TIDA-00333

Dual Isolated Half-Duplex RS-485 Repeater Reference Design

TIDA-00333

Design files

Overview

This reference design demonstrates a dual isolated, half-duplex repeater with data rate independent flow-control for long-haul RS-485 networks suitable for industrial applications. The design provides transient protection protecting the signal path against ESD, EFT, and surge transients specified in the IEC 61000 family of transient immunity standards.

Features
  • Data rate up to 100kbps    
  • Data rate independent flow control    
  • 4kV peak isolation    
  • IEC 61000-4-2 up to 16kV    
  • IEC 61000-4-4 up to 4kV    
  • IEC 61000-4-5 up to 1kV

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU590.PDF (570 K)

Reference design overview and verified performance test data

TIDC745.ZIP (301 K)

Detailed schematic diagram for design layout and components

TIDRBN8.PDF (201 K)

Detailed schematic diagram for design layout and components

TIDRBN9.PDF (103 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

Products

Includes TI products in the design and potential alternatives.

Isolated RS-485 transceivers

ISO3082200-Kbps, half-duplex, 2.5-kVrms isolated RS-485 & RS-422 transceiver

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS763150-mA, 10-V, low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Transformer drivers

SN6501Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
Technical article RS-485 basics: Introduction Apr. 28, 2015
Design guide Dual Isolated Half-Duplex RS-485 Repeater Design Guide (TIDA-00333) Oct. 10, 2014

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