Introduction
The LAX2000 E3 is a microcontroller-based speed cum energy recorder designed exclusively for Electric locomotives and Electric multiple units (EMU). It monitors crucial locomotive parameters with high reliability and accuracy, providing real-time data to the operator. The recorded data is vital for post-incident analysis and monitoring the performance of the locomotive driver. The system includes audio-visual alarms on deviations from specified parameters to trigger immediate corrective actions.
System Overview
The LAX2000 E3 operates using signals generated from the speed sensor mounted on the axle along with dynamic braking and coasting. The microcontroller computes and records speed, distance and energy parameters continuously to inbuilt memory and an external memory card. The system also features communication between the Master and slave units located at driver cabs using RS485 protocol. The unit includes an LCD display, keypad, and provides audio-visual alerts when specified parameters deviate from acceptable values.
Variants
| Variant | Description |
| LAX2000-D3 | Diesel Locomotives Model |
| LAX2000-D8 | Diesel Locomotives Model |
| LAX2000-E1 | 8 hours of 1-sec data, 45 days of 20-sec interval data, downloadable via RS232 port |
| LAX2000-E2 | 12 hours of 1-sec data, 120 days of 30-sec interval data, downloadable via Compact Flash Card |
| LAX2000-E3 | Similar to LAX2000-E2 with Pen Drive Downloading and Graphical Display functionality |
Salient Features
| Feature | Description |
| Accuracy & Reliability | Highly accurate, stable, and reliable microcontroller-based system |
| Self-diagnostic & Fail-safe | Self-diagnostic system with fail-safe operation for enhanced reliability |
| Power Supply | Operates on 50V to 140V DC, suitable for Indian railway locomotives (24V DC available per customer need) |
| Protection | Built-in protection for reverse polarity, over-voltage, over-current, short circuit; EMI/EMC suppression |
| Redundant Data Recording | Data recorded in non-volatile memory at two locations for redundancy |
| Memory Storage | Industrial-grade compact flash card used for memory recording |
| Data Recording | 12 hours of 1-second data and 120 days of 30-second interval data |
| Display | OLED graphical display with wide viewing angles for durability and longevity |
| Speed Measurement | Auto-changeover redundant speed sensors |
| Energy Measurement | 0.5 class energy measurement using industry-standard energy ASIC |
| Odometer & Energy Meter | 7-digit odometer (1 km resolution) and 8-digit energy meter (1 KWh resolution) |
| User Configurable Parameters | Configurable parameters through keypad |
| Data Download | Data can be downloaded using Pen Drive, Compact Flash Card, and RS232 port |
| Graphical Data Representation | Speed vs. Distance, Speed vs. Time, Energy vs. Time, and Energy vs. Distance graphical analysis |
| Over-speeding Analysis | Over-speeding analysis available in the analysis software |
| Software Export | Downloaded data can be converted to Excel file format |
Technical specification
| Parameter | Details |
| Power Supply Voltage | 50V to 140V DC from loco battery (24V DC available per customer requirement) |
| Power Consumption | Less than 12 Watts |
| Accuracy of Speed | 0.8% of full scale |
| Speed Dial | 0-180 Km/h or customer-specific (240 degrees) |
| Odometer | 7-digit, 1 km resolution, Accuracy: 0.1% |
| Speed Measurement | Through auto-changeover redundant speed sensors |
| Energy Accuracy | 0.5 class using industry-standard energy ASIC |
| Energy Counter | 8-digit, 1 KWh resolution |
| Recording System | Dual-location recording using industrial-grade compact flash card |
| Resolution of Recording | 1 second for 12 hours of fine data; 30 seconds for 120 days of coarse data |
| Display | 2 x 16 character LCD display with backlit control |
| Display Parameters | Time, Date, Distance, Energy, Voltage, Current, Power Factor, Dynamic Braking, Tractive Effort, etc. |
| Temperature Range | -5°C to +80°C |
| Data Entry | 16-key rugged tactile alphanumeric keypad |
| Wheel Diameter Setting | Adjustable through keypad (640mm – 1220mm or customer-specific) |
| Digital Inputs | 2 x 110V DC digital inputs (Optically isolated, reverse polarity protected); expandability optional |
| Digital Outputs | 5 relay outputs (expandable as per customer requirement) |
| Data Downloading | RS232 or Compact Flash card |
| Approximate Weight | Recorder cum Indicator unit: < 3 Kg, Indicator unit: < 2.5 Kg |
| Analysis Software | Windows-based, powerful, and user-friendly software |
