PLX Devices
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R-300
DIGITAL AIR/FUEL DATA LOGGING COMPUTER
Air/Fuel Ratio Data Loggingt.

  • Works with standalone engine management systems. More Info
  • Accurate Air/Fuel Ratio <0.1, Fast Reaction More Info
  • Advanced Sensor Self Calibration Circuitry. No manual calibration required.
  • Wideband LINEAR Analog Output (0-5V)
  • Narrowband Analog Output (0-1V)
  • Replace your stock Narrowband sensor. More Info
  • 32 MHz Advanced DSP Technology
  • Built in Resettable Fuse (No external fuse needed)
  • Sensor soft start circuitry, prolongs o2 sensor life.
  • Compact and Professional Design
  • "Plug and Play" Installation
  • ISO 9002 Certified Assembly

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Price: $449.00
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R-300 Users Guide     PLX Logger Users Guide    R-300 Interface Diagram

ECU Pinout Database     Application Notes

Ideal For:

Introduction:

The R-300 is a compact, dash mountable, easy to use wideband air/fuel controller with powerful data logging capabilities. Wideband air/fuel ratio can be monitored in numeric, gauge or graphical form. Data logger inputs can be fully customized to display virtually ANY type of data. It's like combining 6 gauges into one! The R-300 can store up to 90 minutes of logged data and 99 individual sessions for later PC download and analysis with PLX Logger PC software.

Key Features:

  1. Measures Wideband Air/Fuel Ratio
  2. Integrated 6 Inputs for data logging (2 Speed, 3 Analog, 1 AFR)
  3. 90 minutes of onboard memory for recording and PC download
  4. Analog outputs for 3rd party interface
  5. Replace your stock narrowband sensor. More Info
  6. Fully customizable LED warning light or shift light
  7. High speed USB 2.0 interface
  8. Powerful 32 bit integrated processor, RAM, and FLASH technologies
  9. 100% backwards compatible with M-Series controllers
  10. Compact dash mountable design (4.75 x 2.25 x 1 inch)
  11. Sensor soft start circuitry, prolongs o2 sensor life
  12. Powerful PC analysis software included (PLX Logger Version 2.1+ Free Download)
  13. Field firmware upgradeable (more features added to R-300 regularly)

Functional Description:

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Wideband Controller Technology

Tech Article: PLX Critical Response Wideband Technology

The R-300 employs the same race-proven wideband controller technologies as our popular M-Series product line. PLX widebands utilize the latest digital PID and DSP technologies to maximize O2 sensor reaction time and accuracy without compromising overshoot, and slow settling response time. Accurate to 0.1 AFR, this technology is coupled with advanced self sensor calibration circuitry and sensor soft start to both prolong the life of your oxygen sensor as well as eliminate any user intervention for manual sensor calibration. Sensor calibration is NOT required; simply “Plug and Play.”

The R-300 can be fully customized to select the specific fuel setting for your application. Fuels with lead are compatible with the Bosch and NTK sensors.

  1. Lambda 1.0
  2. Gasoline 14.7
  3. Diesel 14.6
  4. Methanol 6.4
  5. Ethanol 9.0
  6. LPG 15.5
  7. CNG 17.2

Data Logger Inputs

The R-300 features a built-in 6 input (2 speed, 3 analog. 1 AFR) data logger with 90 minutes of on board memory. The 2 speed inputs can be connected to any signal which gives a pulse (Freq Range: 0Hz-10KHz) and the 3 analog inputs can be connected to any signal which gives a voltage between 0-5V. Analog voltages between 5V-25V will be capped at 5V and will not damage the data logger. This gives the user absolute freedom to interface with various signals to and from your ECU.

Here are a few examples of signals that can be logged by the R-300

Vehicle Speed (MPH/Kmh) Ignition Pulse (RPM) Shaft Speed Sensors PLX G Sensor 
Throttle Position (TPS) MAP Mass Air Flow Sensor Brake Signal
Air Intake Temp (AIT) Engine Coolant Temp (ECT) Exhaust Gas Temp (EGT) PLX Wideband Air/Fuel Ratio

Blue - Speed Signal                Red - Analog Signal

Visit our ECU pinout database for specific vehicle support

Data Logger Onboard Memory/Real-time Streaming

The R-300 can store 90 minutes of data, 6 simultaneous channels and up to 99 individual sessions. Logged data can be uploaded to a PC via high speed USB Port for further analysis with the included powerful PLX Logger software. Serial data can also be streamed via USB port for real-time PC monitoring and recording (same as M-500). Sampling rate is 10Hz for 6 simultaneous channels.

Are you a software developer? Here's the serial protocol

Advanced PC Software Analysis:

The included PC software is both versatile and powerful. Data can be recorded in real-time on the PC or linked with the R-300 to download prerecorded data. PLX Logger (free download) comes with the following key features.

Fully Customizable/Real-time Gauges

Software can be fully customized to display any gauge you wish. The user has the freedom of setting ranges, labels, colors and even background wallpaper! Gauge needles will move in real-time when interfaced with the R-300.

2D Logger

Up to 6 simultaneous input channels can be plotted against time. The user can navigate the 2D logger with cursors, zooming and panning.

3D Logger

Data points can be plotted against 2 other input channels of your choice. RPM, Engine Load and AFR can be plotted in 3D to determine your fuel map characteristics.

3D Rendering

Data from 3D Logger can be rendered giving you a beautiful graphical representation of your 3D Logger table values.

Programmable Warning Light:

Protect your engine from damage with the fully programmable warning light. The R-300 warning LED can be fully customized to activate based on a 1 or 2 variable comparison. For example, you may choose to set the warning light to activate if your throttle position exceeds 50% and your AFR rises above 13.9. You may also setup the warning light as a shift light utilizing a 1 variable comparison.

USB Interface:

Connecting the R-300 to your PC is made easy with an integrated USB 2.0 port. Windows will automatically detect the R-300 as a device each time it is connected to your USB port. Data logged sessions can be downloaded at blazing speeds and analyzed in the pits or comfortably at your home computer.

The R-300 is designed to be extremely portable. Removal to and from your vehicle is made easy and can be done in just a matter of seconds.

M-Series 100% Compatibility:

The R-300 is 100% compatible with all M-Series wideband controller models. All R-Series widebands have outputs for M-Series WB Linear output (0-5V) and M-Series NB output (0-1V) analog signals. The R-Series and M-Series o2 sensor harness are also identical. No rerouting of your existing M-Series o2 sensor harness is required for R-Series connectivity. M-Series o2 sensor harness will plug directly into the R-Series harness. M-Series 52mm gauge is also compatible with R-Series.

R-Series Firmware Reflash Capability:

The R-300 consists of the latest 32 bit microprocessor technologies and has a tremendous amount of processing power. New firmware upgrades with additional features will routinely be available. Every R-Series controller comes with a firmware reflash card. Simply connect one end of the card to the R-Series controller and the other end to your computer's parallel port. Upload the new firmware, reboot and your R-Series wideband controller will be instantaneously better than before.

What does the kit come with?

  1. R-300 dash mountable compact wideband controller
  2. Bosch LSU 4.2 Wideband O2 Sensor
  3. 3ft Bosch O2 Sensor Harness (Controller side)
  4. 8ft Bosch O2 Sensor Harness (O2 sensor side)
  5. 3ft Main Harness (controller side)
  6. 4ft Main Harness (user side)
  7. 4ft Main Harness Power Wires (user side)
  8. USB interface cable (R-300 -> PC connectivity)
  9. PLX parallel port firmware reflash card
  10. Comprehensive operating manual
  11. CD with USB device driver, operating manual in PDF, Latest version of PLX Logger Ver2.1+ (Win95/98/NT/2000/ME/XP) Compatible.