Connecting the Controller to Power
The cRIO-904x requires a 9 V to 30 V external power supply. The cRIO-904x filters and
regulates the supplied power and provides power for the C Series modules. The cRIO-904x
has a primary power input, V1, and a secondary power input, V2.
The POWER LED on the cRIO-904x indicates which power input is in use, as shown in the
following table.
Table 1. POWER LED Indicators
LED Color LED Pattern Indication
Green Solid The cRIO-904x is powered from the V1 input.
Yellow Solid The cRIO-904x is powered from the V2 input.
— Off The cRIO-904x is off.
Notice Do not connect V1 or 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 (included in kit)
• Screwdriver, 2.54 mm (0.10 in.) flathead
• Primary power supply, 9 V to 30 V, 60 W minimum
• (Optional) Secondary power supply, 9 V to 30 V, 60 W minimum
NI recommends the power supplies listed in the following table for the cRIO-904x.
Table 2. NI Power Supplies
Power Supply Part Number
NI PS-15 Industrial Power Supply
(24 VDC, 5 A, 100 VAC to 120 VAC/200 VAC to 240 VAC input)
781093-01
NI PS-10 Desktop Power Supply
(24 VDC, 5 A, 100 VAC to 120 VAC/200 VAC to 240 VAC input)
782698-01
What to Do
Complete the following steps to connect a power supply to the cRIO-904x.
1. Ensure that your power supply is powered off.
2. Install the ferrite (National Instruments part number 711849-01, included in the shipping
kit) on the negative and positive leads of the power supply, as shown in the following
figure.
cRIO-904x Getting Started Guide | © National Instruments | 7
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