Web Server for Modbus/TCP and Modbus RTU Devices

The gateway gives full access to remote devices in a flexible and user friendly way. The gateway contains on board web pages to remotely monitor and control devices connected to an Ethernet LAN. The gateway also contain built-in features for alarm handling, data logging and configurable web pages for monitoring and control data from remote devices.

The gateway enables remote management of industrial equipment from a standard web browser. By providing fast and accurate information at any time and place, they help to minimize equipment downtime and unnecessary service personnel travel. The gateway connect to any equipment which supports serial Modbus-RTU and Ethernet Modbus-TCP equipment. This product is especially suited for equipment that needs to be accessed via LAN applications. The gateway has built-in support for remote connection over Ethernet, GSM/GPRS, as well as through external telephone modems and GPS tracking devices*2.






User Manual (PDF 1.62 MB)

Configuration Software (ZIP 300 KB, Windows)

Part Number: VS1

For Pricing: Call, Click here for phone number

Try our complimentary Modbus RTU / TCP Test Program


System Setup / Functions

  • Built-in web server for accessing remote data


  • Ethernet: 10-100 MBit/s
  • Baud Rate: up to 115 kBit/s

Additional I/O

  • 2 Digital Inputs (Isolated, max 24 V DC)

Communication Ports

  • RS-232 (9 Pin D-SUB)
  • RS-232 (Screw Terminal)
  • RS-485 (Screw Terminal)
  • Ethernet Port (RJ45)


Power Supply

  • 9 - 24VDC
  • 2W Power Consumption



  • Ethernet Port 10/100 Mbit/s, RS-232 Port, RS-485 Port
  • Built-in web server for accessing remote data
  • Monitor all important signals on one single page
  • Create custom monitor and program pages
  • Modify parameter using your standard web-browser
  • Use a direct connection with your computer to view your system
  • Connect via the intranet or internet to access server*3
  • Access system via PC, Internet capable mobile device*2
  • Data logging *1 with graphical trend graphs
  • E-mail log files and alams
  • Password restricted access control
  • Alarm History
  • Create up to 64 custom Alarms
  • Alarm and Status handler (notifications via SMS, E-mail and SNMP)
  • Serial / Ethernet communication
  • Built-in digital I/O
  • No licenses/royalty



  • Ethernet 10-100 MBit/s
    Alarms E-mail, SNMP, SMS
    Serial port #1
    Serial port #2 (isolated) RS-232/RS-485
    Serial baud rate Up to 115,2 kbit/s
    Digital Inputs 2
    Protocols Modbus-RTU, ASCII, TCP/IP
    Type of housing Plastic / IP20
    DIN rail mounting Yes
    Dimensions 2.76" x 3.39" x 2.28" / 70 mm x 86 mm x 58 mm
    Operating temperature -40°F to+149°F / -40°C to+65°C
    Power supply 9-24 V DC
    Power consumption 2W
    Certifications: E, CULUS, FCC/IC, PTCRB
    (ATEX/Haz.Loc pending)


*1 Total data logging time depends on number of signals selected and selected sampling rate

*2 Accessing system via mobile network requires mobile/wireless subscription or WIFI connection

*3 Requires internet connection