Modbus bus coupler Modicon TM3. For connecting decentralized I/O islands to Modicon M221, M241, M251 and M262 PLC controllers, as well as to third-party systems. Very compact design with a device width of just 27mm for space-saving installation. Two galvanically isolated RS485 ports for Modbus SL (RTU) with RJ45 sockets for daisy chain. The power supply is via 24VDC. Web server for easy access to configuration data and parameters, status information, I/O data, network statistics and diagnostic information. Access to information via web browser, even remotely. Equipped with a USB mini-B port (for programming, firmware updates and web server access), two rotary switches for address configuration and QR code with device ID and link to technical documentation. Planning and configuration using EcoStruxure Machine Expert software or standalone configurator (download from www.se.com). Connection via removable screw terminal blocks with 3.81mm pitch. Ambient temperature during operation -10°C to +60°C. Installation on 35mm DIN rail or directly on control panel with optional holder. Certifications according to CE, cULus, EU RO (Marine Certification), Achilles.