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PSoC®- based Digital Panel Meter (DPM) Solution - From Triveni Electronics | Cypress Semiconductor

PSoC®- based Digital Panel Meter (DPM) Solution - From Triveni Electronics

Last Updated: 
Sep 18, 2018

Triveni Electronics Logo

FEATURES

  • MEASURES TRUE RMS VOLTAGE /CURRENT
  • SINGLE-CHIP SOLUTION
  • AUTO-ZEROING ON POWER-UP THAT SAVES TIME DURING CALIBRATION
  • OPERATES FROM SINGLE POWER SUPPLY ( 5 V DC)
  • SMALL FORM FACTOR
  • OPTIONAL FEATURES
    • Can be customized for DC voltage /current measurement
    • MODBUS interface
    • 4-20 mA current output
    • PC GUI software for calibration

Description

The Digital Panel Meter (DPM) based on Cypress’s PSoC® programmable system-on-chip is a quick, cost-effective, programmable solution that addresses the needs of the digital panel meter market. The solution measures true RMS voltage or current with an accuracy of up to 0.3 percent over the entire input range.

The analog integration in PSoC makes it a single-chip solution and eliminates the need for external components that are required for signal conditioning. The auto-zeroing feature on power-up saves time during calibration. The measured true RMS voltage or current is displayed in a four-digit seven segment display. There are user keys to set parameters such as voltage (or current) range and Current Transformer (CT) ratio.The solution can be customized for DC voltage / current measurement.  Optional features include MODBUS, 4-20 mA output, and GUI for software calibration.

Based on PSoC 1 (CY8C24423A), it is available in a small form factor and is easily customizable. It is designed and developed by Triveni Electronics, one of Cypress’s premier design partners in India.

SPECIFICATIONS

Auxiliary supply: 230V AC , / - 10 %
Measuring voltage: 1V to 350V (0.1V resolution)
Measuring current: 50mA to 5.0 A (1mA resolution)
Measurement accuracy: 0.3 % True RMS
Operating frequency: 45 to 62 Hz
Display: 4-digit Seven Segment Display
User keys: 2 Nos. to set the parameters

Board Image with Timer

PSoC 1 CY8C24423A Diagram

PSoC Value

PSoC ADVANTAGES

  • 11-bit Delta sigma ADC for voltage or current measurement
  • On-Chip Programmable Gain Amplifier (PGA) for signal conditioning
  • On-Chip voltage reference

Video

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