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TIDM-METROLOGY-HOST
Single-Phase Electric Meter with Isolated Energy Measurement
TIDM-METROLOGY-HOST
Overview
Electric meter developers often prefer to separate the energy measurement function from the host processor functions such as ANSI/IEC data tables, DLMS/COSEM, tariff management, and communications. This design demonstrates a method for keeping these meter functions separated by using an individual metrology processor and host processor. The firmware supplied with the design manages all of the required functions and synchronization between the processors. The design also demonstrates how to isolate communications between the two processors to achieve the necessary safety requirements. Finally, this design demonstrates a method for meter calibration using the USB interface on an MSP430 MCU. Engineers will be able to more quickly develop smart meters with isolated metrology functions by reusing this reference design.
Features
- Simplified meter calibration by using USB connection
- Isolated communications between metrology AFE and host MCU
- TI Energy Library for metrology calculates all energy measurement parameters
- Host MCU application controls on-board LCD and meter calibration
- Single-phase energy measurement achieves Class 0.2 accuracy
- Segment LCD on board
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDU455A.PDF (5621 K)
Reference design overview and verified performance test data
TIDRAI6.PDF (120 K)
Detailed schematic diagram for design layout and components
TIDRAI7.PDF (100 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRAI8.ZIP (299 K)
Files used for 3D models or 2D drawings of IC components
TIDC622.ZIP (212 K)
Design file that contains information on physical board layer of design PCB
TIDRAI9.ZIP (452 K)
PCB layer plot file used for generating PCB design layout
Products
Includes TI products in the design and potential alternatives.
Digital isolators
ISO7420 — Dual-channel, 2/0, 1-Mbps digital isolator
Data sheetDigital isolators
ISO7421 — Dual-channel, 1/1, 1-Mbps digital isolator
Data sheetLinear & low-dropout (LDO) regulators
TPS770 — 50-mA, 10-V, low-IQ, low-dropout voltage regulator
Data sheetMSP430 microcontrollers
MSP430AFE253 — 12 MHz metering AFE with 3 24-bit Sigma-Delta ADCs, 16KB Flash, 512B RAM
Data sheetMSP430 microcontrollers
MSP430F6638 — 20 MHz MCU with 256KB Flash, 16KB SRAM, 12-bit ADC, 12-bit DAC, comparator, DMA, 160 seg LCD, USB
Data sheetOther wireless technologies
CC2530-RF4CE — Zigbee, IEEE 802.15.4 and RF4CE wireless MCU with 256kB Flash and 8kB RAM
Data sheetZigbee products
CC2530 — Zigbee and IEEE 802.15.4 wireless MCU with 256kB Flash and 8kB RAM
Data sheetStart development
Technical documentation
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| Type | Title | Date | |
|---|---|---|---|
| * | Design guide | Single-Phase Electric Meter with Isolated Energy Measurement Design Guide (Rev. A) | Jan. 13, 2016 |
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