Ethernet Module with 20 Relays and 8 Inputs
The Devantech relay module has an Ethernet interface, 20 relays with a current rating of 16Amp (24vdc or 250vac) and 8 analogue inputs (0-5V). The relays can be controlled by clicking on a web page or by TCP/IP commands.
A free Android App or iPhone App (see also the manual) can be used for remote control with the smartphone. If you set up port forwarding on your router, you can also control the module via the internet.
This board needs a power supply of 12V 1A.
More information can be found on the website of Devantech