The SC4 is specifically designed to power and control the new Dapol Servo controlled signals which have three wire inputs for each signal. An SC4 can control one, two or a twin head (e.g. Bracket) servo signal and each can easily be assigned any DCC accessory address & run the two arms independently or together in Home-Distant pairs. It also incorporates a regulated power supply to provide a stable safe voltage for the signals from the standard DCC track supply.
Just connect the 2 power wires and 3 switch wires from the Dapol signal directly to the screw terminals of the controller and then 2 wires from the controller to the nearest piece of DCC powered track or the controller - thats it! No separate power supply or wiring required.
Substitute for Dapol 4A-001-002
Easy and quick to connect, use and setup using One-Touch DCC.
Note that it is very important to only connect Dapol Servo Signals control wires to 'volt free' controllers otherwise permanent damage may result. The SC4 and SC400 have been designed specifically to power and control the new Dapol Servo type OO bracket and O gauge semaphore signals and feature safe optically isolated volt free contacts and a regulated protected power output.