Railroad signal controllers
Bring a Real Railroad Signal to Life.
Wireless browser-based controllers for collectors, museums, displays, and custom railroad-signal projects—without requiring dedicated control software.
Available controller families
Built around the signal you own.
Controllers are configured for the mechanism, number of heads, lamp groups, and indications required by the customer’s signal. Current availability and pricing are maintained in the shop.
01 / Searchlight
H, H2 & SA
Single- and dual-head control for compatible US&S and GRS DC searchlight mechanisms.
02 / Position light
PRR & N&W PL
Independent indication selection, editable indication delays, and customer-specified default cycle times.
03 / Color position
CPL
Standard B&O indications with support for up to eight bulb groups and select modified configurations.
04 / Multi-color
3-Color & Custom
Safetran, G-type, miscellaneous multi-color heads, and custom relay configurations.
Searchlight platform update: Single-head searchlight controllers now use the DHSL controller platform, populated only with the relays required for the application.
Browser-based operation
Control it from your phone, tablet, or computer.
The controller creates its own wireless network and is operated through a web browser. No dedicated application needs to be installed.
- Master relay on and off
- Start the programmed indication cycle
- Select individual colors or indications
- Manually flash an available color
- Adjust indication-cycle timing
Searchlight controllers
Single-head and dual-head operation.
Single Head
- Compatible with tested DC US&S H/H2 and GRS SA mechanisms
- Red, yellow, and green requested-color indicator LEDs
- Manual indication-cycle switch and reset button
- Programmed cycle through red, flashing red, yellow, flashing yellow, and green
- Lunar option available by special request
- 115200-baud serial monitoring through micro-USB
Dual Head
Dual-head controllers provide the same browser and manual-control features while operating two heads. Head A is the upper head and Head B is the lower head.
The standard cycle includes Red/Red, Flashing Red/Red, Yellow/Red, Green/Red, Yellow/Yellow, Red/Yellow, and Red/Green. Reasonable custom indication-cycle changes can be programmed.
PRR / N&W position light
Position-Light Controllers
- Independent indication selection
- Editable indication delay
- One-second dark interval between indication changes while cycling
- Customer-specified default cycle times
- Pre-wired relay and terminal-block assembly
- Operates from the 12VDC bulb supply
Color position light
CPL Controllers
- Browser controls shared with the searchlight platform
- Programmed with standard B&O indications
- Supports up to eight bulb groups
- Selected modified configurations may support an additional group
- Customer identifies the bulb groups and marker-light arrangement
- Operates from the 12VDC bulb supply
Custom controllers
Have something unusual?
If a standard controller does not fit your signal, reach out. Custom boards, added relays, unusual head arrangements, and specialized indication programs can often be accommodated.
The example shown uses a modified CPL board with an additional relay to support a three-head G-type signal.
Power, installation & safety
Plan the installation before energizing the controller.
Power and enclosure
- Searchlight boards use micro-USB power; a power adapter is not included.
- An auxiliary terminal and a suitable 12V-to-5V micro-USB converter may be used when properly installed.
- The signal lamps and mechanism require an appropriate external DC power supply.
- Optional 3D-printed cases are not waterproof.
- PL and CPL assemblies operate from the 12VDC bulb supply and arrive pre-wired to the included terminal block and relays.
Safety requirements
- Do not touch an energized circuit board or live traces.
- Never place or mount the board on a conductive surface.
- Use properly sized wire and fused connections.
- Do not draw more than five amps through the controller board.
- Use a clean, stable DC supply. Electrical noise may prevent correct operation.
- After startup, reset, or a power interruption, searchlight controllers default to a red indication.
Warranty and use: Controllers are tested before delivery and are warranted against defects for 90 days. Relay service life cannot be guaranteed beyond that period, but WirelessBilly will work with customers to diagnose later failures. The customer is responsible for proper wiring, power, mounting, and safe use.
Ready to operate your signal?
Browse current controllers and pricing in the shop, or contact WirelessBilly to discuss compatibility and custom programming.