21 Pin Dcc Decoder Wiring Diagram

By | September 7, 2023

# 21 Pin DCC Decoder Wiring Diagram

A 21-pin DCC decoder is a type of electronic circuit that converts a digital signal from a DCC command station into the analog signals that control the speed and direction of a model train. The 21-pin connector on the decoder is used to connect it to the track power, the motor, and the direction switch. This article will provide a detailed explanation of the 21-pin DCC decoder wiring diagram, including the function of each pin and how to connect the decoder to your model train. ## 21-Pin DCC Decoder Wiring Diagram The following diagram shows the 21-pin DCC decoder wiring diagram: The following table provides a description of each pin on the 21-pin DCC decoder connector: | Pin Number | Function | |---|---| | 1 | Track Power | | 2 | Motor A + | | 3 | Motor A - | | 4 | Motor B + | | 5 | Motor B - | | 6 | Direction Switch A | | 7 | Direction Switch B | | 8 | Function 1 | | 9 | Function 2 | | 10 | Function 3 | | 11 | Function 4 | | 12 | Function 5 | | 13 | Function 6 | | 14 | Function 7 | | 15 | Function 8 | | 16 | Function 9 | | 17 | Function 10 | | 18 | Function 11 | | 19 | Function 12 | | 20 | Function 13 | | 21 | Function 14 | ## How to Connect a 21-Pin DCC Decoder To connect a 21-pin DCC decoder to your model train, you will need to: 1. Connect the track power (pin 1) to the track. 2. Connect the motor leads (pins 2 and 3 for motor A, and pins 4 and 5 for motor B) to the motor. 3. Connect the direction switches (pins 6 and 7 for switch A, and pins 8 and 9 for switch B) to the direction switch. 4. Connect the function outputs (pins 8-21) to the corresponding functions on your model train. Once the decoder is connected, you can program it using a DCC command station. For more information on programming DCC decoders, please consult the documentation for your decoder. ## Conclusion The 21-pin DCC decoder is a versatile and powerful tool that can be used to control a wide variety of model trains. By understanding the 21-pin DCC decoder wiring diagram, you can easily connect the decoder to your model train and start enjoying the benefits of DCC operation. Here are some additional resources that you may find helpful: * [DCC Decoder Wiring Diagrams](https://www.modeltrainstuff.com/dcc-decoder-wiring-diagrams/) * [DCC Decoder Programming](https://www.modeltrainstuff.com/dcc-decoder-programming/) * [DCC Decoders](https://www.modeltrainstuff.com/dcc-decoders/)


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