I don't understand your question. There ARE optically isolated RS232 transceivers out there, and their intention is to protect the equipment. But you need TWO transceivers to make an information transaction on RS232, whether they're optically isolated or not...hi
i have a device that use RS232 Optical Isolation Transceiver for connect to pc . Now my question is : do it will work without Transceiver ?
Then I don't understand what you are asking. Do you want to remove the isolation and replace it with wires?because this Transceiver is for protect between pc and device , Both sides is RS232
It depends. Do you know what levels the PC is using from the USB to RS232 converter.
I did make the ground potential argument in post #7. That said if we are talking about a laptop and another device that sits on the desktop there may not be much potential difference between the grounds. It would be helpful to know more about the TS/OPs device.The optical isolation for a RS232 link is not because there are different voltage levels in the signals; it is because there is likely a potential difference between the ground potential on the remote equipment chassis and the ground potential on the PC chassis. If you connect the RS232 cable without optical isolation, you create a "ground loop" between the two devices, which will screw up the signals...
It can also be done for safety. If the remote equipment is for swimming pools, spas, medical devices, etc., then there could be a shock hazard that comes from the PC power supply along the common wire in a non-opto-isolated RS232 cable. The opto-isolation effectively lets the remote equipment operate at a different ground potential than the PC.
If the maker of the remote equipment wants opto-isolation, it is for a reason, and you would be a fool to eliminate it...
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