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  • New item   -56.4€Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 PT500/PT1000 | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-44
    New item   -56.4€Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 PT500/PT1000 | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-44 1
    New item   -56.4€Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 PT500/PT1000 | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-44 2
    New item   -56.4€Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 PT500/PT1000 | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-44 3
    New item   -56.4€Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 PT500/PT1000 | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-44 4

    Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 PT500/PT1000 | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-44

    Code: DADCM-44
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  • Product description

    Analog signal to Modbus RTU converter | 4 inputs 0-10VDC/0-20mA/PWM + 4 PT500/PT1000 | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-44

    DADCM-44 – a Sentera Controls DIN rail converter that turns analog and temperature signals into Modbus RTU registers. It has 4 universal inputs 0-10 VDC / 0-20 mA / PWM and 4 temperature inputs PT500/PT1000; the input types are selected via Modbus RTU.

    Key idea:
    The converter collects analog sensors and PT500/PT1000 temperature probes 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 × PT500/PT1000
    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, input resistance 150 kΩ. Inputs Ti1–Ti4 are for PT500 or PT1000 temperature sensors – the temperature is read directly, without separate converters.

    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-44?
    One module brings 4 analog signals and 4 PT500/PT1000 temperature points 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-44
    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 Ti1–Ti4 PT500 or PT1000
    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.
    • PT500 / PT1000 inputs – direct connection of temperature probes.
    • 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
    • Water, air and surface temperature measurement with PT500/PT1000 probes
    • Automation of air handling units and heating substations
    • Integrating older analog systems into Modbus
    • Supply and return water temperature measurement in a heat substation with PT1000 probes
    • Outdoor, supply, extract and exhaust air temperature measurement of a ventilation unit

    On-demand operation

    For heat substation automation commissioning engineers.
    PT500 / PT1000 probes connect directly – no separate temperature transmitters are needed.
    For ventilation unit manufacturers.
    Four air temperature and four analog signals in a single DIN module.
    For the energy monitoring contractor.
    Temperature and analog signal values are available via Modbus for logging.

    Practical application

    If in a ventilation unit the outdoor, supply, extract and exhaust air temperatures have to be measured with PT1000 probes, plus the 0-10 VDC signals of two pressure transmitters, then a single DADCM-44 passes everything to Modbus: the probes via Ti1–Ti4, the pressure transmitters via Ai1 and Ai2.

    Application guide: how it is used in practice

    The DADCM-44 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
    Heating substation PT1000 supply and return probes → Ti1–Ti2 Temperatures are read via Modbus Match the PT500 / PT1000 type to the probe
    Air handling unit PT1000 outdoor and supply air probes → Ti3–Ti4 Temperature data for the BMS and controller Wires up to 1.5 mm²

    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)
    4 analog + 4 temperature (PT500/PT1000) inputs → Modbus DADCM-44 (4 Ai/Di + 4 Ti) ← this model
    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
    • Direct PT500/PT1000 connection
    • 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
    • Temperature inputs are PT500 / PT1000 only; for more analog channels – DADCM-08

    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 × PT500/PT1000
    24 VDC PoM
    DIN
    IP30
    Suitable when you need:
    • to connect analog sensors to a Modbus BMS;
    • to read PT500/PT1000 temperature probes via Modbus;
    • to reduce the amount of cabling to the controller.
    Check before use:
    • the output type of the sensors (V, mA, PWM, PT500/PT1000);
    • the number of channels;
    • the power reserve of the PoM power supply.
    Important reminder: The DADCM-44 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?
    Yes, PT500 or PT1000 probes connect to 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.
    Do the Ti inputs accept a 0-10 VDC signal?
    No, Ti1–Ti4 are for PT500 or PT1000 sensors only; for analog signals use Ai1–Ai4.
    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 PT500/PT1000 | 24VDC PoM | DIN rail | IP30 | Sentera Controls | DADCM-44

    Sentera DADCM-44 – an analog signal to Modbus RTU converter: 4 inputs 0-10 VDC / 0-20 mA / PWM + 4 temperature inputs PT500/PT1000, 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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