Does NI 9151 Expansion Chassis Affect The Performance of C Series Modules ?

Updated Mar 16, 2020

Reported In

Hardware

  • NI-9151
  • NI-9220
  • NI-9222
  • NI-9223
  • NI-9512
  • NI-9514
  • NI-9516
  • NI-9201
  • NI-9203
  • NI-9205
  • NI-9206
  • NI-9221
  • NI-9265
  • NI-9264
  • NI-9263
  • NI-9425
  • NI-9403
  • NI-9218
  • NI-9225
  • NI-9227
  • NI-9229
  • NI-9230
  • NI-9232
  • NI-9234
  • NI-9235
  • NI-9236
  • NI-9237
  • NI-9238
  • NI-9239
  • NI-9242
  • NI-9244
  • NI-9246
  • NI-9247
  • NI-9251
  • NI-9260
  • NI-9853
  • NI-9852

Issue Details

  • I use an NI 9151 R Series expansion chassis with a PXI R Series module. Will using an expansion chassis affect the performance of C Series modules compared to using it with other CompactRIO chassis?
  • Is my C series module compatible with NI 9151 R series expansion chassis ?

Solution

The NI 9151 R Series expansion chassis for C Series I/O imposes speed limits on some modules. In addition, the NI 9151 does not support sharing a timebase between modules with delta-sigma ADCs.

Modules that require high SPI CLK frequencies are not suitable for use with the NI 9151. Modules that require High Speed ​​Interface (DDR clock and maximum SPI throughput) are not supported. These constraints are due to propagation delays and signal integrity from the cable connecting to the NI 9151.

Below is a list of modules that are speed limited by the NI 9151 R Series expansion chassis or that cannot share the timebase.
 
C Series Module TypeModel Numbers
Analog Input ModulesNI 9201 , NI 9203 , NI 9205 , NI 9206 , NI 9221
Analog Output ModulesNI 9263 , NI 9264 , NI 9265
Digital ModulesNI 9403 , NI 9425
Delta Sigma type ADC ModulesNI 9218 , NI 9225 , NI 9227 , NI 9229 , NI 9230 , NI 9232 , NI 9234 , NI 9235 , NI 9236 , NI 9237 , NI 9238 , NI 9239 , NI 9242 , NI 9244 , NI 9246 , NI 9247 , NI 9251
Delta-Sigma DAC ModuleNI 9260
CAN ModulesNI 9852 , NI 9853

Note: The following modules are not supported on the NI 9151 expansion chassis.
 
C Series Module TypeModule Type
Analog I/O ModulesNI 9220 , NI 9222 , NI 9223
Motor Drive Interface ModulesNI 9512 , NI 9514 , NI 9516