Mitsubishi LJ71C24 - PLC Network Communication Module

The Mitsubishi LJ71C24 PLC is a robust RS-232 and RS-422/485 communication module developed for MELSEC-L Series controllers, delivering consistent and interference-resistant performance in demanding environments. Measuring 28.5 mm in width, 118 mm in depth, and 90 mm in height, it offers a compact design that saves panel space while providing solid connectivity options. Weighing 0.17 kg, it is light enough for easy installation but built with the durability needed for 24/7 industrial operation.

Engineered for reliable multi-protocol communication, the LJ71C24 supports point-to-point and multi-drop networking, making it ideal for connecting PLCs to HMIs, drives, sensors, and other intelligent devices. Its RS-232 interface is perfect for short-distance, high-speed communication, while RS-422/485 enables long-distance, noise-resistant data transfer in electrically harsh conditions. As part of the Mitsubishi PLC ecosystem, it offers seamless compatibility with GX Works programming software, reducing setup time, simplifying configuration, and ensuring stable long-term operation. This combination of flexibility, integration, and reliability makes it a trusted choice for industrial automation projects worldwide.

The Mitsubishi PLC LJ71C24 is widely used in industries where secure and dependable communication is vital. In manufacturing plants, it links PLCs to operator terminals and inverters for synchronized process control. In process industries, it connects field devices such as flow meters, analyzers, and controllers to central control systems for accurate data acquisition and monitoring. In building automation, it facilitates integration with HVAC systems, lighting controls, and energy meters for efficient facility management.

Maintenance engineers value the LJ71C24 for its straightforward wiring, robust performance, and compatibility with both short- and long-distance communication needs. Engineering students and trainees find it an excellent platform for learning RS-232 and RS-422/485 networking in practical automation environments. Whether deployed in production monitoring, process optimization, or building management systems, the Mitsubishi PLC LJ71C24 delivers the speed, stability, and flexibility required for modern industrial communication.