These two pieces (HP100 and DCC100) are required for any configuration.
You must then add one or two “layout” modules of your choice.
3) Layout modules
On an HP100 board, you can insert only one Layout Module, or two identical modules, or two different modules. The wide versatility allows you to adapt to what you want to drive.
With two Layout Modules you can, for example, drive up to 8 different switches, or 4 switches and 4 signals. If you have fewer devices, you can drive only four using one module and save money.
The available modules are: