1. Introduction
The Waytronic WT-A32 is a versatile 12V DC 5-way alarm siren horn designed for various security and warning applications. It features a high decibel output of 116dB, customizable voice prompts, and multiple trigger methods, making it suitable for home security systems, industrial machinery, access control, toll stations, transport vehicles, and robotics.
Key Features:
- Support wide voltage input (DC 10-28V).
- Button-controlled cyclic volume adjustment.
- 4 modes of combination switch adjustment.
- Power-on loop sound mode.
- High/low level trigger single play.
- Low-level trigger loop playback.
- Built-in 4M FLASH memory for multiple MP3 voices.
- USB connectivity for voice replacement (simulates U disk).
- Optional synchronous output control signal and 485 control playback.
2. Product Specifications
| Specification | Value |
|---|---|
| Model Number | WT-A32 |
| Power Supply Mode | DC 10-28V |
| Alarm Sound Level | ≤120dB within 1 meter (116dB specified) |
| Protection Level | IPX5 (Speaker not waterproof internally) |
| Audio Format | MP3 format 16Kbps~320Kbps |
| Speaker Power | 10W/8 ohm |
| Working Current | 850mA |
| Working Temperature | -20~55℃ |
| Memory | Built-in 4M FLASH |
| Material | ABS+PC |
| Color | Black |
| Dimensions (approx.) | 104mm (length) x 110mm (height) x 12.5mm (base height) |
Product Dimensions:

3. Setup and Installation
Mounting the Siren Horn:
- Select a suitable mounting location that is stable and allows for optimal sound projection.
- Use the provided bracket and screws to securely attach the siren horn to the desired surface. Ensure the bracket is firmly fastened to prevent vibration or detachment.

Wiring Instructions:
The WT-A32 siren horn operates on a DC 10-28V power supply and features a 5-way trigger line for various control options. Refer to the wiring diagram below for proper connection.

- Power Connection: Connect the red wire to the positive (+) terminal of your DC 10-28V power supply and the black wire to the negative (-) terminal.
- Trigger Lines: The siren horn includes five trigger wires (colored yellow, blue, green, white, brown) that can be connected to external switches or control signals. Each trigger wire corresponds to a specific sound or function, allowing for multi-way voice control.
Voice Replacement via USB:
The WT-A32 allows for custom voice replacement by connecting it to a computer via a micro USB cable. This feature enables you to upload your own MP3 audio files to the device's 4M FLASH memory.

- Unscrew the bell mouth of the siren horn to access the internal circuit board.
- Locate the Micro USB port on the circuit board.
- Connect a Micro USB data cable to the port and the other end to your computer.
- The device should appear as a removable disk (U disk) on your computer.
- You can then drag and drop MP3 audio files (16Kbps~320Kbps) into the device's memory to replace existing voices or add new ones.
- Once files are transferred, safely eject the device from your computer and reassemble the bell mouth.
4. Operating Instructions
Volume Adjustment:
The siren horn features a 6-level volume adjustable function. This can be controlled via a button or a combination DIP switch on the internal circuit board, allowing you to set the sound level according to your application requirements.

Trigger Modes:
The WT-A32 supports various playback modes based on the trigger lines:
- High/Low Level Trigger Single Play: Each of the five trigger lines can be configured to play a specific sound when activated by a high or low electrical signal.
- Low-Level Trigger Loop Playback: Certain trigger lines can be set to continuously loop a sound when activated by a low-level signal.
- Power-on Loop Sound Mode: The device can be configured to play a default sound in a loop immediately upon receiving power.
- 4 Modes of Combination Switch Adjustment: Utilize the internal DIP switches to select different operational modes or sound sequences.
5. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the siren horn. Avoid using harsh chemicals or abrasive cleaners.
- Water Exposure: While the product has an IPX5 protection level, the internal components of the speaker are not fully waterproof. Avoid direct exposure to heavy rain or submerging the device in water. Ensure the bell mouth is securely fastened after any internal access.
- Environmental Conditions: Operate the device within the specified working temperature range of -20℃ to 55℃.
6. Troubleshooting
- No Sound Output:
- Check power connections: Ensure the red and black wires are correctly connected to a DC 10-28V power source.
- Verify trigger signals: Confirm that the trigger lines are receiving the correct high or low signals from your control system.
- Check volume settings: Ensure the volume is not set to minimum.
- Inspect internal connections: If recently accessed, ensure all internal wires and the speaker connection are secure.
- Incorrect Sound Playback:
- Review trigger line connections: Ensure the correct trigger line is activated for the desired sound.
- Verify MP3 format: Custom voices must be in MP3 format (16Kbps~320Kbps). Incorrect formats may lead to no sound or corrupted playback.
- Check DIP switch settings: Ensure the combination DIP switches are set for the desired playback mode.
- Device Not Recognized by Computer (for voice replacement):
- Ensure the Micro USB cable is properly connected to both the device and the computer.
- Try a different USB port or cable.
- Ensure the device is powered on when connecting to the computer.
- Power Supply Voltage: The power supply voltage must not exceed 28V. Exceeding this limit can cause abnormal operation or permanent damage to the device.
7. User Tips
- Customization: Take advantage of the USB voice replacement feature to tailor warning messages or alerts to your specific needs. This is particularly useful for industrial applications where specific instructions or safety warnings are required.
- Volume Control: Experiment with the 6-level volume adjustment to find the optimal sound level for your environment, ensuring it's loud enough to be effective without causing discomfort.
- Trigger Flexibility: Utilize the 5-way trigger lines to implement complex warning sequences or to differentiate between various alarm conditions.
- Installation Location: For outdoor use, consider placing the siren horn under a protective cover or in a location shielded from direct heavy rainfall to prolong its lifespan, despite its IPX5 rating.
8. Warranty and Support
The Waytronic WT-A32 Alarm Siren Horn comes with a 12-month warranty from the date of purchase, covering manufacturing defects. For technical support, inquiries, or warranty claims, please contact your retailer or the manufacturer directly. Ensure you have your purchase details and model number (WT-A32) ready when contacting support.





