Features: 1)RS-232 to RS-485 interface converter 2)Photoelectric isolation enhance type(isolation voltage 3,500VRM) Features:1) ... (isolation voltage 3,500V impulse / 500V sequence), special DC/DC module, RS-422/485 lightning protection,1,000W each line7) Point ... /108B are DB9 male and female, ATC-108A RS-485 interface is 7-bit terminal10) Full metal housing, anti-static, powerful ...