RS-232/485 converter in DB9F format, with 1500 V optoisolation between data lines and earth. It extends the signal up to a distance of 1.2km and allows the conversion of signals from RS-232 to RS-485. Automatic data sending control. it does not require installation of any software driver. Suno Baud rate to 9600 kbps. It must be powered externally with 10-14Vdc