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ES-511 Ethernet to Serial Device Server (Ethernet Industrial 1xRS232/422/485)


  • 1 port Software Selectable as RS232, RS422/485 Full Duplex, or RS485 Half Duplex
  • Brainboxes state of the art Autogating for trouble free RS485 Half Duplex flow control
  • Max baud rate 1,000,000 (1 MegaBaud), Custom Baud Rates
  • 10/100Base TX Ethernet port
  • -30oC to +80oC Temperature range
  • User friendly interface, simple to use, powerful in operation
  • Web configuration and RFC2217 compliant interface for non-Windows users
  • IP-30 rated non-conducting polyamide enclosure
  • LED status indication
  • Integrated DIN rail mounting kit
  • Serial Port Tunneling allows serial cable replacement over any distance, no software required
  • Removable screw terminal blocks for easy wiring
  • Simple operation for each and every operating system


Ethernet to Serial Device with 1 Port software selectable as RS232, RS422/485 Full duplex or RS422 Half duplex. ES-511 has removable Screw Terminals Blocks for easy wiring, a slim ‘end on’ case and integral DIN rail mount. Our Industrial Ethernet to Serial has an operating temperature range of -30 to +80 degrees Celsius and with +5VDC to +30VDC Dual input reverse polarity protected power supply making it perfect for industrial applications. Data transfer rates up to 1,000,000 baud, coupled with 1Mbit/s line drivers deliver uncompromising performance. Our Industrial ES range provides simple instant networked serial ports in demanding environments. Serial Port Tunneling allows serial cable replacement over any distance, no software required. Suitable to be wired into existing power and network infrastructure or can be used with our PW-600 power supply.

Windows Users - Our software drivers give you local COM ports, allowing you to retain your existing software applications and connect to your devices over the network. COM Port can be assigned from COM 1 to COM 255 and the Brainboxes Ethernet to serial device remembers your COM Port assignment on reboots.
Web Interface Users (Linux/Apple OS/Android) - A web interface allows secure configuration and control of the serial ports over a local network or the internet using any browser. You can access the device via TCP/IP sockets from any networked device like an Android tablet, PC or phone.

Technical Specifications


LED Information

Status LED Green Device Ready
  Flashing Yellow Changing Settings
  Flashing between Red & Green Querying IP
  Flashing Green/Red User performing Hard Reset
  Flashing between Green & Red/Yellow IP address diagnostic
  Flashing between Green & Yellow Initialization diagnostic
Serial Port LEDs Green light on Port Open
  Flashing Green Data RX / TX
Network LED Green light on Link Established
  Flashing Green Data RX / TX


Ports 1 port Software Selectable as RS232, RS422/485 Full Duplex, or RS485 Half Duplex  
Connector Removable Screw terminal block connector - 3.5 mm pitch  
Power Input Redundant DC Dual Power Inputs, reverse polarity protected +5 VDC to +30VDC  
Power Consumption 1.4 Watt 60mA@24V typical - 2.9 Watt Max  
Conductor Wire 28 to 16 AWG, 0.14mm to 1.5mm Max  

Port Settings - Ethernet

Baud Rate 10/100 Mega bits/second  
Cabling Normal / Crossover auto-sensing (Auto-MDIX)  

Port Settings - Software Selectable as RS232, RS422/485 Full Duplex, or RS485 Half Duplex

Baud Rate Any custom Baud rate between 60 - 1,000,000 (1 MegaBaud) can be selected  
Data Bits 5,6,7 or 8  
Parity Odd, Even, None, Mark or Space  
Stop Bits 1, 1.5 or 2  
Flow Control XON/XOFF Software handshake or RTS/CTS hardware handshake  
Tx/Rx Modes RS232 Standard: RS232 allows point to point communication between 2 devices.
RS422 Standard: RS422 allows one transmitter and up to 10 receivers with data transmitter rates up to 10
megabits per second for distances up to 40 feet and up to 100 Kilobits per second for distances up to 4,000
feet (1219 metres).
To achieve good long distance noise immunity, 2 wires are used to carry each signal, configured as a twisted
pair of cables. The TXD pair and RXD pair are used to carry the data whilst the RTS pair and CTS pair lines are
used for handshaking. Thus 2 twisted pairs are used without handshaking and 4 twisted pair cable is used with
handshaking both these schemes allow full duplex data communications.
RS485 Standard: RS485, based on the RS422 standard allows up to 32 driver/receivers pairs on a standard
load or 128 low load devices per port can be connected. Whilst only one of these should be transmitting data
at any time, the rest can all simultaneously listen to the data. Handshaking is performed by software protocol.
Two twisted pairs form a full duplex system.
Often only one twisted pair cable is used as the TXD and RXD lines are tied together; this is known as
half duplex mode. Brainboxes RS422/485 products implement a state of the art hardware autogating circuit
ensuring error free communications in half duplex configurations.
Industrial Ethernet to Serial RS485: recievers an 1/8th load allowing upto 256 nodes on the bus. Fail
safe open circuit and short circuit protection, protects the Industrial Ethernet to Serial against wiring faults


Operating Temperature -30oC to +80oC  
Storage Temperature -40oC to +85oC  
Ambient Relative Humidity 5 to 95% (non-condensing)  
Housing IP-30 rated non-conducting polyamide case with integrated DIN rail mount  


Network Protocols ICMP, IP, TCP, UDP, DHCP, BOOTP, Telnet, HTTP, RFC2217  
Configuration Options Windows Utility, Web Interface  
OS Compatibility Microsoft Windows 7 32 bit & 64 bit Editions / Windows Server 2008 32 bit & 64 bit Editions / Windows
Server 2008 & Windows 2000 / Windows Vista 32 bit & 64 bit Editions / Windows Server 2003 32 bit &
64 bit Editions / Windows XP 32 bit & 64 bit Editions /Fully RFC2217 compliant / Interface for other OS’s &


Input Industry leading Performance
Throughput guaranteed minimun of 95% of theroretical bi-direction full duplex band width at 1 MBaud
CTS False to Transmitter stop: 3 characters max, 1.5 typical
XOFF recieved to Transmitter stop: 3 characters max, 1.5 typical
RS485 Autogating Turn around time: <1 bit time


Industry Approvals AEO (C-TPAT), WEEE, RoHS, METL, EMC: CE, FCC Compliant  
Microsoft Approvals Microsoft Certified Gold Partner  
Microsoft Signed Drivers Windows Server 2003 32 bit & 64 bit Editions
Windows XP 32 bit & 64 bit editions
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