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Logic Rail offers three main modules for Prototypical Signaling: the SignalMaster that detects and signals up to 8 blocks with 2- and 3-color signals, the BlockMaster that detects and signals two blocks with 2- and 3-color signals, and the searchlight Master used in conjunction with the SignalMaster to convert its 3-color signal outputs to 3-color target (searchlight) signals using single 2-color LEDs - BlockMaster doesn't need SignalMaster.

Note: Unless you already know how signaling is supposed to work, and know how you will block your layout and place your signals, you will have a fair amount of learning to do to use these or any other "prototypical" signal controllers. Fortunately, Logic Rail provides a tremendous amount of signaling information with their products. Just be prepared to study up before you start work on signaling your layout.