IP Relay HWg-ER02b connects a full RS-232/485 serial port and a set of two digital inputs and two digital outputs to the Ethernet. It features a truly full RS-232 serial port (9-pin). The serial port of the unit can be connected to a PC over the LAN, with the serial port accessible in Windows as a Virtual Serial Port (VSP). Its digital inputs and outputs can be controlled over the Web or through Modbus/TCP.

A built-in web server is used for configuring. Using the free HW VSP3 application, up to 100 remote serial ports can be connected to one PC.

Two devices can be connected in Box-2-Box mode. In this mode, the digital I/O as well as the RS232/485 serial line is extended (tunneled) over the LAN.

Features:

• 1x full serial port RS-232/485 with 9-bit communication support
• Modbus/TCP protocol supported for I/O control
• 2x Digital Input (for Dry contacts, switches, or 5–20V DC)
• 2x Digital Output (NO/NC relay; max 230V/16A)
• M2M communication protocols: HTTP, Telnet, TCP Server, TCP Client/Server, Modbus/TCP
• Connected via LAN. Configuration via built-in web server or Telnet
• Full RS-232 serial port (9 pins: RxD, TxD, GND, CTS, RTS, DSR, DTR, RI, CD)
• RS-485 serial interface: up to 115,200 Bd
• Free software HW VSP3: Virtual Serial Port for Windows (NT service, x64 systems), supports up to 100 remote serial ports
• Compatible with third-party SW; programming examples available in the HWg-SDK (Borland C++, MS Visual, VB, C#, PHP, JAVA, and more)

Applications and usage:

• Link two buttons/switches to a software application
• Connect RS-232 devices to your LAN (barcode / RFID scanners, serial printers, displays)
• Control relay outputs remotely to open doors, trigger alarms, or disconnect power (web relay use)
• I/O can be controlled over Modbus/TCP from any SCADA system, independently of the serial line
• Remote power switching (230/110V AC) for appliances and equipment
• Connect RFID readers over LAN and remotely reset associated equipment
• Integrate barcode readers over Ethernet while controlling DI/DO in an application
• Remote UPS or diesel generator monitoring with RS-232 + remote start/test over I/O
• Vending machines
• Security alarms
• Access control systems
• Barcode scanners with LAN relay integration (remote I/O)