8-Channel Digital Input Module for Programmable Logic Controllers (PLC)
TIDA-00017
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Key Document

Description

This TI Design provides a complete 8-channel digital input module front-end reference design for Programmable Logic Controllers (PLCs). It is designed and fully tested to meet IEC61000-4 EMC and surge requirements for industrial automation systems thus reducing the time to market for customer. The design serializes 8 digital inputs, up to 34-volts each, minimizing the number of isolation channels and GPIO pins required of the host interface. Serialized data and control signals are galvanically isolated from the PLC using TI’s high-speed, 4242-volt peak, digital isolator technology. The design also includes an over-current protected, isolated power supply providing all necessary module voltages. Full documentation, test results, design files and necessary firmware are also available for this design.

Features
  • Fully tested to comply with IEC61000-4 for ESD, EFT and Surge
  • Input protection circuitry and integrated 15kV ESD protection
  • User-programmable current limit of 2mA on inputs for overcurrent protection
  • Galvanic isolation on data and SPI data up to 4242-volts peak
  • Integrated over-temperature indicator to disconnect inputs when fault conditions occur
  • Slim form factor 95 x 50x 10mm (LxWxH)

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Schematic/Block Diagram

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Test Data

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Design Files

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TI Devices (7)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD18537NQ5A  60V, N ch NexFET MOSFETâ„¢, single SON5x6, 13mOhm  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
ISO7131CC  Triple-channel, 2/1, 50-Mbps digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7141CC  Quad-channel, 3/1, 50-Mbps digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LM5017  7.5-100V Wide Vin, 600mA Constant On-Time Synchronous Buck Regulator  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
LM5069  9-V to 80-V hot swap controller with power limiting  Power switches  Sample & Buy View Design Kits & Evaluation Modules
SN65HVS885  34-V, 8-channel digital-input serializer for 5-V systems  Interface  Sample & Buy View Design Kits & Evaluation Modules
TPS715  50-mA, 24-V, ultra-low-IQ, low-dropout voltage regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18537NQ5A VSONP (DQJ)| 8 Download
ISO7131CC Download Download
ISO7141CC Download Download
LM5017 Download Download
Download Download
LM5069 Download Download
SN65HVS885 Download -
TPS715 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 1983 27 Feb 2014
Design files (4)
Title Type Size (KB) Date
ZIP 1361 04 Mar 2014
PDF 67 04 Mar 2014
ZIP 508 21 Jan 2014
PDF 292 21 Jan 2014
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