Ethernet Network LAN W5100 Shield Bus Communication Module for Arduino Uno

The Ethernet Shield for connects your to the internet in mere minutes. Just plug this module onto your board, connect it to your network with an RJ45 cable(not included) and follow a few simple instructions to start controlling your world through the internet. As always with , every element of the platform hardware, software and documentation is freely available and open-source. This means you can learn exactly how it's made and use its design as the starting point for your own circuits. Hundreds of thousands of boards are already fueling peoples creativity all over the world, everyday.
The Ethernet Shield for allows an board to connect to the internet. It is based on the Wiznet W5100 ethernet chip. The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP. It supports up to four simultaneous socket connections. Use the Ethernet library to write sketches which connect to the internet using the shield. The ethernet shield connects to an board using long wire-wrap headers which extend through the shield. This keeps the pin layout intact and allows another shield to be stacked on top.

Specification:

Requires an board (not included)
Operating voltage 5V(supplied from the board)
Ethernet controller: W5100 with internal 16K buffer
Connection speed: 10 / 100Mb
Connection with on SPI port
IEEE802.3af compliant
Low output ripple and noise (100mVpp)
Input voltage range 36V to 57V
Overload and short-circuit protection
9V output
High efficiency DC / DC converter: typ 75% @ 50% load
1500V isolation (input to output)