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| I already have surge protection on the power supplying my instrumentation, why would I need protection on the 4-20 mA loops as well? |
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| Transient current surges from nearby lightning strikes can be induced into your signal loops via remotely mounted 4-20 mA transmitters of various types and damage anything that is connected to the loop. Also, a surge protector installed on each instrument sharing a signal loop will save the other instruments if a surge is introduced through one of them. |
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