Acquiring Digital Data (RS-232) Through The USB-X

[Lacksagoo]

Hello LabVIEWers,

I would like to acquire digital data using my NI 6363 USB-X device.  I have an attachment that separates the transmit, receive, and ground from the instrument's original DB9 connector.

If this is a less than optimal method for acquiring this kind of data, I could attach an RS-232 to USB converter and use VISA to talk through a COM port.  But I'd prefer to use the NI 6363.

Thank you in advance for your help.

[johnsold]

RS-232 voltage levels are not compatible with a digital port. RS-232 voltage levels can be too high for the the analog inputs. Even if you built adapters to make the voltages compatible, the time it would take to write the software to interpret the inputs would be much longer than the few seconds it takes to call up a serial port example VI.

Look for a converter from RS-232 to USB based on the FTDI chips. They seem to be more consistently reliable when used with LV.

Lynn