24V DC Active Industrial Alarm Buzzer | Pro Tronix

Product Description

The 24V DC Active Industrial Alarm Buzzer is a high-decibel, heavy-duty audio signaling device engineered for 24V industrial automation, PLC control cabinets, process control panels, and commercial security installations. Featuring internal solid-state driver circuitry, this active electromagnetic buzzer produces a sharp, continuous 2.3 kHz alert tone immediately upon applying 24V DC power—no external frequency generators, software timing loops, or PWM signals required.

Built with standard 2.54 mm pin spacing and a rugged housing, this buzzer integrates easily into PCB control boards, relay driver modules, and terminal block panels. Consuming minimal power during active operation, it can be driven directly by 24V PLC transistor outputs, Darlington transistor arrays (like the ULN2003), MOSFET switches, or 24V relay contacts. Housed in a durable sealed black casing, it provides reliable acoustic notifications for machine status panels, safety interlocking alarms, power failure warnings, and industrial fault diagnostics.

⚠️ Polarity & Supply Voltage Tip: This active 24V buzzer is polarized. Connect the positive terminal (the longer lead or the pin marked with a “+” symbol on the top protective film) to the positive +24V DC rail or switched PLC output, and the negative terminal (shorter lead) to Ground / 0V. Do not connect this buzzer directly to 3.3V or 5V microcontroller GPIO pins, as low-voltage rails cannot trigger the 24V internal driver circuit. Always use a switching transistor, MOSFET, or relay module to interface low-voltage microcontrollers with the 24V supply line. Remove the top protective sticker after assembly for full acoustic volume.

Technical & Architectural Highlights

This 24V active alarm buzzer delivers high-volume audio signaling for industrial environments:

• Built-in Internal Driver: Emits a continuous, loud 2.3 kHz alarm tone automatically upon applying 24V DC—no PWM or sound generator code needed.

• 24V Industrial Native: Designed specifically for standard 24V DC industrial power rails, PLC output cards, and factory automation equipment.

• High Acoustic Output: Generates a penetrating continuous tone (over 85 dB) for clear audibility across noisy control rooms and factory floors.

• PCB & Terminal Friendly: Standard 2.54 mm pin pitch allows straightforward mounting on control boards, prototyping shields, and terminal block interfaces.

🧰 Prototyping & Audio Setup (Recommended Bundle)

Building industrial control panels, PLC alert systems, or 24V automation setups? Make sure you add these essential components to your cart to complete your project build:

1. 8 Ohm Mini Speakers & Audio Components: Looking for variable frequency tones, melody generation, or voice prompts alongside active buzzers? Check out our audio selection: Pro Tronix Mini Speakers & Audio Components

2. 5V / 12V / 24V Relay Modules: Essential for isolating 3.3V/5V microcontrollers (like Arduino or ESP32) and switching higher-voltage 24V power rails: Pro Tronix Relay Modules Collection

3. Solderless Breadboard: The essential foundation for wiring driver transistors, optocouplers, and power regulators without soldering: Pro Tronix Breadboards Collection

4. Jumper Wires & Cables: High-quality wire packs to route signals and power between microcontrollers, relays, and terminal interfaces: Pro Tronix Wires & Cables Collection

5. NPN Darlington Transistor Arrays (ULN2003 / TIP120): Ideal for switching 24V DC inductive and audio loads safely from low-voltage digital circuits.

Polarized Pinout & Connection Summary

Applications

• PLC & Factory Automation: Acoustic status indicators for PLC control cabinets, process alarms, and fault signaling.

• Industrial Control Panels: Machine status chimes, emergency stop indicators, and cycle completion alerts.

• Building Management Systems: Fire panel warnings, HVAC fault indicators, and access control alerts.

• 24V Solar & Backup Power: Low-voltage warnings and power interruption alarms for 24V battery systems.

Technical Specifications

What’s in the Box

• 1 x 24V DC Active Industrial Alarm Buzzer.

Everything you need for your next project is now available with guaranteed quality and fast shipping across Egypt.. Order now from Pro Tronix!