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  • New item   Modular three-phase multifunction energy meter | 100 A | 3×230/400 V | 2 tariffs | RS485 Modbus | MID | DIN | VEXEN ESM3100DM2T

    Modular three-phase multifunction energy meter | 100 A | 3×230/400 V | 2 tariffs | RS485 Modbus | MID | DIN | VEXEN ESM3100DM2T

    Code: ESM3100DM2T
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    A three-phase multifunction meter for direct connection up to 100 A with RS485 Modbus RTU interface, 2 tariffs by power source and MID certificate. Besides energy it shows voltage, current, power, power factor and THD.

  • Product description

    Modular three-phase multifunction energy meter | 100 A | 3×230/400 V | 2 tariffs | RS485 Modbus | MID | DIN | VEXEN ESM3100DM2T

    The VEXEN ESM3100DM2T is a modular three-phase multifunction energy meter for direct connection in 3×230/400 V networks up to 100 A with RS485 Modbus RTU interface and 2 tariffs. It is designed for metering and network parameter monitoring in boards where data must be passed to a control or monitoring system.

    Key point:
    In addition to kWh and kVArh the meter shows voltage, current, power, power factor, frequency and THD, so one device replaces both a meter and a simple network analyser. It is MID certified (EU-type examination certificate 0120/SGS0448). The two tariffs switch automatically according to the power source – e.g. when the grid fails and a generator starts, energy is counted in tariff 2.
    Max. current
    100 A
    Interface
    Modbus RTU
    Tariffs
    2 (dual source)
    Certificate
    MID
    ℹ
    Bidirectional metering
    The manufacturer's documentation lists the measured values as kWh / kVArh, but separate import and export (consumed and delivered) energy registers are not explicitly named. If energy exported to the grid must be measured separately, confirm the register list before ordering; the confirmed import / export meter in this line is the ESM3100DM.

    Communication interfaces and integration

    RS485 Modbus RTU
    Remote reading of energy and network parameters into SCADA, BMS, PLC or a data logger; via a Modbus gateway also into Home Assistant. Baud rate 2400–38400 bps, addresses 001–247.
    2 pulse outputs
    Passive outputs for active and reactive energy – for pulse counters, PLCs or data loggers without a digital bus.
    For M-Bus systems
    The manufacturer designates this model as the Modbus version; for M-Bus integration choose the ESM3100DMB2T.

    Operating principle

    The meter is mounted on a 35 mm DIN rail and the phase conductors are connected directly (power terminals 4–25 mm²) – no current transformers are needed up to 100 A.

    The electronic circuit measures the voltage and current of all phases and calculates power, energy and quality values; tariff 1 or 2 is selected automatically according to the power source.

    Data are shown on the display and transmitted over RS485 Modbus RTU, while active and reactive energy pulses are sent via two passive pulse outputs.

    Why choose the VEXEN ESM3100DM2T?
    With one device you get MID energy metering plus remote visibility of load, phase voltages or THD. Modbus RTU is supported by virtually every PLC, SCADA and BMS. Dual-source tariffs separate grid and generator energy without extra automation.

    Technical specifications

    Product type Modular three-phase multifunction energy meter
    Manufacturer / model VEXEN ESM3100DM2T
    Connection Direct, up to 100 A
    Rated voltage 3×230/400 V AC
    Operating voltage range 80–120 % Un
    Basic current (Ib) 10 A
    Maximum current (Imax) 100 A
    Minimum current (Imin) 0.5 A
    Starting current / operating range 0.4 % Ib
    MID Yes (EU-type examination cert. 0120/SGS0448)
    Tariffs 2 – automatic switching by power source (grid / generator)
    Measured values Active and reactive energy (kWh, kVArh), active, reactive and apparent power (kW, kVAr, kVA), voltage, current, frequency, power factor, demand, THD
    Communication interface RS485 Modbus RTU
    Communication settings Modbus RTU: 2400–38400 bps, address 001–247
    Pulse output 2 passive (active and reactive energy), configurable constant and width
    Terminals Power 4–25 mm² (2.5 Nm); auxiliary 0.5–1.5 mm² (0.2 Nm)
    Power consumption ≤ 2 W / 10 VA (voltage circuit); ≤ 4 VA (current circuit)
    Mounting 35 mm DIN rail
    Standards 2014/32/EU (MID), EN 50470-1, EN 50470-3

    Main functions

    • RS485 Modbus RTU interface – remote reading of registers and parameters.
    • MID certificate – to EN 50470-1/-3, suitable for billing between parties.
    • Multifunction measurements – V, A, kW, kVAr, kVA, PF, Hz, THD and demand.
    • Direct connection up to 100 A – no current transformers.
    • 2 tariffs by power source – grid and generator counted separately.
    • 2 passive pulse outputs – for active and reactive energy, configurable constant.

    How does it differ from similar models?

    VEXEN ESM3100DMB2T Same multifunction platform and 2 tariffs, but with M-Bus instead of Modbus RTU.
    VEXEN ESM3100DM Modbus RTU and confirmed import / export metering, but 1 tariff and only kWh / W – no V, A, PF, THD.
    Eastron SDM630-MT 100 A, 4 tariffs, RS485 Modbus, MID, IP51; the ESM3100DM2T has 2 tariffs by power source.
    THORGEON 01007 80 A, 2 tariffs, Modbus, MID; the ESM3100DM2T has a 100 A limit and multifunction measurements (THD, PF).

    Where is it used?

    • Remote metering in commercial buildings and offices
    • Sub-metering of apartment blocks and rented premises
    • Building management systems (BMS)
    • Production halls and equipment energy monitoring
    • Sites with a standby generator
    • EV charging infrastructure
    • Energy audits and load analysis
    • Server rooms and technical rooms

    Use by need

    Facility managers.
    Readings go automatically to the BMS or SCADA without manual reading.
    Electricians and integrators.
    Direct 100 A connection and a standard protocol – fewer components in the board.
    Energy managers.
    Voltage, current, PF and THD help find overloaded phases and quality issues.

    Practical application

    If a site has a standby generator and you need to know separately how much energy came from the grid and how much from the generator, the VEXEN ESM3100DM2T is installed in the common feeder: when the grid fails the meter switches to tariff 2 automatically, and both registers are read over RS485 Modbus RTU.

    Pros

    • MID certificate (EN 50470-1/-3)
    • RS485 Modbus RTU interface
    • Multifunction measurements including THD
    • Direct connection up to 100 A
    • 2 tariffs by power source
    • 2 pulse outputs

    Cons / limitations

    • This is the Modbus version, M-Bus is not specified – for M-Bus systems choose the ESM3100DMB2T
    • Tariffs switch only by power source, not by time
    • Separate import / export registers are not named in the manufacturer's documentation – separate import / export metering is confirmed for the ESM3100DM
    • Currents above 100 A require a CT meter (ES3100DCT)

    Safety and installation notes

    • Installation and wiring must be done by a qualified electrician with the circuit isolated and verified dead.
    • Install an upstream protective device (MCB or fuses) sized to the cable cross-section and load – the meter is not a protective device.
    • Follow the phase and neutral wiring diagram in the manufacturer's manual; swapped inputs and outputs distort the readings.
    • Tighten the power terminals to the specified torque – a loose contact at 100 A overheats and can damage the meter.
    • Do not break the seals or open the front cover – this affects the measurement and, according to the manufacturer's manual, voids the warranty.

    Quick selection guide

    100 A direct
    Modbus RTU
    2 tariffs
    MID
    Suitable when you need:
    • Modbus RTU integration into SCADA / BMS
    • separate grid and generator metering
    • MID metering up to 100 A
    Check before use:
    • that the circuit current does not exceed 100 A
    • that the Modbus baud rate and address match
    • how the second power source will be connected
    Important reminder: The meter measures and transmits data but performs no protective functions and does not replace the grid operator's billing meter without the operator's consent. Tariff switching depends on the power source, not on the time of day.

    FAQ

    What interface does the ESM3100DM2T have?
    RS485 Modbus RTU, 2400–38400 bps, address 001–247.
    Is the meter MID certified?
    Yes, EU-type examination certificate 0120/SGS0448, EN 50470-1/-3.
    What is the maximum current?
    Direct connection up to 100 A, basic current 10 A.
    How do the 2 tariffs work?
    When the grid fails and a generator starts, the meter automatically counts in tariff 2.
    Does it measure energy exported to the grid?
    Separate import / export registers are not named – we recommend the ESM3100DM or confirming the registers.
    What wire sizes fit?
    Power terminals 4–25 mm² (2.5 Nm), auxiliary 0.5–1.5 mm² (0.2 Nm).

    VEXEN ESM3100DM2T – multifunction Modbus MID meter 100 A

    The VEXEN ESM3100DM2T is a three-phase multifunction 100 A meter with RS485 Modbus RTU, 2 tariffs by power source and MID certificate, measuring energy, power, voltage, current, PF and THD.

    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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