MAXREFDES42#: IO-LINK RTD temperature sensor

Overview

MAXREFDES42# is a reference design for high-accuracy IO-Link® ^resistance temperature detector ( RTD ) temperature sensors for wide temperature range 2-, 3-, or 4-wire PT100 RTD applications. According to industrial specifications, the design uses Maxim Integrated's highly integrated MAX31865 RTD to digital output conversion chip. A rugged, board-mounted M12 female connector allows off-the-shelf RTDs to be connected to the circuit board via standard M12 extension cables. The temperature sensor's temperature conversion accuracy reaches 15-bit resolution and has multiple fault detection functions. The display shows the temperature value rounded to the nearest °C, while IO-Link communication tracks and provides precise temperature values. The sensor uses IQ2 Development’s IO-Link device stack to communicate with any host compatible with version 1.1 IO-Link. The reference design uses an industrial DC-DC step-down converter with minimal power consumption. The circuit board also has a male M12 connector for connection to the IO-Link master via a standard M12 cable. Connecting the MAXREFDES42# to a USB IO-link host, such as the IQ2 Development iqInterface ^® IO-Link host (using iqTool ^® software), allows evaluation using a PC.

For more information and laboratory measurement data, see the "Details" tab . Design files and firmware can be downloaded from the Design Resources tab .

characteristic

• EC 61131-9

• IQ ²  IO-Link ^iqStack® Devices

• Compatible with IO-Link version 1.1

• Non-volatile memory for saving calibration data

• Fault monitoring

• LED display for quick reading (approximate temperature value)

• IO-Link provides precise temperature values*

Competitive Advantage

• High precision

• Low power consumption

• low cost

*See laboratory measurement data.

application

• food processing

• chemical processing

• Textile manufacturing

• Air, gas and liquid temperature measurement