Data Collector With M-Bus And RS-485 Protocol Conversion Reference Design

(ACTIVE) TIDM-1005

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Key Document

Description

This reference design implements a smart meter data collector with protocol conversion between Meter Bus (M-Bus) and RS-485 networks. M-BUS and RS-485 networks can be mixed together in some network domains, requiring bridging capability to fully integrate the system. This design becomes an intermediate node that collects M-BUS data packets from individual flow meters and formats them for transmission across a larger RS-485 network to the primary data concentrator.

Features
  • Simple data collector with protocol conversion between M-Bus and RS-485 transceiver for cost-constrained applications
  • Isolated power supply output 24V to provide sufficient power for M-Bus master module to support more than 100 M-Bus slaves, 3.3V to power MSP432, and 5V to power RS-485 signal chain
  • Tested +/-2KV IEC61000-4-4 EFT, +/-8KV IEC61000-4-2 ESD, and CISPR22 Class-B conducted emission
  • The reference design EVM with extra pinouts (for SPI, UART, and GPIO) and the software examples allow ease of evaluation to support other wireless and wired communication protocols

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Design Guide

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Bill of Materials (BOM)

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TI Devices (10)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ISOW7841  High-Efficiency, Low-Emissions, Reinforced Digital Isolator With Integrated Power  Isolation  Sample & Buy View Design Kits & Evaluation Modules
MSP432P401R  SimpleLink Ultra-Low-Power 32-Bit ARM Cortex-M4F MCU With Precision ADC, 256KB Flash and 64KB RAM  SimpleLink MCUs  Sample & Buy View Design Kits & Evaluation Modules
SN65HVD3082E  Half-Duplex RS-485 Transceiver  Interface  Sample & Buy View Design Kits & Evaluation Modules
SN74LV1T34  Single Power Supply BUFFER Logic Level Shifter (no enable)  Voltage level translation  Sample & Buy View Design Kits & Evaluation Modules
THVD1500  5V RS-485 Transceivers up to 300kbps With ±8kV IEC ESD Protection  Interface  Sample & Buy Not Available
TMP102  1.4V-Capable Temperature Sensor with I2C/SMBus Interface and Alert Function in SOT-563  Temperature sensors  Sample & Buy View Design Kits & Evaluation Modules
TPS3808  Low Quiescent Current Supervisor with Programmable-Delay  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS62175  28V, 0.5A Step-Down Converter with SNOOZE Mode  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TPS62177  28V, 0.5A Step-Down Converter with SNOOZE Mode  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
UCC28711  Constant-Voltage, Constant-Current PWM Controller with Primary-Side Regulation  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ISOW7841 Download Download
MSP432P401R Download Download
NFBGA (ZXH)| 80 Download -
Download Download
SN65HVD3082E Download Download
Download Download
Download Download
SN74LV1T34 Download Download
Download Download
THVD1500 Download
TMP102 Download Download
TPS3808 Download Download
Download Download
TPS62175 Download Download
TPS62177 Download Download
UCC28711 Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 6871 21 Aug 2017 124
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 362 06 Jun 2017 2
ZIP 2163 06 Jun 2017 26
PDF 1074 06 Jun 2017 18
PDF 257 06 Jun 2017 13
PDF 107 06 Jun 2017 25
PDF 424 06 Jun 2017 153
Related Tools & Software

Software (1)



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