This manual introduces the function and use of PLX Devices R-500 wideband computer.
The PLX R-500 Wideband Computer is a compact dash‑mountable device that measures wideband AFR, EGT, knock, and boost, and offers data‑logging and USB connectivity for engine tuning and diagnostics.
This manual covers safety warnings, installation steps, wiring diagrams, sensor connections, data‑logging inputs, analog outputs, firmware upgrades, technical specifications, warranty information, and recommended PC requirements for the PLX Logger software.
| Power Consumption | 25 W Max, 15 W Typical |
|---|---|
| Operating Temperature | 0 °C to 70 °C |
| Physical Dimensions | 4.75 × 2.25 × 1 in (120.65 × 57.15 × 15.4 mm) |
| CPU | Custom PLX 32‑bit microprocessor |
| Clock Speed | 32 MHz |
| USB Interface | High Speed USB 2.0 |
| Display | 128 × 64 pixel blue‑backlit LCD |
| Analog Outputs | 5 (Configurable AFR, Linear AFR, Narrowband AFR, EGT, Knock) |
| 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 | 2 speed, 4 analog |
| Sampling Rate | 10 samples/s (10 Hz) |
It provides five analog outputs for configurable AFR, linear AFR, narrowband AFR, EGT, and knock.
The device measures 4.75 × 2.25 × 1 inch (120.65 × 57.15 × 15.4 mm).