RS485 device data acquisitor / IoT gateway designed for industrial environments. It combines multiple functions in one unit, including serial server, Modbus gateway, MQTT gateway, and RS485 to JSON conversion. Key features and benefits Bidirectional transparent data transmission between RS485 and Ethernet, enabling seamless integration of legacy RS485 devices with modern Ethernet/MQTT networks. Compact railmount enclosure with small footprint for easy installation; supports scalable deployments by combining multiple units. Power supply for RS485 to Ethernet C version: 6 36V, with electrical isolation; screw terminals provide secure power input. Versatile gateway capabilities: Modbus gateway for Modbus grid upgrades, compatible with 3D configuration software; ideal for upgrading industrial networks. Flexible protocol and routing options: supports TCP server, TCP client, UDP, and UDP multicast; MQTT/JSON to Modbus bridge for versatile crossprotocol communication. Flexible configuration methods: Web browser configuration; DHCP for dynamic IP; DNS to connect domain server addresses. Multihost rollpolling: identifies and responds to different network devices individually, eliminating crosstalk when communicating with multiple devices. Network time synchronization: NTP support to provide accurate network time for serial output or data uploads. Specifications and compatibility Multifunction device combining serial server, Modbus gateway, MQTT gateway, and RS485 to JSON capabilities. Interfaces: RS4,5 port and Ethernet port for bidirectional data flow. Power input: screw terminals; power range 6 to 36 V (Version RS485 TO ETH C) with electrical isolation. Enclosure: railmount design, suitable for mounting alongside other serial servers. Configurability: Webbased setup with DHCP and DNS support for flexible deployment. Recommended applications and use scenarios Industrial data acquisition and IoT gateway: connect RS485 sensors and controllers to an MQTT broker or cloud service, enabling realtime monitoring and data logging. Modbusbased system modernization: use as a Modbus gateway to bridge Modbus RTU/ASCII devices to Ethernet networks and integrator software, facilitating grid upgrades. Safety, security, and intelligent instrument monitoring: deploy across multiple devices and network segments, leveraging rollpolling to avoid crossdevice interference and using NTP time for synchronized data timestamps. Use case examples Example 1: A factory floor with numerous RS485 sensors and meters streams data over RS485. The gateway converts data to MQTT/JSON and publishes to a central IoT platform, while supporting Modbus gateway functions for existing SCADA controllers. Example 2: A facility upgrading its Modbus network to Ethernet. The gateway acts as a Modbus gateway, enabling seamless communication between RTU devices and Modbus TCP clients, with configuration through a web interface and 3D configuration software. Example 3: A security and facility monitoring deployment across multiple rooms. Each device on the network is individually identified and polled, preventing crosstalk, with network time synchronized via NTP for accurate event timestamps.