DCC Accessory Decoder Information



Accessory decoders (also known as Stationary Decoders) are used to control features such as point motors, signals and lighting.  The majority of DCC systems use accessory addresses to control these decoders.  There seems to be a number of different names for this addressing system such as: Solenoid addresses, Turnout addresses, Point Addresses and Switching addresses.  On DCC Compliant systems, these addresses are independent of Locomotive addresses so there are no clashes.  

Whilst some accessory decoders can be used with a large range of different DCC systems (Lenz LS100 and LS150 are good examples of this) some accessory decoders have design features that tie them to their parent system (Uhlenbrock 63410 LocoNet Switch Module - this is and excellent multi-purpose accessory decoder with 20 outputs.  It doesn't rely on signals sent to the layout tracks, but uses the LocoNet cabling system to recieve all of its commands - This however means that it needs to be controlled by a Uhlenbrock LocoNet command station).

I will cover accessory decoders in the separate Lenz, Uhlenbrock and Roco sections.

Quick Links for accessory decoder information:  Lenz LS150    Lenz LS100   Roco 10775     Uhlenbrock 63410 and MD2 

The following is the convention for using accessory addresses:

Lenz System

+ Key  Switch accessory on , set point to straight, set signal to green

- Key  Switch accessory off , set point to curved, set signal to red

Uhlenbrock System

Green Key  Switch accessory on , set point to straight, set signal to green

Red Key  Switch accessory off , set point to curved, set signal to red

The convention just allows you to wire every accessory in the same manner which will make the accessories quicker and easier to control on the finished layout.  If you find that your accessories are not responding in the same manner then just swap over the wires at the accesory decoder.

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