Power Supply (roboRIO Toolkit)

LabVIEW 2015 roboRIO Toolkit Help

Edition Date: June 2015

Part Number: 374999A-01

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The following types of power supplies are necessary for using the roboRIO:

  • Power supply for the roboRIO
  • Power supply for peripheral devices

Power Supply for the roboRIO

You need to connect an external power supply to the roboRIO. The power supply provides the power for the roboRIO I/O channels and the onboard devices.

Note  The power supply voltage for the roboRIO to properly work ranges from 7 V to 16 V.

Use the COMBICON power connector that ships with the roboRIO to connect the power supply to the roboRIO. The following figure shows the COMBICON power connector.

The following list describes important details about the previous figure:

The terminal screws secure the wires in the screw terminals.
The connector screws secure the power connector on the front panel of the roboRIO.

Wiring Power to the roboRIO

Complete the following steps to connect a power supply to the roboRIO:

Caution  Turn off the power supply before you install or remove the power connector from the roboRIO.
  1. Connect the positive lead of the power supply to the V terminal of the power connector and tighten the terminal screw.
  2. Connect the negative lead of the power supply to the C terminal of the power connector and tighten the terminal screw.
  3. Install the power connector on the front panel of the roboRIO and tighten the connector screws.
  4. Turn on the power supply.

Power Supply for Peripheral Devices

When you connect peripheral devices to the roboRIO, the roboRIO works as the master device and supplies power to the peripheral devices.

The roboRIO contains multiple voltage rails because different ports require different power supplies for the peripheral devices. The following table lists the roboRIO voltage rails for powering the peripheral devices.

Voltage Rail Usage
6 V Power from the PWM port for use with servos.
5 V Power from the SPI port.
Power from DIO and ANALOG IN ports for sensors.
Power from the MXP port for powering expansion circuits.
3.3 V Power from SPI, I2C, and MXP ports.

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