National Instruments BNC -2140 - Manual (Page 17)

Chapter 3 Signal Connections
BNC-2140 User Manual 3-6 ni.com
Caution When you configure an analog output channel in the SE mode, the voltage
between AOGND and –DACxOUT must not exceed ±7.07 V (5 V
rms
). Voltage that exceeds
this rating can damage the BNC-2140, the DSA plug-in device, and the computer. National
Instruments is not responsible for any damages resulting from connections that exceed this
rating.