The Digitrax SNABC is a complete turnout signalling kit in N scale. A turnout takes three signals to do properly - a dual-head mast facing the points that shows both routes, plus single-head masts covering each leg beyond - and the kit includes all three along with the mounting board, plugs and hardware. Current-limiting resistors are already fitted, which matters more in N scale where the LEDs are small and unforgiving.
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What is the difference between this and a mainline kit?
A turnout needs three signals: a dual-head mast protecting the points and showing both routes, plus single-head masts for each leg beyond. A mainline kit only covers plain double track.
Is this the N scale version of the SHABC?
Yes. Same configuration and the same contents, with signal heads scaled for N.
Do I need anything else to make the signals work?
Yes - a signal decoder to drive the aspects (the SE8C is the intended partner), cabling to reach the masts such as the SDCK kit, and some form of block occupancy detection.
Do I need to add resistors?
No. Current-setting resistors are already on the mounting board, so there is no resistor maths and no risk of over-driving an LED.
