Refined Control

Expand upon your robot's capabilities with the REV ION Control System. This series of Hubs and Modules provide flexibility for the addition of new peripherals while delivering vital feedback back to the team. Seamlessly integrate a Hub into your CAN Bus alongside the SPARK MAX or SPARK Flex Motor Controllers.

Power Management

Power Distribution Hub

The REV Power Distribution Hub (PDH) is the latest evolution in power distribution for the FIRST Robotics Competition (FRC). With 20 high-current (40A max) channels, 3 low-current (15A max), and 1 switchable low-current channel, the PDH gives teams more flexibility for overall power delivery. The Power Distribution Hub features toolless latching WAGO terminals, an LED voltage display, and the ability to connect over CAN or USB-C to the REV Hardware Client for real-time telemetry, making it easier than ever to wire and debug your robot.

Radio Power Module

The REV Radio Power Module is designed to keep one of the most critical system components, the OpenMesh OM5P-AC WiFi radio, powered in the toughest moments of the competition. Traditional barrel jacks easily work themselves loose and often require hacks, like hot glue, to prevent intermittent power losses. The Radio Power Module eliminates the need for powering the radio through a traditional barrel power jack. Utilizing 18V Passive Power over Ethernet (PoE) with two socketed RJ45 connectors, the Radio Power Module passes signal between the radio and roboRIO while providing power directly to the radio. After connecting the radio and roboRIO, easily add power to the Radio Power Module by wiring it to the low-current channels on the Power Distribution Hub utilizing the color coded push button WAGO terminals.

The REV Mini Power Module (MPM) is a compact power distribution module that allows you to securely and quickly power peripheral devices to your robot. Need more low-current channels on your PDH? Wire the MPM to one of the high-current channels on the PDH to power more peripheral devices and custom circuits.

The REV Pneumatic Hub is a standalone module that is capable of switching both 12V and 24V pneumatic solenoid valves. The Pneumatic Hub features 16 solenoid channels which allow for up to 16 single-acting solenoids, 8 double-acting solenoids, or a combination of the two types. The user-selectable output voltage is fully regulated, allowing even 12V solenoids to stay active when the robot battery drops as low as 4.75V.

Digital and analog pressure sensor ports are built into the device, increasing the flexibility and feedback functionality of the pneumatic system. The USB-C connection on the Hub works with the REV Hardware Client, allowing users to test pneumatic systems without a need for an additional robot controller.

The REV Potentiometer (REV-31-1155) converts the angular position of a shaft into an analog voltage signal. A potentiometer acts as an adjustable resistor, fluctuating resistance as the shaft is turned. As the wiper (the knob) moves up and down along the coils of the resistor and the resistance and voltage output change proportionally at each new position.‌

This page contains a wiring diagram for the Radio Power Module with the Vivid Hosting VH-109 FRC radio, along with a few crucial notes to consider for the electrical protection of the radio.

FRC Radio Wiring Diagram

The REV Robotics Color Sensor V3 is a combined color and proximity sensor. From a single sensor you can measure colors and rough distances to various targets. Version 3 introduces a new sensor chip from Broadcom due to the end-of-life of the V1/V2 color sensor chip.

The REV Robotics 2m Distance Sensor (REV-31-1505) uses the ST Microelectronics VL53L0X Time-of-Flight (ToF) laser-ranging module to measure distances up to 2m with millimeter resolution.

Unlike other ranging sensors that rely on the intensity of reflected light, this sensor can measure how long it takes for the light to bounce back, the “time of flight.” This results in much more accurate measurements that are independent of the target’s reflectance.

The REV Robotics Magnetic Limit Switch (REV-31-1462) is a three-sided digital hall effect switch. The three internal hall effect elements (one on top, two on the sides) are connected in parallel so if any one of them is triggered the sensor will report as triggered.

Hall effect sensors detect the presence of a magnetic fields. The REV Magnetic Limit Switch is an omnipolar momentary switch; it will trigger when there is sufficient field strength of either magnetic pole detected.

Input Status LED

Welcome to your new Pneumatic Hub from REV Robotics! This documentation is intended to answer any questions related to the Pneumatic Hub (PH) used in the FIRST Robotics Competition. If there is a question that is not answered by this space, send our support team an email at support@revrobotics.com. We are happy to help point you in the right direction!

• Have a specific question? Feel free to head straight to it using the navigation bar to the left. Each section is grouped with other similar topics.

• Have trouble finding what you are looking for? Try the search bar in the upper right!

Welcome to your new Power Distribution Hub from REV Robotics! This documentation is intended to answer any questions related to the Power Distribution Hub (PDH) used in the FIRST Robotics Competition. If there is a question that is not answered by this space, send our support team an email at support@revrobotics.com. We are happy to help point you in the right direction!

• Have a specific question? Feel free to head straight to it using the navigation bar to the left. Each section is grouped with other similar topics.

• Have trouble finding what you are looking for? Try the search bar in the upper right!

The REV Radio Power Module (REV-11-1856) is designed to keep one of the most critical system components, the OpenMesh OM5P-AC WiFi radio, powered in the toughest moments of the competition. Traditional barrel jacks easily work themselves loose and often require hacks, like hot glue, to prevent intermittent power losses. The Radio Power Module eliminates the need for powering the radio through a traditional barrel power jack. Utilizing 18V Passive Power over Ethernet (PoE) with two socketed RJ45 connectors, the Radio Power Module passes signal between the radio and roboRIO while providing power directly to the radio. After connecting the radio and roboRIO, easily add power to the Radio Power Module by wiring it to the low-current channels on the Power Distribution Hub utilizing the color coded push button WAGO terminals.

• 18V Passive Power over Ethernet (PoE)

The REV Mini Power Module (MPM) (REV-11-1956) is a compact power distribution module that allows you to securely and quickly power peripheral devices to your robot. Need more low-current channels on your PDH? Wire the MPM to one of the high-current channels on the PDH to power more peripheral devices and custom circuits.

• 6 Output Channels

  • ATM Fuse Protection

Utilizing 18V Passive PoE with two socketed RJ45 connectors, the Radio Power Module passes signal between the radio and roboRIO while providing power directly to the radio. Connect an ethernet cable into each end of the Radio Power Module, connect the NI roboRIO port to the roboRIO, then connected the Wi-Fi Radio Power port to the radio. Once the Radio Power Module is connected, add power through the low-current channel on the Power Distribution Hub.

The MAXSpline Encoder delivers high accuracy and robust performance while integrating seamlessly with the MAXSpline ecosystem. Using the same proven magnetic sensing architecture as the Through Bore Encoder V2, this model adds expanded connectivity through both ABI quadrature and CAN communication, giving teams more flexibility in how they collect and route sensor data. Its on-axis MA600 magnetic configuration ensures reliable readings even in environments where optical encoders struggle, and its ±0.5 degree calibrated accuracy supports precise control for a wide range of competitive robotics applications.

Designed specifically for MAXSpline shafting, the encoder’s through-bore profile enables clean, compact integration directly over the shaft. The housing incorporates a combination of through holes and castellated #10-32 mounting points, all aligned to the standard 0.5in ION system pitch. This allows teams to mount the encoder in multiple orientations: parallel to nest within the profile of a 2x1 MAXTube, perpendicular for offset encoding, or even attached directly to MAXSpline Shaft Bearing Blocks and pattern plates. The result is a highly adaptable mechanical interface that supports creative layouts without requiring custom spacing or nonstandard hardware.

A dedicated Molex Micro-Fit+ connector provides power and CAN access for teams who want to bypass traditional sensor cabling to motor controllers, while the JST-PH port continues to support incremental and PWM absolute outputs. Two diffused edge-lit status LEDs allow users greater feedback at various viewing angles. With built-in magnet, factory zero calibration, and multiple connection pathways, the MAXSpline Encoder offers a versatile and competition-ready sensing solution.

• Adds new status period get/set commands

• Fixes issue where updating from other firmware versions will reset the CAN ID

• Adds the ability to adjust the absolute position output (period, minimum high time, minimum low time)

The REV Through Bore Encoder is specifically designed with the end user in mind, allowing teams to place sensors in the locations closest to the rotation that they wish to measure. This rotary sensor measures both relative and absolute position through its ABI quadrature output and its absolute position pulse output.

The REV Robotics Touch Sensor () is a digital sensor that can be used as a button input or as a basic mechanical limit switch. The touch sensor is similar to a keyboard button, when the button is pressed the touch sensor notifies the Robot Controller and an action in the code is triggered. Sometimes this action may stop the motors or reset the encoder angle, depending on the use case.

Like all digital sensors, the Touch Sensor acts on a binary. When the button is not pressed, the LED light remains unlit and the value read by the Expansion Hub is 3.3V (high) and when the button is pressed the LED will light and the Expansion Hub will read 0V (Low)

The is a compact, all-in-one solution that can control LEDs in a stand-alone mode with just a 12V power source or in a dynamic mode, changing patterns by supplying a standard servo-style PWM signal.

The Digital LED Indicator (REV-31-2010) is a LED signal module that is digitally controlled (active low) and offers three colors: red, green, and amber. The Digital LED Indicator is designed to directly interface with the DIO ports of the Control Hub and Expansion Hub. When using the Digital LED Indicator outside of the REV Hub environment, make sure to check that your device GPIO pins’ current sink rating can handle 20mA.

The REV Servo Power Module is a 6V 90W power injector that enables the use of standard servos in applications where a robot controller cannot provide adequate power. The following Quick Start Guide describes the Servo Power Module features and the necessary information to get it up and running.

Power Distribution Hub Wiring Diagram

Latching WAGO Terminals: Battery Input and High-Current Channels

• For Battery Input use 18 to 4 AWG Wire, Stripped back ~0.75” (20mm)

• For High-Current Channels use 24 to 8 AWG Wire, Stripped back ~0.5” (12mm)

• Flip open the lever with an upward motion.

  • You can open the lever all the way to have it stay open or you can open it half way for quick wire changes.

• Insert stripped wire into connector opening.

• Push down the lever.

• Test the wire by giving it a smart tug to ensure wire is connected securely.

• Use 24 to 18 AWG Wire, Stripped back ~0.35” (8mm)

• Press and hold down connector button.

• Insert stripped wire into connector opening.

• Carefully insert the Circuit Breaker (CB) directly into the circuit breaker holder. Ensure that the blades of the circuit breaker slide into the circuit breaker holder.

• Circuit breakers should not be loose or move at all when inserted correctly.

  • If the circuit breaker is loose, remove the circuit breaker and make sure you can see the opening on the circuit breaker holder, then reinsert into the holder.

• When removing a circuit breaker, make sure to rock the circuit breaker back and forth to make it easier to pull up on.

The REV Power Distribution Hub (PDH) (REV-11-1850) is the latest evolution in power distribution for the FIRST Robotics Competition (FRC). With 20 high-current (40A max) channels, 3 low-current (15A max), and 1 switchable low-current channel, the PDH gives teams more flexibility for overall power delivery. The Power Distribution Hub features toolless latching WAGO terminals, an LED voltage display, and the ability to connect over CAN or USB-C to the REV Hardware Client for real-time telemetry, making it easier than ever to wire and debug your robot.

Features

• 20 High-current channels

  • All supporting up to 40A

  • Supports ATO size breakers and fuses

• 3 Low-current channels

  • Supports up to 15A continuous, 20A peak for approved pneumatic control devices.

  • Supports ATM/APM size breakers and fuses

• 1 Switchable low-current channel

  • On/off control useful for LEDs and other indicators

  • Supports up to 15A continuous

• Toolless and color-coded WAGO terminals for all main connections

  • Main power input - latching WAGO 2616 series

  • High-current channels - latching WAGO 2606 series

• Advanced debugging features

  • Channel status LEDs for breaker status and fault feedback

  • LED input voltage display

• CAN connectivity

  • Channel telemetry feedback to main robot controller

  • Configurable CAN termination on device

• USB-C connectivity

  • USB-to-CAN device allowing for monitoring and updating devices on the CAN bus

  • Update and diagnose faults with the REV Hardware Client

• ESD protection

The REV Pneumatic Hub (REV-11-1852) is a standalone module that is capable of switching both 12V and 24V pneumatic solenoid valves. The Pneumatic Hub features 16 solenoid channels which allow for up to 16 single-acting solenoids, 8 double-acting solenoids, or a combination of the two types. The user-selectable output voltage is fully regulated, allowing even 12V solenoids to stay active when the robot battery drops as low as 4.75V.

Digital and analog pressure sensor ports are built into the device, increasing the flexibility and feedback functionality of the pneumatic system. The USB-C connection on the Hub works with the REV Hardware Client, allowing users to test pneumatic systems without a need for an additional robot controller.

Features

• 16 solenoid channels

  • 16 single-acting or 8 double-acting channels

  • Fully integrated user-selectable 12V or 24V solenoid output

• Pressure sensor inputs

  • 1 Digital pressure switch input

  • 2 Analog pressure sensor inputs

• CAN connectivity

  • Channel telemetry feedback to the main robot controller

• USB-C connectivity

  • USB-to-CAN device allowing for monitoring and updating devices on the CAN bus

  • Update and diagnose faults with the REV Hardware Client

• Channel status LEDs indicate channel state and faults

• Reverse polarity protection

• Overcurrent protection

• ESD protection

REV Robotics custom ATO Auto-resetting Breakers are designed to give reliable protection for FRC robot actuators. These custom developed breakers are ATO sized, adhere to SAE Standard J553, and will give consistent performance even after hundreds of breaker trips. A color-coded anodized aluminum case and stamped ratings allow for easy identification and inspection.

Within the FRC community, there is a common misconception that circuit breakers are designed to trip exactly at a specified current value to protect the devices connected to your Power Distribution Hub. However, a more accurate description would be that circuit breakers are designed to trip at a specific temperature after a set amount of time to protect the electrical system from fire or other electrical hazards.

The current rating on a circuit breaker is the specification of the maximum current at which the circuit breaker is guaranteed not to trip. It is theoretically possible to see a 200% overload for greater than 1 second before it trips. Datasheets for the two most common breakers used with motors in FRC, the and the 40A Snap Action MX5 Breakers, show the 40A breakers can see 80A flow through for a short period before they trip.

The CAN Terminator Pack provides two compact, plug-ready termination options. Each terminator uses a small 10mm x 10mm internal circuit board sealed with heatshrink and contains a dedicated 120-ohm terminating resistor, ensuring proper end-of-line signal integrity on any CAN network. The pack includes both a receptacle-side terminator and a pin-side terminator, making it easy to cleanly finish a CAN run no matter which connector style is present at the endpoint.

Specifications

Version 26.1.3

• Fixes USB compatibility for Mac

Version 26.1.2

• Fixes bug preventing updating downstream SPARK devices

Version 26.1.1

• Improves performance of USB bridging

Version 26.1.0

• Fixes bug preventing proper communication with downstream SPARKs

• Updates the bootloader. This update must be done via DFU.

• Switches the USB CAN bridging to use SLCan

  • Note: Devices that use SLCan are NOT compatible with REV Hardware Client when used over USB. Devices running v26.x.x+ can only be used via REVUI, or downstream of a REV CAN device running v25.x.x or lower with RHC.

• Fixes communication with a downstream SPARK device on the latest Hardware Client

• A Power Hub with 12V power connected via USB only no longer reports a CAN Fault

• Adds LED code for Low Battery

NOTE: Upgrading from v22.x.x to this version will clear sticky faults.

• Fixes issue where a hardware fault may be set when the device experiences a brownout

• Improves device brownout detection

• Improves breaker fault detection

• Improves CAN fault detection

• Fixes issue where PDH will sometimes fail to update downstream devices via CAN

• Improves accuracy of battery voltage reading

• Improves hardware fault reporting

• Improves switchable channel LED behavior

• Blinks the status LED blue when sticky faults are successfully cleared via the MODE button

• Fixes certain faults that were incorrectly triggered when the device was only powered via USB

• Persists sticky faults across power cycles

• Allows sticky faults to be cleared by holding down the MODE button

• Updates LED patterns

• Turns off the switchable channel LED when the switchable channel is turned off

This JST-PH 6-pin Breakout Board is designed to adapt external sensors to the SPARK MAX 6-pin Encoder Port standard. It features a JST PH 6-pin connector, labeled solder pads, and through-hole pads that are compatible with popular 63R style quadrature encoders. This breakout makes it easy to connect external encoders to the SPARK MAX when running in Brushed Mode.

Specifications

These JST PH 6-pin Joiner Boards are intended to be used with the JST PH 6-pin Extension Cables to extend the reach of your NEO Brushless Motor sensor cables.

Specifications

• Fixes USB compatibility for Mac

• Fixes bug preventing updating downstream SPARK devices

• Improves performance of USB bridging

The MAXSpline Grommet provides a simple way to route wires through while preventing abrasion against bare aluminum. Made from pliable 60A rubber, it press-fits into the MAXSpline Bore on MAXTube with a 1/8 inch wall, creating a clean pass-through point that protects your wiring in any build.

MAX Pattern Tubing makes wire management simple, but the sharp edges from the pattern holes can tear up your CAN/PWM cable's sheathing. MAX Grommets are easy to install and allow smooth pass-through.

Grab your grommet and line the spline teeth into the grooves. Start working the lip of the grommet around the teeth so that it covers the gaps.

Double-check that both lips of the MAX Grommet are covering all sharp edges from the pattern hole. Now you can safely move your wires without worry.

The REV POE Injector Cable was specifically designed to address a common problem for many FRC teams with their wireless radios: intermittent power glitches.

The wireless radios used in the last several FRC seasons can be powered either through a traditional barrel jack or through a Power Over Ethernet (POE) port. Traditional barrel jacks can easily work themselves loose and often require hacks like hot glue to prevent intermittent power glitches. The REV POE Injector Cable eliminates the barrel jack by providing power directly to one of the POE ports on the radio. Two power wires branch off of the male end of the cable and can be connected to an appropriate power source like the Voltage Regulator Module (VRM). These power wires come crimped with ferrules that are compatible with the Weidmuller connectors on the VRM.

The Pneumatic Hub is powered off of one of the three Power Distribution Hub side channels (not the switchable side channel) and can be wired into the CAN bus using the yellow and green channel ports.

It's recommended to use a 20A circuit breaker on the low-current channel where the Pneumatic Hub is wired.

• Use 24-16 AWG Wire, Stripped back ~0.375” (9mm)

If you are experiencing issues with your Pneumatic Hub that you are struggling to diagnose, we recommend following the troubleshooting guides and steps listed below, both in the flowchart and in the following subsections.

View Active Faults and Sticky Faults on your Pneumatic Hub by connecting it to the . Under the Device Faults section you will see two columns, one for Active Faults and one for Sticky Faults.

Sticky faults are cleared when the mode button on the Power Distribution Hub is pressed or can be cleared using the REV Hardware Client. It is also possible to clear sticky faults using WPILib.

To activate Compressor Test Mode, please follow these steps:

General Status LED

Compressor Status LED

Solenoid Status LED

The following tables provide the operating and mechanical specifications for the Mini Power Module (MPM).

Below you will find information on how to download and install REVLib for LabVIEW, Java, and C++.

The most common Power Distribution Hub troubleshooting issues are listed below. After reading through, if you still have questions or need additional help, reach out to us at: support@revrobotics.com

Most Common Issues

If you are experiencing issues with your Power Distribution Hub that you are struggling to diagnose, we recommend following the troubleshooting guides and steps listed below, both in the flowchart and in the following subsections.

If unable to remove Circuit Breakers from your PDH by using , we recommend using a PDH Breaker Extractor.

When updating the firmware on the Power Distribution Hub, it is possible for the process to be interrupted or for the firmware to be corrupted by a bad download. In this state, the Status LED will be dark or dim and the Power Distribution Hub will fail to operate. There is a built-in recovery mode that can force it to accept new firmware even if the controller seems to be bricked and the procedure is outlined below:

Please note, that performing this procedure will erase all data and settings on the device. To perform the procedure a small tool, like a straightened paper clip is necessary to press the Mode Button (located close to the LED status light), the orange USB-C cable that came with the unit (or a DATA capable USB-C cable), and a native Windows based computer with the installed:

1. With the Power Distribution Hub powered off, press and hold the Mode Button

2. While still holding the Mode Button, connect the Device to the computer using the USB-C cable -the Status LED will not illuminate - this is expected.

3. With the REV Hardware Client running on the computer, wait a few seconds for the audible tone or icon for the device to be recognized in recovery mode then release the Mode Button - no lights will be present on the Power Distribution Hub during this stage of the process, this is expected

The following tables provide the operating and mechanical specifications for the Radio Power Module.

The following tables provide the operating and mechanical specifications for the Pneumatic Hub.

Main Electrical Specifications

The following tables provide the operating and mechanical specifications for the Power Distribution Hub (PDH).

Main Electrical Specifications