8-Channel Digital Input Module for Programmable Logic Controllers (PLC)
TIDA-00017
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Key Document
- 8-Channel Digital Input Module for Programmable Logic Controllers Design Guide (Rev. A)
(PDF 1983 KB)
27 Feb 2014
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)
See the Important Notice and Disclaimer covering reference designs and other TI resources.