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    AI Overview

    An AI Overview is not available for this searchCan't generate an AI overview right now. Try again later.
    AI Overview
    HVAC Thermostat With RS485 Modbus, Keycard, External Sensor ...
    A Modbus RTU thermostat is a digital temperature controller designed for industrial, commercial, or smart home HVAC systems, using RS485 serial communication for reliable, wired data exchange. These devices connect to Building Management Systems (BMS) to control HVAC, fan coils, and underfloor heating, often allowing parameter adjustments like temperature setpoints, fan speeds, and mode selections. 
    Key Features and Technical Details 
    • Communication Protocol: Uses Modbus RTU over RS-485, typically supporting baud rates of 4800, 9600, 19200, and 38400 bps.
    • Networking: Operates as a slave device on an RS-485 network, with address ranges generally between 1 and 247.
    • Functionality: Enables reading of current room temperature, setpoints, and humidity, as well as writing to control HVAC states.
    • HVAC Control: Suitable for various systems including FCU (fan coil units), 2H/2C (heating/cooling) systems, and proportional 0-10V control.
    • Integration: Commonly used with automation systems like Home Assistant, PLCs, or building controllers. 
    Typical Technical Specifications 
    • Power Supply: Usually 24VAC/DC or 220V AC, depending on the model.
    • Accuracy: Often features high precision, e.g.,
      ±0.1∘Cplus or minus 0.1 raised to the composed with power C
      ±0.1∘C
      .
    • Interface: Often features a digital LCD or touch screen for local, direct, or, in some cases, smartphone-based control (e.g., WIFI enabled). 
    Examples and Use Cases 
    • SASWELL DX Thermostat: High-precision commercial BMS control.
    • Siemens RDF302: Modbus RTU communicating thermostat.
    • Hotowell HTW-WF03-FC: Smart WIFI and Modbus FCU thermostat. 
    Installation Considerations 
    • Wiring: Requires RS-485 twisted pair wiring (A+ and B-) in a daisy-chain configuration.
    • Termination: A
      120
      Ω
       resistor is typically required at the end of the bus for signal integrity.
    • Addressing: Each thermostat must have a unique ID configured to avoid communication conflicts. 
    • DX Thermostat with Modbus RTU for BMS Control - SASWELL
      High-precision DX Thermostat with Modbus RTU (RS485) and 3-speed fan for Commercial BMS Control. Ideal for 2H/2C HVAC systems, off...
      SASWELL
    • Temperature Controller with Modbus - Building Automation
      Honeywell Temperature Controller is a microprocessor based LCD temperature controller that provides proportional plus integral and...
      Honeywell Building Automation
    • Home assistant with RS485 Modbus RTU wired network
      Aug 14, 2024 — there are several forms of wired communication. but the most commonly used ones are the Modbus protocol TCP which is physically do...
      YouTube·Progs Pont
      16:18
    Show all
    • DX Thermostat with Modbus RTU for BMS Control - SASWELL
      High-precision DX Thermostat with Modbus RTU (RS485) and 3-speed fan for Commercial BMS Control. Ideal for 2H/2C HVAC systems, off...
      SASWELL
    • Modbus RTU mode - Basic Documentation - RDF302
      Jun 17, 2022 — The RDF302, RDF302/VB, and RDF302.B thermostats support Modbus RTU mode communication protocol. The device address range is 1 to 2...
      Siemens
    • Home assistant with RS485 Modbus RTU wired network
      Aug 14, 2024 — there are several forms of wired communication. but the most commonly used ones are the Modbus protocol TCP which is physically do...
      YouTube·Progs Pont
      16:18
    • Temperature Controller with Modbus - Building Automation
      Honeywell Temperature Controller is a microprocessor based LCD temperature controller that provides proportional plus integral and...
      Honeywell Building Automation
    • FCU System Hotel Smart Thermostat with Modbus RTU ... - Hotowell
      >> Dimensions and Display * 2022 3 Stage Digital Multi Room heat pump Thermostat. HTW-MT08. * Digital 24V Modulating Fan Coil Unit...
      Hotowell
    • RS485 Modbus Smart Thermostat for fan coil, valve, heat pump or ...
      Whether you're at home or away, you can effortlessly adjust the temperature settings to ensure optimal comfort and energy efficien...
      www.etopcontrols.com
    • Touchscreen Thermostat With Modbus RTU Communication 24VAC/ ...
      Specification * Power supply: 24Vac/dc. * Communication: Modbus RTU. * Interface: RS485, maximum 63 devices. * Addressing: 1..127 ...
      Ocean Controls
    • Connecting Devices via the Modbus (RS 485 Bus)
      Jul 1, 2025 — don't forget to enter the advanced settings to do this once again click the gear icon at the top of the screen update date every e...
      YouTube·i3 Engineering
      1m
    • Modbus RTU Thermostat - Wall Mounted, Energy Saving
      Types of Modbus RTU Thermostats A Modbus RTU thermostat is a digital temperature control device that communicates using the Modbus...
      Alibaba.com
    • Modulating Thermostat for BMS Modbus 485 & WIFI Control
      Product Feature. The SAS965PIT is the professional choice for a High-precision Modulating Thermostat. Utilizing proportional contr...
      SASWELL
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    My Ad Center

    Modbus Thermostat - WiFi - OEM


    Alledio
    https://www.alledio.com › alledio-oem-thermostat-mod...
    Alledio
    https://www.alledio.com › alledio-oem-thermostat-mod...
    Alledio Thermostat is the world's most flexible and adaptable OEM Modbus thermostat solution, featuring a customizable user interface and firmware.Read more

    Modbus Thermostats


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    NetX X7 thermostats deliver unprecedented flexibility for Building Automation control and BAS platform integrations at multiple levels.Read more

    Search


    etopcontrols.com
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    etopcontrols.com
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    Mar 29, 2023 — Looking for professional Modbus RTU thermostats manufacturer? E-TOP specializes in producing Modbus RTU thermostats, wholesale now!

    MODBUS Thermostat


    Smart PIERRE
    https://wiki.smartpierre.com › solutions › heating-cooling
    Smart PIERRE
    https://wiki.smartpierre.com › solutions › heating-cooling
    Temperature Control: The Modbus thermostat sends real-time temperature data to the Pierre controller, which adjusts heating and cooling accordingly. This allows ...Read more
    Videos
    Connecting Devices via the Modbus (RS 485 Bus)
    YouTube · i3 Engineering
    Jul 1, 2025
    YouTube · i3 Engineering
    13:16
    Learn to connect a thermostat, temperature/humidity sensor, and thermostatic head using Modbus RTU protocol over RS485 interface.
    i3 Engineering
    YouTube·
    Jul 1, 2025

    Connecting Devices via the Modbus (RS 485 Bus)

    YouTube·i3 Engineering·Jul 1, 2025
    YouTube
    In this video
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    PIERRE Academy - Modbus Thermostat Integration
    YouTube · PIERRE Smart Home Solution
    Feb 14, 2025
    YouTube · PIERRE Smart Home Solution
    3:23
    Integrate a Modbus thermostat into your smart system using the Pierre app for precise temperature control, connecting wires and setting the address.
    PIERRE Smart Home Solution
    YouTube·
    Feb 14, 2025

    PIERRE Academy - Modbus Thermostat Integration

    YouTube·PIERRE Smart Home Solution·Feb 14, 2025
    YouTube
    PC programming temperature controller with RS485-USB ...
    YouTube · ATO Automation
    Apr 29, 2019
    YouTube · ATO Automation
    6:24
    ATO Automation
    YouTube·
    Apr 30, 2019

    PC programming temperature controller with RS485-USB ...

    YouTube·ATO Automation·Apr 30, 2019
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    Modbus RTU mode - Basic Documentation - RDF302.B


    Siemens
    https://sid.siemens.com › 83f1ef79adfa53cd8703a4a58...
    Siemens
    https://sid.siemens.com › 83f1ef79adfa53cd8703a4a58...
    Jun 17, 2022 — The RDF302, RDF302/VB and RDF302.B thermostats support communication protocol (Modbus RTU mode) as per the Modbus specification.Read more

    Modbus Touchscreen Thermostat


    eBay
    https://www.ebay.com › itm
    eBay
    https://www.ebay.com › itm
    The MOD models have built-in Modbus RTU communications. The thermostats can also be configured to be used as a lighting and/or air conditioning interface.Read more
    $200.00 · In stock · Free delivery

    RS485& Modbus RTU 0-10V 24V 95-240V Remotely ...


    AliExpress
    https://www.aliexpress.com › ...
    AliExpress
    https://www.aliexpress.com › ...
    This RS485 & Modbus RTU thermostat supports 0-10V, 24V, and 95-240V inputs for remote temperature control. Ideal for fan coil systems, it enables efficient ...

    DX Thermostat with Modbus RTU for BMS Control


    SASWELL
    https://www.saswell.com › DX-Unit-Thermostats › DX-T...
    SASWELL
    https://www.saswell.com › DX-Unit-Thermostats › DX-T...
    High-precision DX Thermostat with Modbus RTU (RS485) and 3-speed fan for Commercial BMS Control. Ideal for 2H/2C HVAC systems, offering ±0.1°C accuracy.

    Modbus LCD Thermostat - Specification and Installation ...


    Neptronic
    https://www.neptronic.com › PDF › STDL24
    Neptronic
    https://www.neptronic.com › PDF › STDL24
    PDF
    Backlit LCD with simple icon and text driven menus. • Built-in temperature sensor. • External temperature sensor input (10 KΩ). • Adjustable setpoints. • ...Read more
    8 pages
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    What is the difference between Modbus TCP and Modbus ...


    etopcontrols.com
    https://www.etopcontrols.com › what-is-the-difference-...
    etopcontrols.com
    https://www.etopcontrols.com › what-is-the-difference-...
    Jun 11, 2024 — In summary, Modbus RTU is more suitable for industrial field environments, with shorter transmission distances and stronger anti-interference ...Read more
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