C Series Multidevice Tasks

A task can include channels from multiple C Series devices, given the following conditions. When you include channels from multiple C Series devices in a task, NI-DAQmx automatically synchronizes the devices.

• All channels in the task must be of the same I/O type, but they cannot be counter I/O channels
• If the task includes channels from a mixture of NI 9225, NI 9229, NI 9233, NI 9234, NI 9235, NI 9236, NI 9237, and NI 9239 devices, you must account for filter delay differences between the devices.
• The devices must all be in the same NI cDAQ-9172 chassis.
• AI tasks containing only 16-bit or lower resolution AI modules use half the USB bandwidth of tasks with 24-bit AI modules.
• The format of raw data returned by a C Series AI task varies depending on if any 24-bit AI modules are in the task and might not correspond to the order of the channels in the task. Scaled or unscaled data is preferable to raw data with the NI cDAQ-9172 chassis.