RS-232 surge protection

Posted on Oct 8, 2012

The following circuit are provded here to give your idea how the overvoltage protecton circuits really work and how you can easily add some protection to your circuits. To make theose circuit really effective need careful component choosing and good construction. For best performace I recommend using commercial units from realiable data communication product manufacturers.

RS-232 surge protection
Click here to download the full size of the above Circuit.

RS-232C serial port lines are quite prone to be damaged by overvoltages. The damaged to computer serial ports have become more and more expensive to replace because of higher intergaration: usually you have to buy new motherboard if one serial port in it

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