1. Úvod
This manual provides instructions for the proper installation, operation, and maintenance of the uxcell SFM-27 Active Electronic Buzzer. This device is designed to produce a continuous sound alarm when a DC voltage between 3V and 24V is applied. Please read this manual thoroughly before using the product to ensure safe and efficient operation.
2. Konec produktuview
The uxcell SFM-27 is an active electronic buzzer featuring a plastic housing and two pre-attached wires for easy connection. It is designed for various industrial and electronic applications where an audible alert is required.
Klíčové vlastnosti:
- Wide Voltage Rozsah: Operates on DC 3V to 24V.
- Vysoký zvukový výstup: Produces a continuous sound at 100dB.
- Snadné zapojení: Equipped with black and red wires for straightforward connection.
- Odolná konstrukce: Housed in a plastic casing.
- Kompaktní design: Suitable for integration into various systems.
Komponenty:
- Electronic Buzzer Unit (SFM-27)
- Red Wire (Positive Terminal)
- Black Wire (Negative Terminal)
- Mounting Holes (for secure installation)

Obrázek 2.1: Přední strana view of the uxcell SFM-27 Active Electronic Buzzer, showing the sound output grille and attached red and black power wires.
3. Specifikace
| Parametr | Hodnota |
|---|---|
| Název produktu | Electronic Buzzer |
| Model č. | SFM-27 |
| Sound-making Type | Nepřetržitý zvuk |
| Jmenovitý objemtage | DC 3-24V |
| Jmenovitý proud | 15 mA |
| Zvukový tlak | 100 dB |
| Provozní teplota | -20°C až +45°C |
| Overall Size (L*W*H) | 47 x 30 x 14 mm / 1.85 x 1.14 x 0.55 palce |
| Mounting Holes (L*W) | 3.5 x 4 mm / 0.14 x 0.16 palce |
| Vzdálenost montážního otvoru | 39 mm / 1.5 palců |
| Délka drátu | 11 cm / 4.3 palců |
| Rezonanční frekvence | 2.5 ± 0.5 kHz |
| Vnější materiál | Plast |
| Barva | Bílý |
| Hmotnost (na jednotku) | 34 g |

Figure 3.1: Dimensions of the uxcell SFM-27 Active Electronic Buzzer, indicating mounting hole spacing and overall size.
4. Bezpečnostní informace
Dodržujte prosím následující bezpečnostní opatření, abyste předešli zranění nebo poškození produktu:
- svtage Kompatibilita: Zajistěte napájení objtage is within the specified DC 3V-24V range. Applying incorrect voltage can damage the buzzer.
- Polarita: Connect the red wire to the positive (+) terminal and the black wire to the negative (-) terminal of the DC power source. Incorrect polarity will prevent the buzzer from functioning.
- Zapojení: All wiring should be performed by a qualified individual or with proper knowledge of electrical connections. Ensure connections are secure to prevent short circuits.
- Prostředí: Do not expose the buzzer to extreme temperatures, moisture, or corrosive environments beyond its operating specifications.
- Hladina zvuku: The buzzer produces a loud sound (100dB). Avoid prolonged exposure to the sound at close range to prevent hearing discomfort.
- Děti: Udržujte zařízení mimo dosah dětí.
5. Nastavení a instalace
Follow these steps to set up and install your electronic buzzer:
- Příprava místa montáže: Choose a suitable location for the buzzer. The buzzer features two mounting holes with a distance of 39mm (1.5 inches) between them.
- Secure the Buzzer: Use appropriate screws (not included) to securely fasten the buzzer to your chosen surface through the mounting holes.
- Připojte napájení:
- Identify the red wire and the black wire extending from the buzzer.
- Připojte červený drát k kladný (+) pól of your DC power supply (3V-24V).
- Připojte černý vodič k záporný (-) terminál of your DC power supply.
- Ujistěte se, že všechna připojení jsou pevná a izolovaná, aby se zabránilo zkratu.
- Test funkčnosti: Once wired, apply power to the circuit. The buzzer should emit a continuous sound. If it does not, refer to the Troubleshooting section.
6. Provoz
The uxcell SFM-27 Active Electronic Buzzer is designed for simple operation. It functions as a direct alarm device:
- Když DC objemtage within the 3V-24V range is applied to its terminals with correct polarity, the buzzer will immediately emit a continuous sound at approximately 100dB.
- The sound will cease when the power supply is disconnected or interrupted.
- This buzzer produces a continuous tone and does not have adjustable volume or tone patterns.
7. Údržba
The uxcell SFM-27 Active Electronic Buzzer requires minimal maintenance:
- Čištění: Periodically wipe the exterior of the buzzer with a soft, dry cloth to remove dust. Do not use harsh chemicals or abrasive cleaners.
- Inspekce: Regularly check the wiring for any signs of damage, fraying, or loose connections. Ensure the mounting remains secure.
- Prostředí: Zajistěte, aby provozní prostředí zůstalo v rámci specifikovaného rozsahu teploty a vlhkosti, abyste prodloužili životnost zařízení.
8. Řešení problémů
If the buzzer does not function as expected, refer to the following troubleshooting guide:
| Problém | Možná příčina | Řešení |
|---|---|---|
| No sound from buzzer |
|
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| Weak or intermittent sound |
|
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9. Záruka a podpora
For warranty information and customer support, please refer to the documentation provided at the time of purchase or contact your retailer. You may also visit the official uxcell brand store for additional product information and support resources.
uxcell Brand Store: https://www.amazon.com/stores/uxcell/page/9C5CFA37-6CB6-400F-AA4A-658A763458C5





