Hwg IP Relay HWg-ER02b
 
P 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. IP Relay HWg-ER02b 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 digital 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, 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 SW HW VSP3 : Virtual Serial Port for Windows (NT service, x64 systems). Supports up to 100 remote serial ports.
Compatible with a range of third party SW. Examples for programmers on using the product are available in the HWg-SDK (Borland C++, MS Visual, VB, C#, PHP, JAVA and more).