1/2/4-Port RS-232/422/485 Serial Device Server

  • 2 x 10/100 Mbps Ethernet ports for LAN redundancy
  • Provides COM port redirection (Virtual COM), TCP, and UDP operation modes
  • Supports up to 921.6 kbps and any baud rate setting
  • Allows a maximum of 5 hosts to access one serial port
  • Allows a maximum of 16 hosts to be accessed in TCP client mode
  • Built-in 15-kV ESD protection for all serial signals
  • Provides rich configuration methods including Windows utility, Telnet console, and web browser
  • Supports 32/64-bit Windows 2000/XP/Vista/7/8/8.1/10, Windows Server 2003/2008/2012, and Linux
  • Automatic RS-485 data flow control
  • Supports line-to-line (2 kV) and line-to-ground (4 kV) surge protection
  • “I” models support a wide operating temperature
  • “CI” models support isolation and a wide operating temperature


The EKI-1521, EKI-1522, and EKI-1524 feature two independent Ethernet ports and MAC addresses to provide a redundant network mechanism that guarantees Ethernet network reliability. These serial device servers are designed to connect RS-232/422/485 serial devices such as PLC, meters, sensors, and barcode readers to an IP-based Ethernet LAN. They allow nearly any device with serial ports 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- 1521, EKI-1522, and EKI-1524 ensure compatibility in network software using a standard network API. Moreover, serial devices can be made communicate with other devices via peer-to-peer, thus eliminating the need for an intermediate host PC and software programming.