User Power
The following table describes the user voltage rails for powering external sensors and
peripherals. The rails are independent from the power supplies of internal systems, such as the
processor and memory.
Table 1.
NI roboRIO Voltage Rails
Voltage Rail
Description
+6 V
Power from PWM ports for use with servos.
+5 V
Power for DIO and AI ports for sensors, and power for the MXP for powering
expansion circuits.
+3.3 V
Power for I
2
C, SPI, and the MXP.
Input Voltage Brownout Behavior
The NI roboRIO input voltage range is 7 V to 16 V. The input voltage monitoring circuit
monitors the voltage on the input voltage pin. When the input voltage drops to between 4.5 V
6
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NI roboRIO User Manual
