IO-Link temperature sensor is more cost efficient than discrete alternatives
The new IO-Link resistance temperature detector with the type designation MAXREFDES42# completes Maxim’s portfolio of IO reference designs for industrial automation and control environments. The highly integrated analog front end of this design enables temperature measurements and detects overvoltages, shorts, and open circuits. In this respect, it offers higher functionality than competing discrete solutions, the vendor claims. Besides very low power consumption the reference design features a high accuracy of better than ±0.5 K. The temperature measured is indicated immediately on the built-in LED display for quick-and-dirty overview measurements.
To maximise application flexibility the reference design supports all three data rates specified for IO-Link, a unique feature in this market environment. The MAXREFDES42# can be used with platinum measurement resistors (Pt-RTDs) such as Pt-100, Pt-500 and Pt-1000 with two-, three- and four-line connection across a wide temperature range. Application examples include temperature measurements in air, gases and liquids.
The configuration software for this intelligent IO-Link temperature sensor has been developed in collaboration with IQ2 Development. In the reference design, the IO-Link Device Stack of IQ2 Development is utilised, enabling data exchange with any IO-Link 1.1 compatible master. The software-controlled approach of the design reduces operating costs since setup, diagnosis and event monitoring do not need to be carried out directly at the location of the installation but can be performed on a remote PC.
The reference design operates at ambient temperatures between -40°C to +150°C; thanks to an industrial-grade DC/DC step-down converter the system boasts a power consumption of less than 300 mW. Integrated into the front end is the MAX31865 RTD Digital/ analog converter for maximum flexibility, robustness and performance.
For more information visit https://www.maximintegrated.com/en/design/reference-design-center/
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