The **UDS-11-R** is an ultra-compact, single-port serial-to-Ethernet device server designed by Lantronix. It acts as an interface bridge, allowing older serial (RS-232) devices to communicate over a TCP/IP network. Below is a breakdown of its core electronic components and technical specifications. --- ### 1. Key Electronic Components | Component | Description | Function | | :--- | :--- | :--- | | **DSTNI-EX Chip** | Lantronix's proprietary SoC (System on Chip). | Integrated CPU, memory, and Ethernet MAC/PHY. | | **Flash Memory** | 512 KB internal storage. | Stores the firmware and web configuration pages. | | **SRAM** | 256 KB volatile memory. | Used for data buffering and runtime processing. | | **Serial Transceiver** | RS-232 Level Shifter. | Converts serial voltage levels to logic levels for the SoC. | | **Ethernet Transformer** | Isolation magnetics. | Provides electrical isolation for the RJ45 port. | --- ### 2. Interface Specifications The UDS-11-R is defined by its physical and logical connections: #### A. Serial Interface (RS-232) * **Connector:** DB9M (DTE). * **Baud Rates:** 300 bps to 230,400 bps. * **Flow Control:** Hardware (RTS/CTS) and Software (XON/XOFF). * **Characters:** 7 or 8 data bits. #### B. Network Interface (Ethernet) * **Standard:** 10/100Base-T. * **Connector:** RJ45 port with link/activity LED indicators. * **Protocols:** TCP/IP, UDP/IP, ARP, ICMP, SNMP, TFTP, Telnet, DHCP, HTTP. --- ### 3. Power and Physical Design * **Power Input:** 9-30VDC or 9-24VAC (via a power jack or the DB9 connector). * **Power Consumption:** Approximately 1.8W typical. * **Reset Button:** A recessed button allows for hardware factory resets. * **Isolation:** The "R" in the model name often refers to specific certifications or ruggedized compliance for industrial environments. --- ### 4. Logic and Communication Modes The electronics are programmed to handle three primary data modes: 1. **Tunneling:** Two UDS-11-R units used in pairs to extend a serial cable over a long-distance network. 2. **Redirector:** Using "Com Port Redirector" software to make the Ethernet device appear as a local COM port on a PC. 3. **TCP/UDP Server/Client:** Direct socket communication between a custom application and the serial device.