... -jamming, 600 W lightning protection . USB TO three wire RS485 converterIndustry-specific, antistatic, anti-jamming, 600 W lightning protection ... standard design completely.1, RS485 interface chip picked the MAX original industrial chip, communication distance can reach 1.2 ... the election of CH341T CUP chip, communication rate can to 2 M;3, RS485 output interface take simple isolating circuit ...