This manual introduces the features and characteristics of the R-300 Wideband Computer
This guide introduces the PLX R-300 Wideband Computer, a 32‑bit microprocessor‑based controller with USB interface, data‑logging capabilities, and customizable warning/shift lights. It covers key features, package contents, system requirements, and safety warnings.
Detailed chapters walk through basic hardware layout, wiring diagrams, mounting, sensor installation, data‑logging inputs, analog outputs, technical specifications, and warranty/service procedures.
| Power Consumption | 25 W max, 15 W typical |
|---|---|
| Operating Temperature | 0 – 70 °C |
| Physical Dimensions | 4.75 × 2.25 × 1 in |
| CPU | Custom PLX 32‑bit microprocessor |
| Clock Speed | 32 MHz |
| USB Interface | High‑speed USB 2.0 |
| Display | 128 × 64 pixel blue backlit LCD |
| Warning Light | High‑intensity red LED |
| Analog Outputs | Linear AFR, Narrowband AFR |
| Firmware Upgradeable | Yes |
| External Sensors | O₂ sensors (Bosch LSU4.2, NTK L1H1, L2H2) |
| Useful Lambda Range | 0.68 – 1.36 λ |
| Wideband O₂ Accuracy | < 0.1 AFR (gasoline) |
| Data Logger Inputs | 6 inputs (2 speed, 4 analog, 1 dedicated AFR) |
| Sampling Rate | 10 samples/s (10 Hz) |
It supports six inputs: two speed signals, four analog channels (one dedicated to AFR).
The unit measures 4.75 × 2.25 × 1 inch (120.65 × 57.15 × 15.4 mm).
Yes, the firmware can be upgraded via the USB interface.