Table 5. Power Connector Pinout
Pinout Pin Description
V1 Primary power input
C Common
V2 Secondary power input
C Common
Caution The C terminals are internally connected to each other, but are
functionally isolated from chassis ground. This isolation is intended to prevent
ground loops, but does not meet IEC 61010-1 for safety isolation. You can connect
the C terminals to chassis ground externally. Refer to the specifications on ni.com/
manuals for information about the power supply input range and maximum voltage
from terminal to chassis ground.
If you apply power to both the V1 and V2 inputs, the cRIO-904
x operates from the V1 input.
If the input voltage to V1 is insufficient, the cRIO-904x operates from the V2 input.
The cRIO-904x has reverse-voltage protection.
The following NI power supplies and accessories are available for the cRIO-904x.
Table 6. Power Accessories
Accessory Part Number
NI PS-15 Power Supply, 24 VDC, 5 A, 100-120/200-240 VAC Input 781093-01
NI PS-10 Desktop Power Supply, 24 VDC, 5 A, 100-120/200-240 VAC Input 782698-01
4-Position Gold Power Supply Plugs (Quantity 5) 783529-01
NI 9979 Strain Relief for 4-Position Power Connector 196939-01
SD Card Removable Storage
The cRIO-904x provides an SD card slot that can read from and write to SD cards. The slot
supports SD card interface speeds up to UHS-I DDR50.
Notice Using SD cards that are not approved by NI might invalidate specifications
and result in unreliable performance.
Notice Full and high-speed SD cards are prohibited for use with the cRIO-904x.
The following accessories are available from the SD card slot.
cRIO-904x User Manual | © National Instruments | 9