RS485 signal surge

2009-12-14View Original

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Can surge protectors and safety barriers be added to RS485 signals going into a DCS? Today, someone said that the RS485 signal is relatively weak, so there’s no need to add a surge protector. . .

Reply #22009-12-14

Electrical characteristics of RS-485: A logic “1” is represented by a voltage difference between the two lines of +(2–6) V； Logical “0” is represented by a voltage difference between the two lines of - (2–6) V; the signal level at the interface is lower than that of RS232, so it is not necessary to use surge protectors.

Reply #32009-12-15

First, it is necessary to clarify what the purpose of installing surge protectors is; otherwise, discussing whether they are needed or not would be pointless.

Reply #42009-12-15

Can’t you understand what my question means? What are you putting in? I don’t know what the surge protector is for; I still bring up this question. 3# hec_1831

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RS485 signal surge

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