KainRolle515

The RS232 serial port over a PC applications 3 to 25 volts to indicate a reason number of , and -3 to -25 volts to signify a reason degree of 1. Most microcontrollers use TTL / CMOS reasoning values which use to many limit voltage to indicate a reasoning amount of , plus some threshold voltage to 5 volts to signify a logic level of 1. To ensure the Computer including a microcontroller to actually talk some reasoning standard language translation is required. 8 port RS422 serial card