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Schneider Electric IEM3XXX Series

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Schneider Electric - IEM3250

Introduction​

The iEM3200 series consists of compact, DIN-rail mounted energy meters designed for accurate and certified measurement of electrical energy in single-phase and three-phase systems. These meters are MID-compliant, making them suitable for both fiscal metering and cost allocation applications in residential, commercial, and light industrial installations.

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This energy meter requires the use of an external sensor, such as a current transformer (CT), to measure current. The sensor must be selected based on the expected load and system configuration.

Power Installation​

Example of Installation: Schneider Electric Energy Analyzer IEM3250​

Schneider Electric Energy Analyzer IEM3250
Pin V1L1
Pin V2L2
Pin V3L3
Pin VnN
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In this case, it is also possible to connect the energy analyzer in single-phase mode, by wiring the neutral (N) to the Vn terminal and the phase (L) to terminal V1.

Sensor Installation​

Example of Installation: Carlo Gavazzi AC Current Transformer CTD-1X 100 5A XXX​

Electric Energy Analyzer IEM3250Carlo Gavazzi AC Current Transformer CTD-1X 100 5A XXX
Pin S1S1 (K)
Pin S2S2 (L)

Connection Diagram (IEM3250)​

Connection Diagram (IEM3250)

Modbus Communication​

Example of Modbus Communication Installation: Schneider Electric Energy Analyzer IEM3250​

Schneider Electric Energy Analyzer IEM3250CHESTER Modbus
Pin D0/-Pin 6 (A−)
Pin D1/+Pin 7 (B+)
Pin 0VPin 1 (GND)

Modbus communication (IEM3250)​

Modbus communication (IEM3250)

Browsing and Configuration​

  • ▼ Arrow button

    1. Navigation through the menu
    2. Increasing/Decreasing the value

  • OK Select / Enter / Menu button

  • ESC Escape button

Modbus Communication and CT Ratio Configuration​

  1. Press and hold the OK and ESC buttons until the password prompt appears.
  2. Enter the password using the ▼ (Arrow button) button. (Default password for new meters is 0010.)
  3. After entering the correct password, the configuration menu will appear.
  4. Use the ▼ (Arrow button) button to navigate to the menu item: Communication – Change?.
  5. Press the OK button to enter communication settings.
  6. Configure the following parameters as needed:
    • Address
    • Baud Rate
    • Parity
    • Stop Bit • Stop Bit
  7. Continue using the ▼ (Arrow button) button to scroll to the end of the menu.
  8. At the Exit Config option, press the OK button to confirm and save the settings.

Default Modbus Communication Configuration​

AddressBaud RateParityStop Bit
19.6kNone1

Example of CT Ratio Selection​

Carlo Gavazzi AC Current Transformer CTD-1X 100 5A XXX

ModelCT Ratio
CTD-1X 100 5A XXX20 (100:5 → 20)
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The CT ratio is selected based on the maximum expected primary current. For example, if the system's maximum current is around 100 A, a 100:5 CT (20 CT) is chosen to step this down to 5 A for measurement devices.