A compact Linux-based PLC combines Ethernet, wireless connectivity and industrial interfaces for automation and data-collection applications.
Luckfox has introduced the Lyra PLC, a compact industrial controller designed for automation, monitoring and data-collection applications. Built around Rockchip’s RK3506B processor, the DIN-rail-mountable unit combines Linux computing with interfaces for connecting industrial equipment, sensors and other controllers. It provides RS232, RS422/RS485 and CAN connections, along with GPIO and two relay outputs.
The Lyra PLC uses three Arm Cortex-A7 processor cores running at up to 1.2GHz, together with a separate Cortex-M0 core for real-time tasks. It includes 512MB of DDR3L memory and 8GB of eMMC storage. A 1.9-inch touchscreen with a 320 × 170-pixel resolution provides a local way to view information and interact with the controller. Two 10/100Mbps Ethernet ports provide wired networking, while 2.4GHz Wi-Fi 6 and Bluetooth 5.2 support wireless connections.
For industrial equipment, the controller provides RS232, RS422/RS485 and CAN interfaces through terminal blocks. Two built-in relays can switch loads rated up to 10A at 250V AC or 10A at 30V DC. The controller accepts 7V to 24V DC power, while USB-C can provide 5V input. An optional version supports IEEE 802.3af Power over Ethernet, allowing both power and network connectivity through a suitable Ethernet connection.
The controller runs Debian 12 with Linux 6.1 and can be managed through a web browser. The interface allows users to check system information, configure network settings, manage files and processes, and access a terminal. It also provides tools for configuring the PLC and communicating with connected industrial equipment.
The Lyra PLC supports software such as Node-RED and OpenPLC, allowing users to create automation workflows and PLC programmes. Its communication interfaces can also be used to connect Modbus devices and transfer data between different industrial communication systems. This makes the controller useful for applications such as equipment monitoring, data collection and protocol conversion.
Additional features include a USB 2.0 port, USB-C OTG, debug connections, I²C, GPIO, reset and user buttons, a real-time clock, and an onboard temperature and humidity sensor. The controller is designed for DIN-rail installation and measures approximately 87.80 × 71.84 × 60.50 mm.
The Luckfox Lyra PLC combines a Linux-based computing platform with the interfaces normally needed to connect industrial equipment. Its combination of wired and wireless networking, industrial communication ports and relay outputs provides a flexible platform for automation, monitoring and data-collection projects.
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