In a car where are the various instruments electrically powered from, and where do they send/receive their signals?

Step 4

Revision questions - Answer the following questions to self-assess/revise your knowledge of the subject.

Q 1: What type of control cards would you encounter on a control rack in a typical process control cabinet?

Q 2: What other type components would you see in a typical process control cabinet?

Q 3: How can we control the actuation of an on/off valve via the panel?