<p>楼上也有朋友提到,什么485转换器+收发器方案.</p>
<p>1.设备多,故障维护不方便,经多次存储转发增加时延--->不可取.</p>
<p>2.自控里面的现场总线有分很多种,楼主碰到的总线是什么?</p>
<p> </p>
<p><font face="Verdana">国内有家做得非常齐全的总线站光纤产品<font face="Verdana"><a href="http://www.gongkong001.com/boblb.html">http://www.gongkong001.com/boblb.html</a></font></font></p>
<p><font face="Verdana">ControlNet,Profibus,S908 RIO,Modbus,MB+,CAN,DeviceNet,BACnet,Memobus,DH+,DH485,PPI....</font></p>
<p><img src="http://www.gongkong001.com/UploadFiles/Ware/20110408180852.jpg"/></p> |