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smart-MAIC D103


  1. Introduction

    Purpose of the device and its functions

    Controlled output

    Location of device components 4

    Device status indicator

  2. Getting Started

    Installation and connection

  3. Connection diagram

  4. Connecting to your wireless network

  5. Data check

  6. Reset and restore factory settings

  7. Maintenance of the device

  8. MQTT Service

  9. Conditions and Notices

  10. Scope of delivery

  11. Specifications

  12. Access to data. Visualization


    Thank you for purchasing the smart-MAIC 103 Energy Monitor. This device allows you to measure and record changes in electricity consumption and power grid parameters in three phases or three lines in a single-phase network.

    Purpose of the device and its functions

    The device is designed for continuous measurement of electrical network parameters and electricity consumption.

    The device measures the following parameters:

    • voltage, V

    • current strength, A

    • active power, W

    • reverse * active power, rW

    • active energy, Wh

    • reverse * active energy, rWh

    • Power factor (cosФ)

      * parameters are available in the extended version of the device

      Communication with the device is carried out via the IEEE 802.11 Wi-Fi 2.4 GHz wireless communication protocol.

      The device transfers the accumulated data to the "cloud" server for further analysis and visualization. For more information about the processing capabilities of the data received from the device, see the WEB page www.smart-maic.com .

      Current data is also available on the built-in WEB site of the device.

      Controlled output

      The device is equipped with a controlled dry contact output. The controlled output is intended for automation of load control. The output can control power solid-state relays to which electrical appliances are connected, or for building automation in low-current networks.

      The output is controlled remotely, on the device's WEB page or from the server. It is also possible to control the output according to predefined conditions and / or schedule.

      The controlled output is intended for switching power loads no more than 50W.

      Location of device components

      The device is made in a housing for installation on a DIN rail with an IP20 protection level. When installing at the monitoring object, it is necessary to use a mounting box made of plastic with a level of dust and moisture protection IP54 for indoor installation or IP65 for outdoor installation. For outdoor installations, avoid direct sunlight.

      The figure shows the main components of the device.


      Top view


      Upper group of contacts for

      connecting current transformers


      Reset button


      Bottom group of contacts for power connection


      Device status indicator

      Device status indicator

      The device status indicator is located on the front panel. The indicator signals the following device states:

      The indicator state

      Device status

      The indicator flashing quickly

      Search is performed and wireless network connection

      The indicator flashing slowly

      The built-in access point is activated, it is possible to connect to the device to configure the parameters

      The indicator is on continuously

      The device connected to the wireless network

      The indicator does not work

      • the device is turned off, or

      • defective or

      • indicator is off in settings


    Installation and connection

    The device can be installed in an electrical panel on a DIN rail. Follow the steps below to install the device:

    1. Mount the device on a DIN rail.

    2. Secure the device by sliding the latch up.

    The connection of the device to the mains must be carried out by trained personnel with a permit of at least group III for electrical safety when working on installations up to 1000 V

    To connect the device, run next steps:

    1. Connect the leads of the current transformers to the device according to the wiring diagram. If your transformers are equipped with a quick plug, do not connect them to a running device. Connecting a transformer plug to an operating device may damage the device.

    2. Slide the current transformers over the wires of the 1st, 2nd and 3rd phase. Current transformers are numbered (1-2-3) and have a power direction indicator. It is accepted that the energy moves in the direction from the electricity meter towards the consumers. Installing the current transformers in accordance with the energy direction indicators will give the best measurement accuracy.

    3. Connect three phases and a neutral wire to the device in accordance with the connection diagram.


    General connection diagram in a 3-phase network


    Connection diagrams of current transformers and power lines for different device modifications

    Transformers clips 100A
    to Jack connectors


    Upper contact group


    controlled output


    controlled output


    current transformer No. 1


    current transformer No. 2


    current transformer No. 3

    Transformers rings 100A and
    Rogowski rings 1000A . . 2000A


    Upper contact group


    controlled output


    controlled output


    current transformer No. 1, red wire


    current transformer No. 1, black wire


    current transformer No. 2, red wire


    current transformer No. 2, black wire


    current transformer No. 3, red wire


    current transformer No. 3, black wire

    Transformers 300A / 600A


    Upper contact group


    controlled output


    controlled output


    current transformer No. 1, white wire


    current transformer No. 1, black wire


    current transformer No. 2, white wire


    current transformer No. 2, black wire


    current transformer No. 3, white wire


    current transformer No. 3, black wire

    Pay attention to the location of the power supply terminals for different versions of the D103 G1/G2 devices and for D103 G3.
    All terminals are signed.
    Note, the current and the voltage must be measured from the same line.

    D103 G1/G2

    D103 G3





    Do not put unconnected

    current transformers on the wire.

    This can damage the transformers.

    Smart-MAIC D103 connection in a single-phase network


    The smart-MAIC D103 energy monitor is a 3-line device that can be installed in a single- phase network to monitor lines to different consumers (boiler, air conditioner, kitchen, sockets, lighting, etc.)

    Connect power to one of the inputs and set jumpers for the remaining power inputs L1 L2 L3.

    Connect the current trans- formers and put them on the corresponding lines that go to the consumers.


    For normal operation of the device, it is necessary, in the place of its installation, to provide a good signal of your wireless network with Internet access. When you start it for the first time or after a short press on the Reset button, the device enters the wireless access point mode.

    On your computer or phone, go to the list of wireless networks and select the smart-MAIC123456789 network connection. If the “smart-MAIC” network is absent, briefly press the RESET button on your device. The default connection password is missing.

    After successful connection, enter in the address bar of the browser and go to the built-in WEB site of the device.

    In the "WiFi and Network" section, select your network name from the list of wireless networks, enter your network password and click the "Connect" button.


    If there is no name (SSID) of your network in the list of wireless networks, refresh the list by clicking the "Refresh" button.

    Wait a minute and reconnect to the device's access point again. Reload the device settings page and make sure that the connection is successful and the device's internal IP address is in the status bar. Disconnect from the device's hotspot and connect to your WiFi network. Go to the built-in WEB site of the device using the IP address obtained when connecting and continue configuring the parameters.

    General tips if you are having problems connecting to WiFi:

    1. For stable operation, the signal level must be greater than -80dB, i.e. better than -70dB.

    2. Try changing the WiFi type to "G (up to 54Mbs)" in the device settings.

    3. Try changing the channel on your router.

    4. Try connecting the device to a different router to diagnose the problem.

    For more information on connecting to a wireless network, see the Knowledge Base >>

    In the "Configuration" section, select the language of the WEB interface convenient for you. Change the PIN for entering the WEB interface of the device.


    The default PIN 0000 will not allow you to connect devices to your account on the "cloud server".

    The PIN must consist of numbers and be no more than 10 in length. Your new PIN will allow you to access data from your device stored on the "cloud server".

    In the "Data Server" section, check the connection of the device to the "cloud" server.


    In the "Status" section, look at and copy the device ID for yourself. You will need the device ID to connect the device to the "cloud server".





    Before connecting a device to the Dashboard read this section carefully.

    Measured data

    It is important to understand how the data from the smart-MAIC energy monitor is saved at different time intervals. It is especially important to understand the calculation principle for the Power

    [W] parameter when it is converted from electrical power into electrical energy.

    Energy Monitor Data, Designation

    Current readings and minute interval

    Hourly, daily, weekly, monthly, yearly interval

    Voltage, V1 V2 V3

    Voltage in [V]

    Average arith. in [V]

    Current, А1, A2, A3 и TA (total)

    Current in [A]

    Arithm mean. in [A]

    Power, W1, W2, W3

    и TW (всего)

    Instantaneous active power [W] or [W]

    Active energy for a period [Wh] or [W * h]

    Reverse Power, rW1, rW2, rW3и TrW (всего)

    Instantaneous reversible active power [W] or [W]

    Reversible active energy per period [Wh] or [W * h]

    Power Factor, PF1, PF2, PF3

    Power factor (cosF)

    Arithmetic mean power factor (cosF)

    Energy, Wh1, Wh2,

    Wh3 и TWh (всего)

    Cumulative electricity meter [Wh] or [W * h]

    The same, cumulative electricity meter [Wh] or [W * h]

    Reverse Energy, rWh1, rWh2, rWh3

    и TrWh (всего)

    Cumulative counter of reversible electricity [Wh]

    or [W * h]

    The same, accumulative counter of reversible electricity

    [Wh] or [W * h]

    As mentioned, there is an arrow on every current transformer. If the arrow is positioned towards the consumer, the monitoring data will be saved as follows:

    • active power (consumption) in the [W] Power parameter;

    • reversible active power (generation) in the [rW] Revers Power parameter;

    • accumulative meter of consumed energy in [Wh] Energy;

    • accumulative counter of reversible energy in [rWh] Energy.


    Go to the device page in the "Data" section and check the correctness of the readings. When connected correctly, the Power Factor [PF] parameter should tend to 1.00. Also check the logic and correctness of the connection if you see the word Revers.

    For more information, please check out the articles on our portal. >> link


    To synchronize the accumulative meter [Wh] Energy and [rWh] Rev.Energy with the readings of your electricity meter, set the initial values for the accumulated data in the device settings in the "Data" section, note that the device measures electricity in watts, so your meter needs kilowatts multiply by 1000 to get watts. If your meter displays only the total consumption figure for three phases at once, then you can simply divide this value by three.


    To restore the factory settings, you must use the Reset button. The Reset button is located near the top group of contacts. The Reset button has two functions:

    1. Reboot the device - briefly press the Reset button. After pressing the Reset button, the device will reboot and enter the wireless access point mode.

    2. Restoring factory settings - press and hold the Reset button for more than 5 seconds. After restoring factory settings, the device will reboot and enter wireless access point mode. Connect to your wireless network and configure the machine according to Chapter 3 “Connecting to a wireless network” and “Configuring settings”.

    Factory reset does not affect energy storage meters.

    The wireless access point mode will turn off automatically 15 minutes after the end of work with the WEB interface of the device.


    The device does not require periodic maintenance.

    A built-in CR 2032 3V battery is used to power the device clock. The battery installed in the device has a long service life - more than 10 years. Battery life is greatly influenced by the temperature conditions in which the device is used.

    In the event of a complete battery failure, the device will continue to operate with limited functionality.

    Replacing the battery is carried out in the following sequence:

    1. Disconnect the device from the power supply.

    2. Unscrew the 4 screws connecting the device body and remove the upper case.

    3. Remove the old battery from the holder.

    4. Observing the polarity, insert a new battery into the holder.

    5. Put on the upper part of the case and tighten the 4 screws.


    The device supports data transmission and dry contact output control using the Message Queue Telemetry Transport (MQTT) service.

    You can activate the MQTT service on the WEB interface of the device in the "MQTT Server" section.

    If the fields "Username" and "Password" are left blank, then the login to the server will be carried out without authorization.

    Only non-encrypted connection to the MQTT server is supported.

    Имя топика





    voltage, V



    amperage, A



    active power, W



    reverse * active power, rW


    watts * hour

    stored energy


    watts * hour

    reverse * accumulated energy


    kilowatts * hour

    stored energy


    kilowatts * hour

    reverse * accumulated energy



    Power factor


    °С / °F




    output state


    JSON format

    all data in JSON format

    The device periodically publishes data in the format <device number>. <Topic name> to the following topics:

    n - phase number (1-3)

    * options available in Extended device version

    To control the “dry contact” output, you must activate this feature on the device's WEB interface in the “MQTT Server” section. The output state is changed by publishing a control phrase to the

    <device number> .SETOUT topic.

    The service supports two control phrases for enabling and disabling the output. Control phrases up to 15 characters long can be changed on the device's WEB interface in the "MQTT Server" section. By default, the phrase to turn on the output "1" is the phrase to turn off the output "0". Relay control topics should be sent with the RETAIN flag.


    The function of checking the data for compliance with the specified conditions allows you to automate the operation of a controlled output or receive notifications.

    • In total, you can configure up to 6 conditions.

    • Conditions do not have the opposite effect, i.e. if the condition is met and the relay turns on, then the relay will not turn off for the same condition. To turn on/off a relay, you always need two conditions.

    • Conditions are checked from top to bottom, from 1st to 6th. The relay takes on the state according to the last fulfilled condition.

    • During the check of the switching conditions, the relay does not occur, i.e. the relay turns on or off only after all conditions have been checked.

    • Note: first, set the condition common to all others, for example, switch off the relay by condition, which is always fulfilled "1> 0"

    • To exclude false alarms, set the "Filter up to [sec]", the condition will be fulfilled only if the value is in the specified range for more than the specified number of seconds. Random spikes and fluctuations will be filtered out.

    • The condition check can be limited in time. If you activate a time interval, the condition will be executed only within the specified time.

    • Set the "Delay after [sec]" relay switching, during which the relay will not be switched regardless of the conditions. The minimum time is 60 seconds.


    Setting conditions is available on the device WEB interface in the "Conditions" section.


    To activate the condition, you must select the data type, select the comparison sign ">" or "<", enter the value for comparison, select the required action.

    Example: If it is necessary to turn off the relay when the voltage exceeds 260V and turn on the relay when the voltage returns to 250V, then two conditions must be enabled:

    1. V > 260 Relay OFF

    2. V < 250 Relay ON

    Hysteresis is set only for the action - sending an e-mail. The hysteresis is designed to prevent the sending of repeated e-mail messages when the value of the selected data continues to meet the specified condition.

    Important! Set the hysteresis value high enough to avoid spam. Example of hysteresis operation for condition: V> 260 e-mail

    Hysteresis: 20


    The event notification function allows you to activate the sending of e-mail messages about selected events occurring with the device.



    The scope of delivery must comply with the following table




    Energy monitor smart-MAIC 103



    Current transformers



    Main characteristics of the device and ranges of measured values

    Number of phases


    Single phase current measurement

    up to 100А /300А / 600А / 1000А / 1500А / 2000А

    Measurement error, active energy

    < 0.5%

    Measurement error, voltage and current

    < 1%

    Load on controlled relay

    up to 50W at 220V

    Power consumption

    < 1.2W

    Wireless communication protocol

    2.4 GHz / IEEE 802.11 (b, g, n)

    Data refresh interval

    5 sec

    Data collection interval

    1 minute

    Data accumulation in the absence of WiFi

    12 days

    Working temperature range

    from -40 °C to 70 °C

    Dimensions LxHxW

    (3 DIN modules)


The data obtained during the measurements are sent to the database on the «cloud server». Access to data is carried out using the smart-MAIC Dashboard service.

For data visualization and analysis it is necessary:

  1. Create your account on the «cloud server», for this, follow the link dash.smart-maic.com >>

    Follow the steps necessary for registration.

  2. In the «Devices» menu, select «Add Device» and enter the following data:

    • Device name - an arbitrary name for your device

    • Device ID - the ID of your device can be viewed on the device WEB interface in the “Status” tab

    • Device PIN - the PIN that you set on your device.

After connecting a new device, you will be asked to automatically create two pre-configured boards for displaying data on a PC and mobile device.

For more information about the Dashboard, see the Knowledge Base >>