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© rob hill dreamstime.com Components | August 28, 2013

Industry’s simplify isolated digital inputs to an Industrial PLC

Designers now have a way to reduce power, system cost, and size for programmable logic controller (PLC) digital-input subsystems, with the Corona (MAXREFDES12#) reference design by Maxim Integrated Products, Inc.
This design reduces isolated channels and leverages analog integration for industrial control and automation applications.

One method of reducing the size of I/O solutions in PLCs is to reduce the number of digital channels that need to be isolated. Integrating three Maxim products including a transformer driver, the Corona design reduces isolated channels and eliminates the need for power-hungry optocouplers and discrete parts. These savings reduce power by 16%, solution size by 38%, and cost by 23%. Maxim’s devices used in Corona are designed specifically for harsh industrial environments with operating temperature ranges from -40°C to +125°C, so they are ideal for use in PLCs and other automation applications.

“The MAX31911 incorporated in Corona uses up to 80% less supply current compared to the competition,” said Tony Partow, Senior Business Manager at Maxim Integrated. “This demonstrates our expertise in analog integration, coupled with our state-of-the-art high-voltage semiconductor process technologies. Corona is one example of how our reference designs accelerate the design process, while also providing innovative solutions.”

“Reference designs are increasingly important as designers seek to develop sophisticated solutions and reduce development cycle times,” said Susie Inouye, Research Director and Founder of Databeans.

Availability and Pricing

- Complete reference design available in a 90 mm x 20 mm Pmod form factor.
- Pricing for Corona starts at $45 (FOB USA).
- Available through distribution channels today.

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