• Simplest, most realistic system on the market (Does not require external relays!)
• Easy set-up
• Scale signal structures that have true scale dimensions and details
• Prototype operation circuitry
• Modular design with telephone-style cord connections (for use with multiple signals, sold separately)
• Seamless integration that grows with your railroad
• Designed to be fully compatible with the products offered by Custom Signals, Inc. (www.customsignals.com)

Frequently Asked Questions

Q. What do you need to get started?
A. The number of signals and detector boards you use depends on the size and complexity of your layout. The easiest way to get started is to use the all-in-one pack Type G Single Target Kit, #236 (HO Scale) #2236 (N Scale). More information is available in the manual that comes with the signals.

Q. What does the signal control board (SCB) and the block detector board (BDB) do?
A. The signal control board and block detector board comprise the electronic “brain” of the system. The block detector senses current flow in the block. Installed under the table or mounted under your layout, the control and detector boards are capable of four broad modes of operating options. They control the input from the block detector board and output to the signal target head.

Q. How does the stand-alone signal operation work?
A. The Red and Green are controlled by occupancy. The Yellow is the controlled timed feature in this mode of operation.

Q. Where do I install the signal?
A. The signal is normally placed at the entrance to a block. (A block is any section of track that is electrically isolated from the rest of the layout.)

Q. How do I add integrated signal operation?
A. To add integrated signal operation of two or more signals, plug in the modular Atlas Signal Cable - Item #s 230 (7’), 231 (15’) & 232, (25’), in the length that is appropriate to your block size. Next, plug the cable into a jack, (RJ-11), on the first signal board and into the jack, (RJ11), on the other signal board. Jack 3, (RJ12), is where the signal plugs in.

Q. How does the integrated signal operation work?
A. Installation of the Integrated Signal Cable automatically disengages the timed Yellow feature of the stand-alone signal. All aspects are now under full control of the blocks and signals in front of and behind your train. (See manual for details.)

NOTE: For complete, detailed wiring and installation instructions and helpful diagrams, please see the manual that comes with the product, or download it here.

Helpful documents: (in pdf format) (Right-click to download)
Atlas Support Section
Atlas Model RR Signal System brochure (Color)
Signal light wiring diagram
Signal System Wiring
2-Rail approach mode diagram