Dual-Mode LED Headlight Driver Card for Rolling Stock 

OHE High Voltage Presence Absence detection and indication system
  • The LED Headlight Driver Card for Rolling Stock is a smart, durable, and energy-efficient lighting driver designed specifically for railway and metro applications. It powers high-intensity LED lamps with selectable High Beam and Low Beam modes, offering the perfect balance between visibility and power savings.
  • Furthermore, with a wide operating range of 55 V DC – 120 V DC, this driver ensures stable performance even under fluctuating supply conditions common in rolling-stock systems. In addition, the design includes reverse polarity and surge protection, making it highly reliable for harsh railway environments.
  • Moreover, the driver’s brightness is fully configurable, allowing operators to customize illumination levels to suit ambient light conditions or operational preferences. Built-in relay-based indicators provide clear feedback for beam selection and power status, supporting both onboard diagnostics and external control systems.
  • Ultimately, the LED Beam Driver Card is compact, robust, and maintenance-friendly. Therefore, it is ideal for use in locomotive headlights, marker lamps, signal indicators, and auxiliary lighting assemblies—delivering consistent performance, safety, and long-term reliability trusted by modern railway fleets.

Specifications

Input Supply Voltage
  • 55 V DC to 120 V DC
  • Nominal rolling-stock supply range; suitable for 72 V / 110 V DC systems
Input Current
  • 50 mA – 500 mA
  • Current drawn varies with LED panel configuration and selected beam mode
Polarity Protection
  • Provided
  • Reverse-polarity protection to prevent damage due to wiring reversal
Surge / Transient Protection
  • Provided
  • Meets rolling-stock transient immunity requirements
Control Inputs
  • Separate HIGH / LOW beam lines
  • Independent external control for beam selection
Output Voltage Range for LED
  • 5 V DC – 60 V DC
  • Supports wide LED string configurations
Output Current
  • 1 A
  • Designed for high-intensity LED modules used in railway headlights
Beam Modes
  • High / Low
  • High-beam = full current; Low-beam = reduced current or PWM dimming
Output Isolation
  • Non-isolated (common ground)
  • LED load shares common ground with input supply
Indicator Outputs
  • Relay-based outputs
  • Potential-free contacts for external indication of Beam or Power status
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