07-25-2007 03:12 PM
07-25-2007 03:33 PM
07-25-2007 05:28 PM
07-25-2007 09:44 PM
07-26-2007 09:59 AM
I've seen 232 to 485 converters listed as "isolated" and "non-isolated" what's the difference, and how do I know which one I need?
07-26-2007 10:43 AM - edited 07-26-2007 10:43 AM
An isolated converter will completely detach the wiring from one side of the converter to the other. They will use optoisolators or sometimes transformers to get the signals across. This is so if there is a high voltage fault on one side that causes a high voltage to land on the signal wires, the high voltage won't get passed through. It is for safety and to protect the electronics on the other side. Of course an isolated version costs more, but if your dealing with high voltage electronics such as a 480 VAC motor controller, it is probably a good idea to get it.
A non-isolated converter will pass through some of the wires such as the ground wire, or +5VDC power wires. If your dealing with lower voltage electronics where there isn't a worry about safety or a need to protect the electronics from electrical faults, the non-isolated converter should work fine.
Message Edited by Ravens Fan on 07-26-2007 11:44 AM
07-26-2007 10:45 AM
02-20-2008 02:36 AM
12-06-2009 12:28 AM
thanks,I will study it.
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03-09-2011 12:16 PM
Yes, this is definately possible, you can use a standard RS232 to RS485 converter to convert the RS232 to a multi-drop RS485, I did that sucessfully with several devices through Labview.