To obtain the maximum ambient temperature, you must mount the cRIO-904x in the reference mounting configuration shown in the following image. Mounting the cRIO-904x in the reference mounting configuration ensures that your system will operate correctly across the full operating temperature range and provide optimal C Series module accuracy.

Observe the following guidelines to mount the cRIO-904x in the reference mounting configuration.

Figure 68. cRIO-904x Reference Mounting Configuration (8-Slot Controller Shown)


  1. Horizontal mounting orientation.
  2. Mounting substrate options:
    • Mount the cRIO-904x directly to a metallic surface that is at least 1.6 mm (0.062 in.) thick and extends a minimum of 101.6 mm (4 in.) beyond all edges of the device.
    • Use the NI Panel Mounting Kit to mount the cRIO-904x to a metallic surface that is at least 1.6 mm (0.062 in.) thick and extends a minimum of 101.6 mm (4 in.) beyond all edges of the device.
  3. Observe the cooling dimensions in Mounting Requirements for the cRIO-904x.
  4. Allow space for cabling clearance according to Mounting Requirements for the cRIO-904x.
Tip Before using any of these mounting methods, record the serial number from the back of the cRIO-904x so that you can identify the cRIO-904x in MAX. You will be unable to read the serial number after you mount the cRIO-904x.