USR-K7 Industrial Ethernet to Serial Module with BiDirectional Transmission

The USR-K7 is an industrial-grade Ethernet to serial module designed for stable, reliable, and bi-directional data transmission between serial devices and Ethernet networks. Built for industrial applications, it has been rigorously tested to operate continuously at -40 C to +85 C and has passed 24/7 stability pressure testing, making it highly reliable for critical automation, control, and IoT systems.

This compact module supports high-speed communication with a serial baud rate ranging from 600 bps to 1 Mbps, enabling rapid data exchange between devices such as PLCs, meters, sensors, and controllers. It provides seamless protocol conversion and transparent data transmission, ensuring integration without modification of existing serial protocols.

The USR-K7 supports multiple networking modes including TCP Server, TCP Client, UDP Server, UDP Client, and comes equipped with Modbus RTU to TCP gateway functionality, making it suitable for industrial automation, SCADA, and monitoring systems. Additionally, WebSocket support, custom webpages, and RFC2217 functionality allow easy integration with cloud platforms and web-based monitoring applications.

Configuration is flexible through setup software, web-page interface, or AT commands. The module provides robust caching mechanisms, including 16 KB Ethernet send/receive buffer and 2 KB serial buffer, maintaining smooth data flow even under high network load. With an average LAN latency under 10 ms, it guarantees fast and responsive communication.

Designed for harsh environments, the USR-K7 features 1.5KV electromagnetic isolation protection and can withstand wide temperature and humidity ranges, ensuring safe and long-term operation in industrial settings.

Key Features

• Industrial-grade Ethernet to serial module
• Bi-directional transparent data transmission
• High-speed serial support: 600 bps - 1 Mbps
• Networking modes: TCP Server/Client, UDP Server/Client
• Modbus RTU TCP gateway and Modbus polling
• WebSocket support for web-to-serial communication
• RFC2217-compatible for legacy software integration
• Customizable webpages and registration packets
• Robust caching: 16 KB Ethernet, 2 KB serial
• Low average LAN latency (<10 ms)
• Wide operating temperature: -40 C to +85 C
• 1.5KV electromagnetic isolation protection

Hardware Specifications

• Work Voltage: DC 3.0-3.6 V (3.3 V optimal)
• Work Current: 130 mA @ 3.3 V
• Ethernet Interface: RJ45, 10/100 Mbps, auto MDI/MDIX
• Package Type: Pin-in package
• Serial Baud Rate: 600 - 1,000,000 bps
• Module Dimensions (L × W × H): 35.0 × 19.39 × 18.25 mm

Software & Networking

• Network Protocols: IP, TCP, UDP, DHCP, DNS, HTTPS, ARP, ICMP, WebSocket
• IP Mode: Static IP or DHCP
• DNS: Supported
• Work Modes: TCP Server/Client, UDP Server/Client, HTTPSD Client
• Web-to-Serial: WebSocket enabled
• Virtual COM Support: Windows compatible
• Web Cache: 16 KB send/receive
• Serial Cache: 2 KB send/receive
• Average LAN Latency: <10 ms

Environmental & Protection

• Operating Temperature: -40 C to +85 C
• Storage Temperature: -40 C to +105 C
• Operating Humidity: 5% - 95% RH
• Storage Humidity: 5% - 95% RH
• Protection: 1.5KV electromagnetic isolation

What's in the box
1 x USR-K7 Industrial Ethernet to Serial Module with Bi-Directional Transmission