Connect the surge protector to the transmitter
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Surge protectors need to be installed on field pressure transmitters. Question 1: The working principle of surge protectors ； Question 2: Are the surge protectors and signal circuits connected in parallel or in series?
It’s better to ask Baidu for the first question. . . The second one is generally considered to be in parallel; it has a very high impedance. When struck by lightning and the voltage rises instantly, the impedance drops rapidly, and the current is then discharged into the ground through the protector
Take a look at this article: “The Application of Surge Protectors in Petrochemical Plants” http://bbs.hcbbs.com/thread-1587633-1-1.html