RS485通信经典电路(for初学者)

screen.width-461) window.open(" src="http://2008sfile.ic37.com/2008file/tech/2008-2-16/0216195021_1553_0.jpg" width=340 onload="if(this.width>screen.width-460)this.width=screen.width-460" border=0 7_971.jpg?);? Mon_0508 attachment>

RS485通信经典电路

本电路的TR1,TR2是为了防止高压用的,有保护电路的作用,R0,R1是用于阻抗匹配的