Hello everybody, Here I want to take some guidance before i can start my work for new product development.I am going to make product in which main CPU card will be communicating with other 16 scanner card.So I am looking for which communication method I have to adopt for communication between CPU and scanner cards.I though like I should use parallel bus interface like PCI or VME but it is very costly.Even Embedded card based on that are very costly so now I came to serial interface. Now I am thinking for any good fieldbus protocol like profibus,lonworks,interbus etc. If i am going for Profibus,then can anybody help me how I have to go?whether I have to implement by using specific protocol chip or by using software protocol with RS485 only? Please suggest me regarding this. Please reply me also my email id: premjic@masibus.com Thanking you, regds, Premji Chaudhari.