1. Product Overview
The LUBAN LED Signal Tower Stack Light is an industrial warning column lamp designed for various applications, including automated machinery status indication, operator signaling, and lean tower light systems. This model features three distinct LED layers (Red, Yellow, Green) and an integrated buzzer, operating on a 12-24V DC power supply. Its rotatable base allows for flexible positioning.

Figure 1: Front view of the LUBAN 3-Layer LED Signal Tower Stack Light.
Key Features:
- High-intensity LED lights with low power consumption, ensuring visibility from a distance.
- Long-lasting LED lifespan of approximately 100,000 hours.
- Built-in 90dB buzzer for audible alerts.
- Each light tier can be independently switched between continuous (steady) and flashing modes.
- Durable construction with an IP54 rating for dust and moisture resistance, and NEMA 5 compliance.
- Features a 180-degree rotatable base for versatile mounting and angle adjustment.
2. Installation and Setup
2.1 Package Contents
- LUBAN LED Signal Tower Stack Light (3-Layer, Red/Yellow/Green, 12-24V DC with Buzzer)
- Mounting hardware (screws, washers - may vary)
2.2 Mounting Instructions
The signal tower is designed for ceiling mount applications, but its rotatable base allows for flexible installation on various surfaces. Ensure the mounting surface is stable and can support the weight of the unit.
- Select a suitable mounting location, considering visibility and cable routing.
- Use the base of the unit as a template to mark drilling points for the mounting screws.
- Drill pilot holes if necessary, then secure the unit firmly to the surface using appropriate screws.
- Adjust the rotatable base to achieve the desired viewing angle.

Figure 2: The signal tower features a 180-degree rotatable base for flexible positioning.
2.3 Wiring Diagram (12-24V DC)
Connect the signal tower to a 12-24V DC power source according to the following wiring scheme. Ensure power is disconnected before making any electrical connections.
- Black Wire: Common Negative (Naught wire)
- Red Wire: Positive for Red Light
- Yellow Wire: Positive for Yellow Light
- Green Wire: Positive for Green Light
- Grey Wire: Positive for Buzzer (Sound)

Figure 3: Wiring diagram for the 3-layer signal tower. Connect each colored wire to a positive live wire to activate the corresponding light or buzzer, and the black wire to the common negative.
Caution: Incorrect wiring can damage the unit or pose a safety hazard. Consult a qualified electrician if you are unsure about the wiring process.
3. Operating Instructions
3.1 Light Mode Selection (Steady/Flashing)
Each individual light tier (Red, Yellow, Green) can be configured for either steady (continuous) or flashing operation. This is controlled by a small toggle switch located inside each light module.
- Carefully unscrew and remove the colored lampshade of the desired light tier.
- Locate the small toggle switch on the LED circuit board for that tier.
- Toggle the switch to select between 'Steady' or 'Flashing' mode.
- Replace the lampshade securely.

Figure 4: Internal view of a light module, highlighting the high-light LED beads and the toggle switch for selecting steady or flashing mode.

Figure 5: A close-up of the toggle switch on the LED board, used to switch between flashing and steady light modes.
3.2 Buzzer Operation
The integrated 90dB buzzer is activated by applying a positive voltage to the Grey wire, as shown in the wiring diagram (Figure 3). The buzzer provides an audible alert in conjunction with the visual signals.
4. Maintenance
The LUBAN LED Signal Tower Stack Light is designed for durability and requires minimal maintenance.
- Cleaning: Periodically wipe the exterior of the unit with a soft, damp cloth to remove dust and grime. Do not use abrasive cleaners or solvents.
- Inspection: Regularly check the mounting hardware for tightness and inspect the wiring for any signs of wear or damage.
- LED Lifespan: The LEDs have a long lifespan (100,000 hours) and typically do not require replacement under normal operating conditions.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Light(s) not illuminating | No power supply; Incorrect wiring; Faulty LED module. | Verify power connection (12-24V DC); Check wiring against diagram (Figure 3); Ensure individual light wires are receiving positive voltage; Contact support if module is faulty. |
| Buzzer not sounding | Incorrect wiring; Faulty buzzer. | Verify Grey wire is connected to positive voltage; Check Black wire for common negative connection; Contact support if buzzer is faulty. |
| Light mode (steady/flashing) not changing | Toggle switch not correctly set. | Remove lampshade and ensure the internal toggle switch (Figures 4 & 5) is firmly set to the desired position. |
| Unit not securely mounted | Loose mounting screws. | Tighten all mounting screws. Ensure appropriate hardware is used for the mounting surface. |
6. Specifications
| Feature | Detail |
|---|---|
| Model Number | AMZ-XHD02-3C-24V-YS |
| Brand | LUBAN |
| Color Configuration | Red / Yellow / Green |
| Voltage | 12-24V DC |
| Style | 3-Layer with Buzzer |
| Light Source Type | LED |
| Buzzer Output | 90dB |
| Material | Acrylonitrile Butadiene Styrene (ABS), Polycarbonate (PC) |
| Protection Rating | IP54, NEMA 5 |
| Mounting Type | Ceiling Mount (with rotatable base) |
| Product Dimensions | 2.76"L x 2.76"W x 10.43"H (7cm x 7cm x 26.5cm) |
| Item Weight | 0.26 Kilograms (9.2 ounces) |
| Special Features | 180-degree rotation, Steady/Flashing switchable |
| UPC | 797153407083 |

Figure 6: Dimensional overview of LUBAN stack lights. This model is 26.5 cm / 10.4 inches tall.
7. Warranty and Support
For warranty information, technical support, or any inquiries regarding your LUBAN LED Signal Tower Stack Light, please contact the manufacturer or your point of purchase. Keep your purchase receipt for warranty claims.





