Advantech EKI-1511 Serial-to-Ethernet Device Server

Advantech EKI-1511 Serial-to-Ethernet Device Server provides an economical solution for connecting RS-232 or RS-422/485 serial devices such as PLC, meters, sensors, and barcode readers to an IP-based Ethernet LAN. The EKI-1511 allows nearly any device with a serial port to connect and share an Ethernet network while also providing various operations such as COM port redirection (Virtual COMport), TCP server, TCP client, and UDP mode. With COM port redirection mode, standard serial operation calls are transparently redirected to the servers, guaranteeing compatibility with legacy serial devices and enabling backward compatibility with existing software. With TCP server, TCP client, and UDP modes, the EKI-1511 Series ensure compatibility in network software using a standard network API. Serial devices can communicate with other devices via peer-to-peer, thus eliminating the need for an intermediate host PC and software programming.

The Advantech EKI-1511 Serial-to-Ethernet Device Server is available for RS-232 (EKI-1511L, EKI-1511IL) and RS-422/485 (EKI-1511X) applications. The EKI-1511IL features an extended -40°C to +75°C operating temperature.


  • RS-232 and RS-422/485 Serial Device Servers
  • 1x 10/100 Mbps Ethernet port
  • Provides COM port redirection (Virtual COM), TCP, and UDP operation modes
  • Provides multiple configuration methods including Windows utility, Telnet console, and Web browser
  • Supports baud rates up to 4Kbps
  • Up to five hosts can access one serial port
  • Up to 16 hosts can be accessed in TCP client mode
  • Built-in 8kV ESD protection for all serial signals
  • Supports 32/64-bit Windows 2000/XP/Vista/7/8/8.1/10, Windows Server 2003/2008/2012, and Linux
  • "I" models support a wide operating temperature


  • Remote monitoring environments
  • Security systems
  • Factory automation
  • Supervisory Control And Data Acquisition (SCADA)
  • Transportation
  • Kiosks and Point of Sale (POS)


  • Ethernet Communications
    • Compatibility: IEEE 802.3, IEEE 802.3u
    • Speed 10/100Mbps
    • Number of Ports: 1
    • Port connector: 8-pin RJ45
    • Protection: Built-in 2.25k VDC magnetic isolation
  • Serial communications
    • Port type
    • EKI-1511L: RS-232
    • EKI-1511X: RS-422/485
    • Number of Ports: 1
    • Port connector: DB9 male
    • Data bits: 5, 6, 7, 8
    • Stop bits: 1, 1.5, 2
    • Parity: None, Odd, Even, Space, Mark
    • Flow control: XON/XOFF, RTS/CTS
    • Baud rate: 300bps to 230.4kbps
    • Serial signals
      • RS-232: TxD, RxD, CTS, RTS, GND
      • RS-422: TxD+, TxD-, RxD+, RxD-, GND
      • RS-485 2-wire: Data+, Data-, GND
      • RS-485 4-wire: TxD+, TxD-, RxD+, RxD- GND
    • Protection: Built-in 8KV ESD for all signals
  • General
    • LED Indicators System: Power, System Status/LAN: Speed, Link/Active, Serial, Tx, Rx
  • Power Requirements
    • Input: 9V to 36VDC
    • Connector: Terminal block
    • Consumption: 1W
  • Software
    • Driver support:
      • 32-bit/64-bit Windows 2000/XP/Vista/7/8/8.1/10
      • Windows Server 2003/2008/2012
      • Linux
    • Operation Modes:
      • COM port redirection mode (Virtual COM)
      • TCP/UDP server (polling) mode TCP/UDP client (event handling) mode
      • Pair connection (peer to peer) mode
    • Configuration: Windows utility, Telnet console, Web browser
    • Management: SNMP MIB-II
  • Mechanics
    • Dimensions: 46.0mm x 85.1mm x 21.2mm
    • Enclosure: Metal with solid mounting hardware
    • Mounting: DIN-rail, Wall
    • Weight: 0.127kg
  • Environment
    • Operating temperature:
      • EKI-1511L, EKI-1511X: -10°C to 60°C
      • EKI-1511IL: -40°C to 75°C
    • Storage temperature: -40°C to 85°C
    • Operating humidity: 10% to 95% RH
  • Regulatory approvals
    • EMC: CE, FCC Part 15 Subpart B (Class A)


Mechanical Drawing

Mechanical Drawing - Advantech EKI-1511 Serial-to-Ethernet Device Server
Published: 2021-08-10 | Updated: 2022-03-11