The USB-6423 input multiplexers provide a lot of flexibility when configuring AI terminals. However, simultaneously-sampled mioDAQ devices, such as the USB-6451, have more restrictions on the AI Terminal Configuration and channel scanlist.

Follow these rules to enable migration to simultaneously-sampled mioDAQ devices:

  • Only include a channel a single time in a given scan.
  • When a specific channel is configured for differential (DIFF) mode, do not use the positive or negative inputs from that same channel for referenced single-ended (RSE) or non-referenced single-ended (NRSE) measurements.
  • When performing single-ended measurements, pick a common measurement reference for all channels, either RSE or NRSE.