti1–Ti4.
    Is a separate supply required?
    No, 24 VDC is supplied over Modbus (PoM), and the module draws up to 40 mA.
    Can it be installed outdoors?
    No, the IP30 enclosure is for indoor rooms and panels only, operating environment -5…+65 °C.
    How many analog inputs does the DADCM-08 have?
    Eight in total: Ai1–Ai4 with 0-10 VDC, 0-20 mA or PWM and Ai5–Ai8 with 0-10 VDC or 0-20 mA.
    How do I reset the Modbus registers?
    Place jumper P4 on pins 1–2 for at least 20 s (jumper not supplied).

    Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 inputs 0-10VDC/0-20mA | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-08

    Sentera DADCM-08 – an analog signal to Modbus RTU converter: 4 inputs 0-10 VDC / 0-20 mA / PWM + 4 analog inputs 0-10 VDC / 0-20 mA, 24 VDC PoM, DIN rail, IP30 – for integrating sensors into a BMS.

    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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