Maxim Integrated’s new MAXREFDES42# IO-Link resistance temperature detector (RTD) is an IO-Link reference design for industrial control and automation. This design’s highly integrated analog front end (AFE) measures temperature, while detecting overvoltage, shorts, and open circuits. The reference design consumes minimal power and provides better than +/-.5°C accuracy. The temperature appears immediately on an LED display for a quick and convenient snapshot of coarse temperature values. For user convenience, MAXREFDES42# fits in a standard industrial form factor. For versatility, it supports all three IO-Link speeds. The MAXREFDES42# is available for use with a 2-wire, 3-wire, or 4-wire PT100 RTD over a wide temperature range. Applications include air, gas, and liquid temperature measurement.
The configuration software for this smart IO-Link temperature detector was developed in collaboration with IQ2 Development. The MAXREFDES42# uses their IO-Link device stack to communicate with any IO-Link version 1.1-compliant master. This software control lowers operating cost because it enables fast setup, diagnosis, and event monitoring from a PC and without a trip to the installation site. Maintenance can be done at the PC and not on the floor.
Low Power: during operation over a temperature range of -40°C to 150°C, the system consumes less than 300mW of power by utilizing an industrial DC-DC step-down converter.
Highly Integrated: integrated into the front-end is the MAX31865 RTD-to-digital converter which provides flexibility, robustness, and optimal performance for an IO-Link platform.
Cost Savings: PC control with IQ2 software saves configuration and maintenance cost and increases uptime.
For information on other reference designs, please visit Maxim’s Reference Design Center: http://www.maximintegrated.
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