Pinetek Networks has developed the IOL Core4, a compact IO-Link-compatible master module for embedded systems. It connects up to four industrial sensors or actuators over IEC 61131-9 SDCI and is intended for integration into custom control, monitoring and IIoT hardware.

The module uses two Analog Devices MAX14819 dual IO-Link master transceivers. The standard PT-1204 version relies on the host system to run the IO-Link master stack, while the microcontroller-equipped PT-1205 variant runs the stack locally on the module. Pinetek currently refers to the latter publicly as the IOL Core4 Pro.

 IOL Core4 block diagram

The  host interface provides 24V power, 3.3V logic, SPI, interrupt and chip-select signals through a 2.54mm header. A second header carries the four IO-Link ports with L+, DIA and CQ signals. Each port supports Class A devices, with up to 500mA available on L+ and 150mA on CQ.

The module operates from a 24V supply with ±20% tolerance, while the host side uses 3.3V logic. Pinetek specifies a maximum 24V supply current of 2A through the host connector.

 IOL Core4 pro block diagram

For evaluation, Pinetek offers a Raspberry Pi kit with the standard PT-1204 module, a carrier board, 24V power supply and sensor cables. The carrier connects through the Raspberry Pi 40-pin GPIO header and can optionally power the Raspberry Pi itself. Raspberry Pi 4 and 5 are listed as supported hosts.

IOL Core4 software and host integration architecture

Pinetek’s software includes the IOL Master Application, with open-source C and Python examples available through GitHub.

User applications communicate with the master process over TCP, while the optional IOL Connect Manager adds IODD management, Node-RED integration, a JSON API, web-based configuration and SQLite support.

IOL Core 4 Evaluation Kit

The IOL Core4 measures 60 × 45mm with a height of about 15mm and supports M3 standoffs. Its specified operating temperature range is -25°C to 60°C, although Pinetek notes that the final rating depends on the completed host-system design.

The module is compatible with IO-Link devices but is not itself certified as an IO-Link master. Pinetek describes it as a component for integration into larger systems rather than as a standalone product.

Further Information

The IOL Core4 Evaluation Kit is available from Pinetek Networks for €270 excluding VAT and shipping. The kit includes the standard PT-1204 module, while pricing and availability for standalone production modules can be requested directly from the company.