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IP Relay HWg-ER02b RS232-485 Serial Port Ethernet Converters

Prices from £315.00 inc. VAT or £378.00 ex. VAT
Prices from £378.00 inc. VAT
Prices from £315.00 ex. VAT
Total price delivered from £323.95 ex. VAT or £388.74 inc. VAT
Total price delivered from £388.74 inc. VAT
Total price delivered from £323.95 ex. VAT
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The IP Relay HWg-ER02b RS232-485 Serial Port Ethernet Converter connects an RS232/485 serial port and a set of two digital inputs and two digital outputs to an Ethernet connection. The serial port of the device can be connected to a PC over the LAN, with the serial port accessible in Windows as a Virtual Serial Port (VSP). The digital inputs and outputs can be controlled over the Web or through Modbus/TCP. The device has a built-in web server for configuration and the HW VSP3 software application can connect to 100 remote serial ports to a single PC. Two IP Relay HWg-ER02b RS232-485 Serial Port Ethernet Converter devices can be connected in a Box-2-Box mode to extend the capabilities.

HWg-ER02b Set Kit

The HWg-ER02b is supplied with a power adapter and software.

Key Features

  • 1x full serial port RS232/485 with 9-bit communications support
  • Modbus/TCP protocol supported for I/O control
  • Two Digital Inputs (for Dry contacts, switches, or 5-20Vdc DC)
  • Two Digital Output s(NO/NC digital relays, max 230V/16A)
  • Machine-2-Machine (M2M) communication protocols: HTTP, Telnet, TCP Server, TCP Client/Server
  • Ethernet LAN connection and configurable via a built-in web server and TELNET
  • Full RS232 serial port (9 pins: RxD, TxD, GND, CTS, RTS, DSR, DTR, RI, CD)
  • RS485 serial interface with up to 115,200 Bd rate
  • Free HW VSP3 software to provide a Virtual Serial Port for Windows (NT service, x64 systems) and supports for up to 100 remote serial ports
  • Compatible with a range of third-party software platforms using Borland C++, MS Visual, VB, C#, PHP, JAVA and more)


  • Link two buttons or switches with a software application
  • Connect RS232 devices to a local area network including barcode, RFID readers, serial printers and displays
  • Inputs/Outputs (I/o) can be controlled over MODBUS/TCP from any SCADA system independently of the serial line
  • Output signals can be used to open a door, turn on a sounder or disconnect power. remotely over the network
  • Remote control of power and other technologies over RS232 and RS485
  • Remote control of displays and signal lights
  • Remote status checks on PIR sensors, door contacts and security systems
  • RFID and card readers
  • Vending machines
  • Security alarms
  • Access control systems
  • UPS system control and data logging devices
  • Barcode scanners


Physical Installation

  • Plastic Case
  • Installation: DIN, flat surface
  • Design: Industrial