The K2D4 is an N-scale drop-in decoder designed for Kato and Walthers locomotives. Examples of compatible models include:

Compatible Locomotives

Kato:

• RS2/RSC2
• SD80/SD90MAC

Walthers:

• RS2
• GP18

For a complete list of compatible engines, refer to the installation pages.

Key Features

• Back EMF Load Compensation: Provides superior slow-speed control and high performance under load.
• Quiet Drive: Ensures super-quiet motor control for "buzz"-free motor performance.
• DC Mode: Automatically detects DC power and allows configuration of lighting effects for DC operation.
• RailCom®: Enables the decoder to communicate with the command station and supports future feature expansion.
• Variable Momentum: Allows customization of acceleration and deceleration curves.
• LED Support: No external resistors are required when connecting LEDs.
• Incandescent Bulb Support: Compatible with 12-volt bulbs.
• Function Remapping: Buttons 0 through 12 can be used to control the lighting functions.
• Programmable Lighting Effects: Offers 20 separate user-programmable lighting effects.
• Dimmable Brightness: Configure multiple brightness levels for LEDs or incandescent bulbs.
• Decoder Lock: Prevents accidental or unwanted programming when activated.
• Airwire™ Compatible: Fully supports Airwire™ operation.
• User-Loadable Speed Tables: Allows you to configure custom speed curves and set speed limits.

Additional Notes

The K2D4 features copper tabs that slip over the motor contacts on the locomotive, ensuring a secure and reliable connection.