Broken Wire Detection Using An Optical Switch Reference Design

(ACTIVE) TIDA-01509

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Key Document

Description

This reference design shows a compact implentation of 16 isolated digital input channels using TI's ISO121x devices. The design is split into two groups of eight channels each. A broken wire detection can be excecuted using only one additional optical switch for each channel or two optical switches and one additional capacitor for each group. For this functionality no secondary side supply is needed, which gives a unique benefit to digital input modules using the ISO121x family.

Features
  • 16 digital input channels with up to ±60-V input voltage tolerance
  • Broken wire detection for with only one additional component
  • Works with primary supply only, no isolated power supply needed
  • LaunchPad™ header for quick and easy evaluation

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Design Files

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Bill of Materials (BOM)

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TI Devices (5)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ISO1211  Isolated 24-V to 60-V digital input Receiver for digital input modules  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO1212  Isolated 24-V to 60-V digital input receiver for digital input modules  Isolation  Sample & Buy View Design Kits & Evaluation Modules
SN74LV165A  Parallel-Load 8-Bit Shift Registers  Flip-flop/latch/register  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G04  Single Inverter  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
TVS3300  33V Flat-Clamp Surge Protection Device  Circuit protection  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ISO1211 Download Download
ISO1212 Download Download
SN74LV165A Download Download
Download Download
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SN74LVC1G04 Download -
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TVS3300 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 651 26 Jan 2018 0
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 597 26 Jan 2018 0
ZIP 1278 26 Jan 2018 0
PDF 1613 26 Jan 2018 0
PDF 360 26 Jan 2018 0
PDF 82 26 Jan 2018 0
PDF 854 26 Jan 2018 0

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