... frequency shielding pure copper wire;2, RS485 interface chip picked the MAX original industrial chip, ... communication rate can to 2 M;4, RS485 output interface take simple isolating circuit and 600 ... or above operating system version;3), Interface standards: meet TIA/EIA of RS485 / ... Monitoring reading and writing data and yuntai control;(4), household appliances set control;(5), entrance guard ...