TTSC3 DCC Signal Controller Dual Dapol SemaphorThe SC3 controls one or two Original Dual N or OO gauge motorised Dapol semaphore signals by DCC it also incorporates a regulator so that no other power supply is required. Very easy to set up, just choose the accessory address for the signal, press the Learn button on the SC3 and send a command from the controller whichever one you want to set the semaphore in that position. Thats it! The SC3 is now programmed to that address and will always control