Introduction
Laxven has developed a rugged, multi-functional graphical display system for locomotives designed to function as a human-machine interface. It allows operators to view and investigate various locomotive parameters, control the locomotive, record/retrieve data, and modify user-settable parameters. The system receives data from the locomotive computer or other systems via a communication interface and is suitable for use with Diesel, Electric, Metro, DEMU, and EMU locomotives. The display system is fully assembled in a rugged housing, featuring interface connectors for power and communication cables at the rear.
System Overview
The display system is powered by the DC voltage available in the locomotive, operating within a voltage range of 40V to 140V DC. It records events and fault data based on customer requirements, with the ability to download this data using a USB pen drive. The system features a sunlight-readable LCD display of 10.4 inches with ultra-high brightness and a variety of advanced features, including automatic/manual brightness adjustment, a MIL-grade rugged keypad, and temperature and brightness sensors. It offers two variants to meet specific railway and customer needs: LAX-DIALS-12 and LAX-DDU-14, each developed according to respective specifications and communication protocols.
Salient Features
| Feature | Description |
| Display | 10.4-inch TFT, sunlight-readable, ultra-high brightness (1200cd/m²). |
| High Viewing Angle | 88° on both sides for clear visibility. |
| Fast Boot-up Time | Less than 5 seconds for quick startup. |
| Crash-Proof Operating System | Real-time system unaffected by power interruptions. |
| Fanless Microprocessor System | No need for heat sinks or fans for cooling. |
| Low Power Consumption | <10W at high brightness, <6W at nominal brightness. |
| Brightness Adjustment | Manual or automatic adjustment using brightness sensor. |
| Rugged Keypad | MIL-grade, white backlit, IP65 rated membrane keypad for durability. |
| Environmental Durability | Withstands shocks, vibrations, and temperatures encountered in locomotives. |
| Low Maintenance | Long reliability with minimal maintenance required. |
| Power Supply | Compatible with 50V to 140V DC, suitable for all Indian railway locomotives. |
| Switch Mode Power Supply | Built-in protection for reverse polarity, over-voltage, over-current, and short-circuit. |
| Compliance | Complies with IEC 60571, IEC 61373, and IEC 61000 standards. |
| Communication Interfaces | Ethernet, MVB, RS485, and USB for flexibility. |
| Temperature Monitoring | Built-in temperature sensor with a user-settable cutoff at 75°C. |
| Data Download | Data can be downloaded using a USB pen drive. |
Key Variants
| Variant | Specification and Details |
| LAX-DIALS-12 | Developed according to RDSO specification no. MP.0.0400.10 (Rev-03). Communicates with Siemens S7-300 locomotive computers. Uses Ethernet for data display and recording. |
| LAX-DDU-14 | Developed for 3-phase locomotives as per CLW specification CLW/ES/3/0487. Communicates with the Locomotive VCU via TCN/MVB protocol. |
Technical specification
| Parameter | Details |
| Power Supply Voltage | 40V to 140V DC from loco battery (18V during cranking) |
| Power Consumption | <10W at maximum brightness, typical: 6W |
| EMI/EMC and ESD Protection | As per IEC 60571 and IEC 61000 |
| Other Protections | Reverse polarity protection, short-circuit protection |
| Operating System | Real-time crash-proof operating system |
| Single Board Computer | Quad-core processor with 8GB RAM |
| Display Size | 10.4-inch high brightness LCD display |
| Display Brightness | 1200 cd/m² |
| Display Colours | 16 million colours |
| Display Resolution | 1024 x 768 |
| Keypad | 3 keypads with 28 keys, IP65 rated membrane keypad with white backlighting |
| Storage | Solid-state memory |
| Indications | Bi-color LED (Red & Yellow) |
| Monitoring Hardware | Health monitoring system, brightness sensor, temperature sensor |
| Data Communication Ports | Ethernet, MVB, RS485, USB |
| Data Downloading Ports | USB pen drive |
| Display Brightness Control | Adjustable from 20% to 100% by operator or automatic using sensor |
| Temperature Range | -25°C to +85°C |
| Temperature Cutoff | 75°C (user-settable) |
| Weight of Equipment | Less than 4 Kg |
| Enclosure IP Class | Front: IP65, Rear: IP50 |
Laxven’s multi-functional graphical display system provides a robust and reliable solution for locomotive operators, combining advanced features, a high-quality display, and flexible communication options. With its low power consumption, rugged design, and compliance with international standards, the system is ideal for various locomotive applications, offering ease of use, long-term reliability, and extensive data recording capabilities.
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