LEOTEK LD Series Traffic Signal Module – 12″ Bi-Modal Arrow 80-135Vac, Yellow Green
The LEOTEK LD Series 12″ Bi-Modal Arrow Traffic Signal Module is designed to provide flexible and highly visible directional guidance for complex traffic movements. Featuring a bi-modal arrow indication, this module supports multiple arrow orientations, making it ideal for intersections requiring adaptable lane control and turning management.
As part of the LEOTEK Frontier family, the LD Series utilizes advanced LED technology to deliver uniform light output, excellent color consistency, and wide viewing angles, ensuring clear visibility under all ambient conditions. The clear (transparent) lens enhances signal clarity, while the robust construction supports long-term outdoor operation with minimal maintenance.
Operating on 120Vac (80–135Vac), the LD Series Bi-Modal Arrow module integrates seamlessly into standard North American traffic signal systems and complies with applicable certification requirements, making it suitable for both new installations and retrofit projects.
Features
- 12″ bi-modal arrow module
- Two selectable indications within one signal face
- 80-135Vac operation
- Uniform LED optics with wide viewing performance
- For compatible arrow-signal housings
- Energy-efficient retrofit-ready design
LD Bi-Modal Arrow in Real-World Traffic Applications
PDF-Verified Model & Performance Data
Source: LD Series 12-inch Yellow/Green and Yellow/Yellow Arrows Traffic Signal Specification Sheet
| Model | First Indication | Second Indication | Typical Power | Wavelength | Minimum Maintained Intensity |
|---|---|---|---|---|---|
| TSL-12BM-LD-A1 | Yellow arrow | Green arrow | 7.0W / 6.2W | 589 / 500 nm | 146 / 76 cd |
Electrical & Compliance Data
| Input voltage | 80–135Vac |
|---|---|
| Operating temperature | -40°C to +74°C |
| Switching time | Below 75 ms |
| Turn-off threshold | Above 35Vac |
| Power quality | Power factor above 0.9; total harmonic distortion below 20% |
| Compliance | ITE Vehicle Arrow Supplement (2007) |
| Transient / EMC | FCC; MIL-STD-810F / 883; IEC 3 kV; 6 kV ring wave |
Technical FAQ
What does yellow/green bi-modal mean for this LD arrow?
This 12-inch LD module lists two arrow indication colors, yellow and green, in one bi-modal product configuration. Specify the full order code and controller sequence for the intended lane movement.
How does it differ from the yellow/yellow LD version?
The companion LD listing provides yellow and yellow, whereas this listing provides yellow and green. Match the two required indication colors and confirm the wiring and control scheme before ordering.
What lens and input range are listed?
The published configuration uses a clear lens and 120Vac nominal input, with an 80–135Vac operating range. Check the existing 12-inch housing and electrical interface against the selected model.
Specifications
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Series
Certification
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Indication
Color of Lens
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