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  • New item   Modular three-phase energy meter | 100 A | 3×230/400 V | bidirectional | RS485 Modbus | MID | DIN | Eastron SDM72D-M-MID

    Modular three-phase energy meter | 100 A | 3×230/400 V | bidirectional | RS485 Modbus | MID | DIN | Eastron SDM72D-M-MID

    Code: SDM72D-M-MID
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    Direct-connected three-phase meter up to 100 A with RS485 Modbus RTU and MID B+D approval. It measures active energy imported from and exported to the grid separately and suits remote metering.

  • Product description

    Modular three-phase energy meter | 100 A | 3×230/400 V | bidirectional | RS485 Modbus | MID | DIN | Eastron SDM72D-M-MID

    The Eastron SDM72D-M-MID is a 4-module DIN meter for 3×230/400 V networks, connected directly up to 100 A. It measures active energy in both directions and transmits data via RS485 Modbus RTU.

    Key point:
    It is the simplest way to get MID-approved metering with Modbus without current transformers. One device provides accurate kWh readings and live values (V, A, W, PF, Hz) to a controller or inverter. Separate import and export registers make it usable wherever energy also flows back to the grid.
    Current
    10 (100) A
    Voltage
    3×230/400 V
    Interface
    RS485 Modbus RTU
    Certification
    MID B+D
    ⇄
    Bidirectional metering
    Yes. The meter records imported and exported active energy (kWh) separately: it measures energy imported from and exported to the grid. Compatibility with inverter power / export control must be confirmed separately – bidirectional metering alone is not enough.

    Communication interfaces and integration

    RS485 Modbus RTU
    Remote reading into SCADA, BMS, PLC, Home Assistant or a solar inverter export-limiting system (if the inverter supports this meter); up to 247 addresses on one line.
    Pulse output
    Default 1000 imp/kWh – energy pulses to a data logger, PLC counter input or an existing pulse collection system.

    Operating principle

    Mounted on a 35 mm DIN rail and connected directly into a 3P4W or 1P2W circuit – no current transformers, up to 100 A.

    The meter continuously measures voltage, current, power and power factor, and accumulates active energy in separate import and export registers.

    Readings are shown on the backlit LCD and transmitted via RS485 Modbus RTU and the pulse output – usable for billing and automation alike.

    Why choose the Eastron SDM72D-M-MID?
    It combines the three things most often needed in sub-metering: 100 A direct connection, MID B+D approval and a Modbus interface. There is no need to choose between an “accurate” and a “smart” meter.

    Technical specifications

    Product type Modular three-phase energy meter
    Manufacturer / model Eastron SDM72D-M-MID
    Connection Direct, up to 100 A
    Rated voltage 3×230/400 V AC (80–120 % Un)
    Current Ib (Imax) 10 (100) A; min. 0.5 A
    Starting current 40 mA (0.4% Ib)
    Frequency 50 Hz (MID version)
    Accuracy class Active energy: Class 1 (IEC 62053-21) / Class B (EN 50470-1/3)
    MID Yes, MID B+D (2014/32/EU)
    Tariffs 1
    Energy direction Import / export (bidirectional)
    Measured values kWh (import, export, total), W, V, A, PF, Hz
    Communication interface RS485 Modbus RTU, addresses 1–247 (default 9600 bps)
    Pulse output Yes, default 1000 imp/kWh
    Network systems 3P4W, 1P2W
    Display Backlit LCD, max. 999999.9 kWh
    Power consumption ≤ 2 W / 10 VA per phase
    Mounting / width DIN 35 mm, 4 modules (72 mm)
    Dimensions (W×H×D) 72 × 100 × 66 mm
    Protection degree IP51 (front, indoor)
    Operating temperature −25…+55 °C
    Standards IEC 62053-21, EN 50470-1, EN 50470-3, MID 2014/32/EU

    Main functions

    • Bidirectional metering – separate import and export kWh registers.
    • RS485 Modbus RTU – data to SCADA, BMS, PLC or inverter.
    • Pulse output – default 1000 imp/kWh for existing pulse systems.
    • Live values – V, A, W, PF and Hz per phase.
    • MID B+D – metering accuracy approved under 2014/32/EU.
    • Direct 100 A connection – no current transformers.

    How does it differ from similar models?

    Eastron SDM72D-MID Same SDM72 platform but without RS485 – pulse output and total kWh only; the SDM72D-M-MID adds Modbus and separate import/export registers.
    Eastron SDM630-MT Also 100 A, Modbus and MID, but multifunction (more parameters) with 4 tariffs; the SDM72D-M-MID is simpler and more affordable when tariffs are not needed.
    THORGEON 01007 RS485 Modbus and MID with 2 tariffs, but maximum current 80 A; the SDM72D-M-MID handles up to 100 A direct.
    Schneider Acti9 iEM3150 Modbus and MID, but direct connection up to 63 A; the SDM72D-M-MID has a higher 100 A rating.

    Where is it used?

    • Solar PV with export limitation (if the inverter supports the meter)
    • Tenant and unit sub-metering
    • EV charging points
    • Building management systems (BMS)
    • Consumption monitoring of production lines and machines
    • Heat pumps and boiler rooms
    • Home energy monitoring with Home Assistant

    Use by requirement

    For installers.
    One 4-module device up to 100 A, no CTs, with a standard Modbus interface.
    For property managers.
    MID-approved readings for splitting costs between tenants.
    For solar PV owners.
    Clear view of consumption and energy fed into the grid.

    Practical use

    If a commercial building has several rented units and bills must follow real consumption, install an SDM72D-M-MID for each unit and read all meters over one RS485 line into a central system – invoices are then based on MID-approved readings with no manual reading.

    Pros

    • Direct connection up to 100 A
    • MID B+D approval
    • RS485 Modbus RTU and pulse output
    • Separate import and export metering
    • Compact – 4 modules (72 mm)
    • Backlit LCD
    • Low self-consumption – ≤ 2 W / 10 VA per phase

    Cons / limitations

    • Single tariff only – for multi-tariff metering choose the Eastron SDM630-MT.
    • Not for currents above 100 A – then a CT meter is needed (e.g. Eastron SDM630MCT).
    • No wireless link – Wi-Fi requires a separate gateway or a Wi-Fi model (e.g. EL-TVPS3-80T).
    • Fewer parameters than the multifunction SDM630 (no THD, no demand).

    Safety and installation notes

    • Installation only by a qualified electrician with the power disconnected.
    • Fit suitable upstream protection (MCB or fuses) sized for the cable cross-section.
    • Follow the terminal markings: phase inputs/outputs and neutral must not be swapped.
    • Run the RS485 line in twisted-pair cable with 120 Ω termination resistors at both ends.
    • The IP51 housing is for indoor use – outdoors install only in a sealed enclosure.

    Quick selection guide

    100 A direct
    3×230/400 V
    RS485 Modbus RTU
    MID B+D
    Suitable when you need:
    • MID-approved metering with Modbus
    • Separate measurement of energy imported from and exported to the grid
    • Direct connection up to 100 A
    Check before use:
    • That the load does not exceed 100 A
    • That the controller/inverter supports Eastron SDM72 Modbus registers
    • That there are 4 free modules in the panel
    Important reminder: The meter measures and transmits data but does not protect the circuit – it does not replace an MCB, relay or voltage protection.

    FAQ

    Does the SDM72D-M-MID have MID?
    Yes, Eastron states MID B+D certification under 2014/32/EU.
    Does it measure energy exported to the grid?
    Yes, it counts imported and exported energy separately and has a Modbus interface; check compatibility with inverter export control separately.
    Are current transformers needed?
    No, it connects directly up to 100 A.
    Can it be used on a single-phase network?
    Yes, the manufacturer specifies a 1P2W wiring mode.
    How many tariffs does it have?
    One – for multi-tariff metering choose the SDM630-MT.
    What is the Modbus address range?
    The address is set from 1 to 247, default speed 9600 bps.

    Eastron SDM72D-M-MID – 100 A three-phase meter with Modbus and MID

    Three-phase 100 A DIN meter with RS485 Modbus RTU, MID B+D and bidirectional metering – for sub-metering and building automation.

    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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