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Which are the logic levels that the on board sbRIO RS-232/RS-485/RS-422 ports?
Output Logic States
TX+ set to +5 Volts
TX- set to 0 Volts
TX+ set to 0 Volts
TX- set to +5 Volts
The RS-232 and RS-485 ports on the sbRIO are meant to be connected to other RS-232-compliant and RS-485-compliant devices. There is no need for external level translations or transceivers as they are already built in.
Image: sbRIO-9626 Console out RS-232 signal when booting up in safe mode
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