The contact in line 5 is normally open and the contact in line 11 is normally closed. Many times there are also small numbers printed next to each of the electrical components on the diagram. In our ...

In a PLC-controlled system, problems rarely occur inside the PLC. A malfunction is nearly always on the input side or output side of the PLC. The ladder diagram shows you what the inputs and outputs ...

Programmable logic controllers (PLCs) are used extensively throughout the world. Over time, they have advanced to become more user-friendly, efficient, smaller, and less expensive. Different types of ...