Overview

One Phase Power Meter Reference Design

Specifications

Single Phase Meter Block Diagram

Single Phase Meter Block DiagramMicrocontrollers (MCUs)Microcontrollers (MCUs)SensorSensorConnectivityConnectivity
  • KM3x :  50–75 MHz Precision Metrology MCUs with Segment LCDs based on Arm® Cortex®-M0+
  • MMA8491Q :  ±8g, Low g, Digital NXP® Accelerometer
  • KW2xD :  Kinetis® KW2xD-2.4 GHz 802.15.4 Wireless Radio Microcontroller (MCU) based on Arm® Cortex®-M4 Core

Technical and Functional Specifications

  • MKM34Z256 MCU built on the Arm Cortex-M0+ core with MMAU support
  • 5 to 80 A current range
  • 85 to 264 V, 50/60Hz voltage range
  • Low-power modes including the use of built-in RTC (Li-battery backup)
  • 8 x 16 segment LCD, including charge pump (values shown on LCD: V, A, W, VAr, VA, kWh, kVArh, cos φ, Hz, THD, time, date)
  • Isolated (4 kV) RS-232 port for monitoring, parameterization, and firmware upgrade
  • IEC 1107 infrared hardware interface
  • RF connector supporting sub GHz or 2.4 GHz 802.15.4 communications for Arm and remote control (KW0x or KW2x wireless MC
  • LED pulse outputs (kWh, kVArh)
  • Single built-in mechanical button as control interface
  • Low-power, 3-axis Xtrinsic tilt sensor for electronic tamper detection (optional)
  • Four-quadrant energy measurement (import/export)
  • Line frequency measurement (for precision zero-cross detection)
  • EMC proven design (EN61000-4-2, EN610004-4)
  • Cost-effective bill of materials (BOM)
  • Cost-effective shunt-resistor sensing circuit implementation
  • Accuracy class C (for active and reactive energy EN50470-3)

Buy

  • TWR-KM34Z75M   Active

  • Tower System Development Board for Kinetis KM14, KM33 and KM34 (50 MHz) MCUs

  • Kit contains:

    • TWR-KM34Z75M Tower System module
    • Quick Start Guide
    • USB Cable
    • TWR-KM34Z75M
    • 1 @ US
    • $160.00
    • Use Coupon
    • Distributor

    Don't have an NXP coupon? You can purchase this product from one of our authorized distributors.

1579109330588723448640

Design Resources

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