DF-3 Micro-Controller Detector/Flasher/Gate Driver

DF-3 Micro-Controller Detector/Flasher/Gate Driver

Details:

The DF-3 is a microprocessor controlled bi-directional grade crossing controller designed for advanced model railway signalling and automation. Using proven digital current sensing detection, it reliably identifies powered locomotives and illuminated rolling stock without introducing a significant voltage drop to the track. Fully compatible with AC and DCC systems, the DF-3 is suitable for all model railway scales and delivers precise automated control of level crossing operations even in total darkness.

The DF-3 automatically senses train direction and uses intelligent timing logic to activate outputs correctly for both Eastbound and Westbound movements. When installed with properly isolated track sections, it provides smooth and realistic grade crossing operation.

The DF-3 includes alternating lamp flasher outputs capable of driving up to 250mA per side, ideal for realistic railway crossing signals. An accessory output terminal is also provided, suitable for controlling external devices such as relays or bell ringers, also rated up to 250mA. In addition, a dedicated gate drive output can directly operate up to two Tortoise Slow Motion Switch Machine units configured for crossing gate movement, with adjustable gate motor speed for fine tuned realism.

The unit requires a 10–18V DC power supply and is mounted on a compact printed circuit board designed for easy installation. It is intended for use with isolated track sections consisting of Eastbound and Westbound approach blocks plus a central island section for accurate detection and control.

Features:

• Bi-directional control with automatic direction sensing
• Reliable current sensing detection for locomotives and lighting
• Multiple outputs for signals, accessories, and gate motors

Additional Information:

• Power requirement: 10–18V DC
• Detection method: Digital current sensing
• Track compatibility: AC and DCC systems
• Operating capability: Fully functional in total darkness
• PCB size: 3” x 3” (76.2 mm x 76.2 mm)
• Output rating: Up to 250mA per flasher/accessory output
• Gate drive output: Supports up to 2 Tortoise switch machines
• Direction sensing: Automatic bi-directional detection

Measurements:

• Length: 76.2 mm
• Width: 76.2 mm