Connecting the cRIO-903x to Power

The cRIO-903x requires a 9 V to 30 V external power supply. The cRIO-903x filters and regulates the supplied power and provides power for the C Series modules. The cRIO-903x has a primary power input, V1, and a secondary power input, V2.

The POWER LED on the cRIO-903x indicates which power input is in use. Refer to POWER LED Indicators for more information about the POWER LED states.

Notice Do not connect V2 to a DC mains supply or to any supply that requires a connecting cable longer than 3 m (10 ft). A DC mains supply is a local DC electricity supply network in the infrastructure of a site or building.

What to Use

  • Ferrite (781233-02), included with the cRIO-903x
  • Screwdriver, 2.54 mm (0.10 in.) flathead
  • Primary power supply:
    • (cRIO-9030/9031/9032/9033/9034) 9 V to 30 V, 40 W minimum
    • (cRIO-9035/9036/9037/9038/9039) 9 V to 30 V, 46 W minimum
  • (Optional) Secondary power supply:
    • (cRIO-9030/9031/9032/9033/9034) 9 V to 30 V, 40 W minimum
    • (cRIO-9035/9036/9037/9038/9039) 9 V to 30 V, 46 W minimum

NI recommends the power supplies listed in the following table for the cRIO-903x.

Table 23. NI Power Supplies
Power Supply Part Number
NI PS-15 Industrial Power Supply (24 V DC, 5 A, 100 V AC to 120 V AC/200 V AC to 240 V AC input) 781093-01
NI PS-10 Desktop Power Supply (24 V DC, 5 A, 100 V AC to 120 V AC/200 V AC to 240 V AC input) 782698-01

What to Do

Complete the following steps to connect a power supply to the cRIO-903x.

  1. Ensure that your power supply is powered off.
  2. Install the ferrite on the negative and positive leads of the power supply, as shown in the following figure.
    Figure 14. Installing a Ferrite on the Power Leads

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    1. Pass the leads through the ferrite twice, leaving 50 mm to 75 mm (2 in. to 3 in.) between the ferrite and the end of the leads.
    2. Close the ferrite around the leads.
  3. Remove the power connector from the cRIO-903x.
    Caution Do not tighten or loosen the terminal screws on the power connector while the cRIO-903x is powered on.
    Attention Ne pas serrer ou desserrer les vis des bornes sur le connecteur d'alimentation pendant que le cRIO-903x est sous tension.
  4. Connect the primary power supply and optional secondary power supply to the power connector, as shown in the following figure.
    Figure 15. Power Connections

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    Note The C terminals are internally connected to each other.
  5. Tighten the terminal screws on the power connector to 0.20 N · m to 0.25 N · m (1.8 lb · in. to 2.2 lb · in.) of torque.
  6. Install the power connector on the front panel of the cRIO-903x.
  7. Tighten the power connector screw flanges to 0.20 N · m to 0.25 N · m (1.8 lb · in. to 2.2 lb · in.) of torque.
  8. Power on the primary power supply and optional secondary power supply.