Mitsubishi FX0N/FX1N/FX2N/FX3U/FX3G...... series PLC programming interface RS422 to RS485 and RS232. Optoelectronic isolation; Lightning and surge protection; Maximum communication distance: 2km; Standard lead rail mounting; Upgrade product of FX-232AW, FX-232AWC, and FX-232AWC-H.