Last night I setup a machine that talks to our security system over Serial Connection. The serial cable goes through the roof of our building. The machine I setup this one, also hosts important VM's. A co-worker said he thinks this is extremley dangerous as the serial cable could fry the mother board if it got a power surge.

Does this fear have merit? He recommended getting Serial to Ethernet adapter (100/150$), then either connecting to switch, or an AP, then getting another AP with a Ethernet to serial connection.

What are your thoughts, is this overboard?

There is also this device, but his words, 15$ device protecting 3K Server, which I understand.



We ended up getting this Optical Isolated serial to USB adapter, which should protect from a surge.

Circuit isolation provides electrical protection for sensitive, and often expensive industrial equipment


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