The Keyence KV-XL402 is a high-performance serial communication expansion unit designed for the Keyence KV Series programmable logic controllers (PLCs). By supporting RS-422A and RS-485 communication standards across dual ports, the KV-XL402 offers engineers a reliable and versatile solution for connecting a wide range of industrial devices in modern automation systems.

At the heart of the KV-XL402 are its two RS-422A/RS-485 communication ports, each equipped with a detachable 5-pole European terminal block. This design not only ensures secure and vibration-resistant connections but also simplifies wiring, installation, and maintenance. Supporting both 4-wire full duplex and 2-wire half duplex modes, the unit provides flexibility for connecting devices with different wiring and communication requirements. This makes it suitable for multi-drop networks and long-distance communication, where RS-485 is widely used.

The KV-XL402 incorporates flexible refresh functions that optimise communication performance. Automatic refresh reduces programming effort by continuously updating data between devices, direct refresh allows for real-time communication with precise control, and inter-unit synchronization refresh ensures stable coordination across multiple modules in the system. Together, these functions enhance efficiency, scalability, and stability in diverse communication scenarios.

A major advantage of the KV-XL402 is its multi-protocol capability. It supports non-procedure communication, making it easy to exchange data with devices that do not rely on structured protocols. In addition, it is compatible with PROTOCOL STUDIO, Keyence’s intuitive tool for creating and managing custom communication protocols, enabling quick setup without advanced programming. The unit also supports Modbus slave functionality, a widely adopted standard in industrial automation, allowing seamless integration with Modbus-based devices such as sensors, drives, or HMIs.

Compact and durable, the KV-XL402 is built to integrate neatly into control panels while maintaining robust performance under continuous operation. Its design ensures that it can handle the demands of industrial environments, delivering reliable communication without compromising efficiency.

The KV-XL402 is particularly suited for industries such as manufacturing, logistics, automotive, and process control, where reliable serial communication with multiple external devices is essential. Whether integrating intelligent sensors, inverters, barcode systems, or other serial devices, the KV-XL402 provides a stable and flexible interface that enhances overall system connectivity.

In summary, the Keyence KV-XL402 Serial Communication Unit combines dual-port RS-422A/RS-485 support, secure European terminal block wiring, versatile refresh modes, and broad protocol compatibility to deliver a complete communication solution. Compact, powerful, and reliable, it enables engineers to expand the communication capabilities of their KV PLC systems with ease and confidence.