Key benefits Provides robust RS485 communication with lightning protection and antiinterference design, delivering EMC and EMI performance for challenging environments. Suitable for outdoor longdistance transmission when the module is grounded to earth. Easy integration with standard 2.54 mm pitch pin headers, supporting quick secondary development. Enables reliable bus termination with a 120 ohm resistor; R0 shorting selects the termination option, which is recommended for longdistance networks. Supports multidevice networks with at least 40 nodes on the same RS485 network. Main features RS485 bus protection and EMI suppression for stable data transmission in harsh environments. Outdoorready grounding option: connect the earth terminal to ground for longdistance applications. Standard 2.54 mm spacing pin header for convenient development and wiring. 120 ohm termination resistor included; termination is enabled by shorting R0. Network scalability: supports at least 40 nodes on a single RS485 network. Technical specifications (based on the product description) Interface: RS485 bus Protection: lightning protection design and antiinterference design with EMC/ EMI performance Grounding: earth terminal available; connect to earth for outdoor longdistance transmission Connector: standard 2.54 mm pitch pin header Termination: 120 ohm termination resistor; termination enabled by shorting R0 (short circuit recommended for longdistance transmission) Network capacity: supports at least 40 nodes on the same network How to use Connect RS485 devices to the bus using the A/B lines as appropriate for your application. For outdoor or longdistance use, connect the module's earth terminal to ground to improve protection and signal integrity. If longdistance transmission is required, short R0 to enable the 120 ohm termination resistor, improving impedance matching and reducing reflections. Use the standard 2.54 mm header to wire the module into your development board or system for easy integration. Ensure the total number of nodes on the RS485 network does not exceed the supported capacity (at least 40 nodes). Applications and use scenarios Industrial automation and PLC networks: Connect sensors, remote I/O, and controllers over a single RS485 bus across factory floors, warehouses, or production lines with improved protection against electrical noise and transients. Outdoor environmental monitoring and telemetry: Deploy across outdoor sites (weather stations, remote sensors) with reliable longdistance communication and grounded protection to withstand harsh conditions. Building automation and HVAC systems: Link multiple controllers and devices within a building, enabling a stable multinode RS485 network capable of at least 40 devices on the same bus. Notes The description preserves the key functions and network capabilities from the original specification, including lightning protection, EMI/ EMC performance, earth grounding for outdoor use, 2.54 mm header compatibility, a 120 ohm termination option, and support for at least 40 nodes on a single network. No additional features or specifications have been added beyond the provided information.