I want to start learning SIEMENS product please tell how to start it 

What does this do i want to learn it please tell how it work

SICAM SGU

Hello btrby;

SICAM is the name of a product family developped by the Siemens Energy division (known today as Smart Grid), so unfortunately this forum has no privilidged access to information on these products.

You can find information on the SICAM SGU in the Smart Grid webpages, such as:

https://w3.siemens.com/smartgrid/global/en/products-systems-solutions/substation-automation/remote-terminal-units/pages/sicam-sgu.aspx

In the first tabs you will find general information on the product, and in the Downloads page you will have access to various manuls.

Hope this helps,

Daniel Chartier