PX4IO Airplane/Rover Servo and I/O Module

PX4IO from top

PX4IO is the Input/Output module for fixed-wing aircraft and rovers with four relays, servo failsafe and manual override.

PX4IO from bottom

  • 24 Mhz Cortex-M3 failsafe microcontroller
  • 7-17V wide supply in, 5V / 2 A output
  • Reverse polarity protection on all power inputs
  • 8 high-speed servo outputs (up to 400 Hz)
  • Futaba S.Bus compatible servo output
  • PPM, Spektrum and Futaba S.Bus compatible receiver inputs (PPM in sum signal format, many compatible receivers, all channels on one connector)
  • 2x 0-40 V, 1 A solid-state relays (MOSFET)
  • 2x 5 V, 500mA current-limited, switched 5V power outputs
  • Analog port with voltage divider (differential pressure sensors)
  • PX4 Expansion bus (stacked on PX4FMU)
  • 50x36x14 mm (1.38×1.97×0.55β€œ), 20g, 30×30 mm M3 mounting

PX4IO v1.3 angle PX4IO v1.3 bottom PX4IO v1.3 top

Where to Buy

Order this module from:

Setup Guide

The Firmware for PX4IO is managed through the Autopilot and does not require any user steps for upgrades / setup. To set the system up, follow the first_steps page.

To upgrade the IO firmware, you must remove any radio modem or other peripheral connected to UART5

Supported Platforms / Airframes

Any airplane / rover or boat that can be controlled with normal RC servos or Futaba S-Bus servos. More details are available on the platforms page.


PX4IO v1.3 overview

Manual and Schematics

Connectors and Absolute Maximum Ratings

The following connectors can be used to make connections between PX4IO and other devices. Note that indicated voltages are ABSOLUTE MAXIMUM RATINGS. Connect only 5V BECs designed to be potentially back-powered to the 5V rail. If powering through the BAT connector (absolutely recommended, its the connector for which a plug with one red and one black cable ships), a 2 cell LiPo, 3 cell LiFePo or 6 cell NiMH / NiCD battery (all cells in series) is in general required to ensure safe operation.

Stacking Spacers

Spacers to stack PX4 boards, are included as part of the 3D Robotics delivery.

  • Between-board spacers (8 mm (5/16β€œ) height): Digi-Key Link for stacking e.g. PX4FMU and PX4IO
  • Below-board spacers (1.6 mm): Digi-Key Link For mounting PX4FMU on the airframe

Jumper Wires

These jumper wires are suitable for the housings below.

Connectors / Housings

To upgrade the IO firmware, you must remove any radio modem or other peripheral connected to UART5

Interface to other PX4 Modules

PX4 Stack viewed from left

The PX4 system has a stacking concept for combining the PX4FMU autopilot-on-module with a carrier board that interfaces to the airframe and provides a stable 5V power supply. This concept allows to have a very customized solution for each type of airframe and still share the same autopilot module. The image on the left shows PX4FMU Autopilot / Flight Management Unit and PX4IO Airplane/Rover Servo and I/O Module stacked as complete fixed-wing/car/boat solution.

Dimensions and 3D Model

Google Sketchup can be used to view and render the highly-detailed 3D model of PX4FMU:

PX4IO with dimensions

EDA Files (Eagle CAD)

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