To transfer files from Linux to Windows using SSH, choose one of the following applications: PuTTY. PuTTY is a suite of different command line tools for working with an SSH daemon. Download it from http://www.chiark.greenend.org.uk/~sgtatham/putty.html.
In contrast, in the case of refinery piping, not only is the pipe thickness greater but also the handmade bevels are not so smooth. Tack welds are also used instead of clamps and the root gap is not as uniform as in the case of the pipeline joint. Therefore the uphill welding technique (Figure 2) is a better choice.
Sinking and sourcing are two important terms when discussing input and output connections of PLCs. Sinking is the common ground line (-) and sourcing is the common VCC line (+). VCC stands for the positive supply voltage connection point. Sinking and sourcing inputs only conduct electricity in one direction.