Slew Rate and Cable Length

The maximum RS-423 cable length is 118 feet (30 meters) and the maximum RS-232 cable length is 50 feet (15.24 meters). The slew rate changes depending on the speed. For speeds less than 100 Kbaud, the slew rate is set at 5 VDC per microsecond. For rates greater than 100 Kbaud, the slew rate is increased to 10 VDC per microsecond. This allows maximum performance for the greater baud rates and better signal quality at the lesser baud rates.