Should Rs232 Be Shielded?

RS-232 serial interface cables should be shielded, low capacitance cables, ideally designed specifically for serial data transmission. The shield should be grounded at both ends of the cable.

Does RS-232 need twisted pair?

RS-232 EASY & UNIVERSAL COMMUNICATION INTERFACE

RS-232 is simple and low cost and differs from RS-485 only in the fact that it uses hardware switching to physically control the direction of communication and does not require twisted pairs of wires because it does not use a differential signal.

Does RS-232 need ground?

RS232 Serial Port. Voltage levels with respect to ground represent the RS 232 signals. ... Due to the way the signals are connected, a common ground is required. This implies limited cable length - about 30 to 60 meters maximum.