Do you attach the SCSI cable to the computer or the instrument? Do you have a manual for this device? Generally, most instruments connect back to the computer through GPIB or serial connections. With those, you communicate through NI-VISA. If you don't have those connections, you would want to look for a driver for the device (generally a .dll). You can then call into this dll using a Call Library Node inside of LabVIEW. I hope this helps!