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EL-511 Series

10/100 Mbps Serial Device Servers


EL-511 series device server allows your serial devices instantly networking, software direct access to serial devices in the network. EL-511 series of compact, streamlined design, rugged, user-friendly interface to make your serial networking solutions stable and reliable.

Standard TCP / IP interface and a variety of operating modes

EL-511 series device server using standard TCP / IP interface, provides TCP Server, TCP Client, UDP and Real COM operation modes can be sure to use a standard network API (Winsock, BSD Sockets) with network software Compatibility.

Support existing software Real COM driver

We provide automatically to set the serial port parameters Real COM driver for the COM port of the software that now is readily available for TCP / IP network. This feature not only allows your software investment, but also gives networked serial devices instantly.

Simple installation and setup

EL-511 Series serial device servers support automatic IP configuration protocols (DHCP, BootP), as well as manual settings through a Web browser. Both provide fast and efficient installation method. With the EL-511 series ezConfig program, just a few simple steps, you can guide the user to configure and activate the required serial networking applications. With this feature, users need to spend an average of only 30 seconds to complete on the EL-511 series of the set, saving a lot of time and effort.


  • Access / Security control systems (card readers, biometric identification devices)
  • Medical / Healthcare (ECG, ultrasonic detector, blood testing devices)
  • Industrial automation (PLC, test equipment)
  • Telecommunications room (RTU) control, tank liquid level (CTU) detection
  • POS network consumption, LED screen control
  • Building automation control systems (HVAC, fire alarms)
  • Information appliances (UPS monitoring module)

Features and Benefits

- low cost, credit card size
- Support network cable auto-reverse, straight through, crossover cable can work
- Built-in WDT, to ensure long-term stable and reliable work
- Search by ezConfig or Web browser plug-line parameter configuration
- The standard TCP / IP interface, support for TCP Server, TCP Client, TCP Mixed, UDP, Real COM operation modes
- Real serial port mode (automatically set the serial port parameters)
- Support for DNS, DHCP, multicast, and broadcast applications
- Supports two TCP connections
- Full transparent data transfer, disconnection detection
- Supported gateway, across the wide area network routing information


PIN Assignment

Ethernet Interface Number of Ports: 1
Rate: 10/100 Mbps, adaptive MDI / MDIX
Connector: 8-pin RJ45
Magnetic Isolation Protection: Built-in 1.5 KV
Serial Interface Number of Ports: 1
Serial Standards:
EL-511T: RS-232
EL-511S: RS-485
EL-511A: RS-485/422
Connector: DB9 male
Serial Signals RS-232: TxD, RxD, RTS, CTS, GND
RS-422: Tx +, Tx-, Rx +, Rx-, GND
RS-485 (2 lines): Data +, Data-, GND
Serial Communication Parameters Parity: None, Even, Odd, Space, Mark
Data bits: 7, 8
Stop bits: 1, 2
Flow Control: RTS / CTS
Baud rate: 300 bps ~ 4,500 Kbps (4.5 Mbps) (supports non-standard baud rate)
Software Network Protocol: ICMP, ARP, IP, TCP, UDP, DHCP, HTTP, DNS, SNMP V1/V2c
Configuration Options: Web browsers or search tools ezConfig
Mode: TCP Server, TCP Client, TCP Mixed, UDP, Real COM mode
Windows Real COM driver: Windows 95/98/ME/NT/2000, Windows XP
Physical Characteristics Housing: Metal
Weight: 160 g
Without ears: 52 x 80 x 22 mm (2.05 x 3.15 x 0.87 in)
With ears: 75.2 x 80 x 22 mm (2.96 x 3.15 x 0.87 in)
Environmental Limits Operating temperature: -40 ~ 85 °C
Storage Temperature: -65 ~ 150 °C
Ambient Relative Humidity: 5 to 95% (non-condensing)
Power Requirements Input voltage: 5 ~ 22 VDC
EL-511T: 82.5 mA @ 12 V
EL-511S: 89.1 mA @ 12 V
EL-511A: 92.4 mA @ 12 V
Reliability Automatic Reboot Trigger: Built-in WDT (watchdog timer)
Warranty Warranty Period: 5 years