Two-Phase Power Meter Reference Design


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Product Details

Block Diagram

Two Phase Meter

Two Phase Power Meter Reference Design Block Diagram

Supported Devices

Wireless Connectivity

Multiprotocol MCUs



Processors and Microcontrollers

KM Series Arm Cortex-M0+


  • 200 A current range (CL200, TA 30A)
  • 85 to 264 V, 50/60 Hz voltage range
  • Two types of installation: Form 2S or Form 12S
  • Accuracy class: ANSI C12.20-2002 Class 0.2
  • Line frequency measurement (for precision zero-cross detection)
  • Current transformer sensing circuit implementation for each phase
  • Low-power modes including the use of built-in RTC (Li-battery backup)
  • AMI expansion header supporting 2.4 GHz 802.15.4 or HAN/NAN (with 6loWPAN IPv6) communications for AMR and remote control
  • EMC proven design (ANSI C62.41, IEC 61000-4-4)
  • Peripherals
    • 8 x 20 segment LCD, including charge pump
    • LED pulse outputs (kWh, kVARh)
    • Isolated (4 kV) RS-232 port for monitoring, parameterization and firmware upgrade (optional)
    • Infrared optical port according to ANSI C12.18-2006 (optional)

Buy Options


Quick reference to our documentation types.

1-5 of 6 documents

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Design Resources

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Design Files

3 design files

  • Printed Circuit Boards and Schematics

    Two Phase Power Meter Bill of Materials

  • Printed Circuit Boards and Schematics

    KM34Z128 1P3W Power Meter Schematics

  • Printed Circuit Boards and Schematics

    Two Phase Power Meter Design Files


1 software file

  • Debugging and Visualization Tools

    FreeMASTER tool 2.5 – Installer

Note: For better experience, software downloads are recommended on desktop.


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