Why is RS-232 used everywhere for industrial SCADA control systems?

>>59551465
It makes malware easier to develop

>>59551465
It's actually probably not. RS232 is a 12v signal and that's pretty uncommon. I don't specifically know SCADA but an rs232 compatible protocol at lower voltages is very common. Still one of the simplest most tried and true serial protocls there has ever been.
>50 years and going strong

>>59551465
It was an early way to get computers to talk to industrial shit, and once some of the more popular ones started using it then everyone started using it.

>>59551465
Try RS485

It's because USB and other shit has too many layers and makes it impossible to troubleshoot.

RS485 is trivial to understand thus actually useful.

t. Engineer

>>59551465
Trivial to implement, in hardware or software.