Intelligent IO links boost Industry 4.0

Intelligent IO links boost Industry 4.0

New Products |
By Nick Flaherty

Maxim Integrated Products has launched a reference design to provide flexibility with faster reconfiguration of IO to reduce factory downtime.

The MAXREFDES177 IO-Link reference design demonstrates the flexibility of the MAX22515 IO-Link transceiver, configuring all modes of the MAX22000 software-configurable analogue IO.

This builds upon the benefits of IO-Link’s two-way universal interface for sensors, actuator or IO expansion module to be interchangeable to a standard hardware interface. It also provides software-defined performance parameters and selectable analogue input or output performance modes.

Industry 4.0 is also moving to using the existing 4-20mA lines for sensors and actuators with single pair Ethernet (SPE) connections.

“We believes SPE and IO-link can coexist,” said Sui,  “Between the IOLink hub and the PLC is Ethernet so we see that to be a cost effective way to use both technologies, just like in computing here are places for Ethernet and there are places for USB, each have their own application.”

“For sensors in particular IOLink has a major advantage by using standard connectors and cable so you can upgrade to an IOLink sensor without recabling the factory which is a major expense.

“For the last metre to the sensor, IOLink has an advantage from that point of view. With SPE you still have to do a bit more work on parameterising the sensors, which can be overcome with software but IOLink is designed for that for the start.”

“IOLink can only go 20m and the 4-20mA wires can go kilometres so usually it is more the digital IO while IOLink is for the analogue.”

The software-configurable analogue IO in the MAX22000 cuts the power by half, integrating a 24-bit ADC analogue input mode and an 18-bit DAC analogue output mode, as well as operations over either a single 2-wire interface or a 4-wire resistance temperature detector (RTD)/thermocouple temperature measurement.

The MAX22515 is the industry’s smallest ±1.2kV/500Ω surge-protected, single-channel IO-Link transceiver. It features high integration with protection diodes, auxiliary digital input, I²C or pin control, integrated oscillator and selectable 3.3V or 5V LDO which help to provide high configurability and reduce SKU.

This provides half the power dissipation due to low 2.2Ω or 2.65Ω (typ) C/Q driver on-resistance compared to the closest competitor, in the smallest 2.5mm x 2.0mm WLP package. It cuts the solution size up to 67 percent compared to the closest competitor and fits into small, space-constrained IO-Link sensors or actuators. Software-configurable IOs and the ability to adjust device parameters on-the-fly allows dynamic optimisation of machine performance and reduced factory downtime.

The MAX22515 provides the smallest IO-Link single channel footprint at 5mm² while the MAX22000 footprint is 86mm².

The MAX22515AWP+ and MAX22515AWP+T are available at Maxim Integrated’s website for $1.45 (1000-up, FOB USA). The MAXREFDES177 reference design is available at the website for $65 and the MAX22000EVKIT evaluation kit is available at Maxim Integrated’s website for $135

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