Quote Originally Posted by vre View Post
i mean which optocoupler from all which are in this list is suitable (not only tlp785/please go to link)

optocouplers!
You need to do the research and read the datasheets, and if you don't know how to interpret a datasheet then you probably don't have the knowledge to use the part... but I happen to know the 6N137 is an alternative for HPCL2601