Re: [EE] RS232 protection

https://www.serialcomm.com/serial_rs232_converters/opto_isolated_and_surge_suppressors/rs232_isolator/rs232_3_wire.product_general_info.aspx
under $30 us.


On Mon, Feb 9, 2026 at 9:46 AM Neil <[email protected]> wrote:

> Hi all,
>
> I'm reading data from a very expensive device in a vehicle over RS232,
> using a MAX3232 chip.
> Just reading, so only one data line and +12V/Gnd coming from the
> vehicle's power outlet.
> Out of an abundance of caution, I would like to do anything extra I can
> to help protect the expensive device from anything that could go wrong
> with my add-on. Even shorted wires, etc.
> I did find some (expensive) chips that help with this, specifically ESD,
> but wondering what other in-between things I can do to just help isolate
> my device from the one in the vehicle.
> Suggestions welcome.
>
> Cheers,
> -Neil.
>
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