The WIZ110SR is a gateway module that converts RS-232 protocol into TCP/IP. It enables remote gauging, managing and control of TCP/IP devices through an RS-232 serial interface. In other words, WIZ110SR is a protocol converter that transmits the data sent by serial equipment as TCP/IP data type and converts back the TCP/IP data received through the network into serial data to transmit back to the equipment.
The main components of the WIZ110SR are a WIZnet W5100 embedded ethernet controller chip and an 8051 complaint MCU. Also included on the board are DB9 and RJ45 connectors and a 5.5x2.1mm ..
WIZnet’s WIZ811MJ works as a breakout board for their W5100 embedded TCP/IP chip. Also included on the board is an RJ-45 MagJack connector (RJ45 with X’FMR). It can be used as a component and little effort is required to interface to the W5100. The WIZ811MJ is an ideal option for users who want a simple solution to adding TCP/IP capability to their project.
There is no on-board regulation, so you’ll need to supply clean/regulated power sources. All pins of the W5100 are broken out to two pairs of 10-pin, 0.1" pitch headers.
For detailed information on implementation of Hardware TCP/IP, ref..