M2BJ-B24A overview and application
Introduction to the M2BJ-B24A buzzer
The M2BJ-B24A is a piezo buzzer manufactured by Omron Automation and Safety, designed for industrial applications requiring reliable and clear audio indication. This buzzer operates with an input voltage ranging from 12 to 24 volts, suitable for both AC and DC supply, making it compatible with various industrial power systems. With a sound pressure level of 80 dB at 12V measured at 100 cm, it ensures audible alerts can be heard effectively in noisy environments. The device is panel mountable and features a connector type termination, facilitating easy and secure integration into control panels and machinery.
Use cases in industrial environments
Engineers and system integrators value the M2BJ-B24A for its robust design and sound performance, making it ideal for warning signals, status indication, and alerting purposes in manufacturing lines, automation systems, and safety installations. Its intermittent operating mode provides efficient signaling without continuous sound, which is advantageous for minimizing noise pollution and energy consumption. The buzzer’s piezo technology offers high reliability and long life, important for industrial settings where maintenance needs to be minimized and operational continuity is critical.
Technical specifications and key data
Electrical and acoustic specifications
The M2BJ-B24A buzzer operates within a voltage range of 12 to 24 volts AC or DC, drawing a supply current between 7 and 20 milliamperes depending on supply voltage and sound characteristics. It emits an intermittent tone at a frequency of 2 kHz, optimized for clear human hearing and regulatory compliance. Rated sound pressure level is approximately 80 decibels at 12 volts measured one meter from the source, which ensures its effectiveness for audio signaling in diverse industrial environments. The device includes internal drive circuitry, simplifying installation by eliminating the need for external drivers.
Physical dimensions and environmental ratings
The buzzer’s compact form factor measures approximately 24 mm in length, 18 mm in width, and has a seated height of 38 mm, allowing it to fit seamlessly within standard control panel cutouts. The device possesses an IP40 ingress protection rating, shielding it from solid objects larger than 1 mm, suitable for typical indoor industrial conditions where dust protection is necessary but complete water resistance is not required. Operating temperature ranges from -10°C to 55°C, supporting deployment in varied industrial climates without performance degradation.
| Specification | Details |
|---|---|
| Type | Internally Driven Piezo Buzzer |
| Voltage Range | 12 to 24 V AC/DC |
| Operating Current | 7 to 20 mA |
| Frequency | 2 kHz |
| Sound Level | 80 dB @ 12V (100 cm) |
| Operating Mode | Intermittent |
| Mounting Type | Panel Mount |
| Ingress Protection | IP40 |
| Termination | Connector |
| Dimensions (L x W x H) | 24 mm x 18 mm x 38 mm (seated height) |
| Operating Temperature | -10°C to 55°C |
Design features and series context
Integration within the Omron M2BJ series
The M2BJ-B24A is part of the Omron M2BJ series, characterized by cylindrical buzzer units with various voltage and sound configurations to suit multiple applications. This series offers models with different sound patterns such as continuous or intermittent tones, allowing customization based on signal urgency and environment. The buzzer units are known for their ease of installation with a two-piece snap-together construction that does not require tools, streamlining assembly processes in control panels. The M2BJ series also supports compliance with industrial standards such as CE, UL, and CSA, underscoring their suitability for professional industrial use.
Installation and operational advantages
Designed for panel mounting, the M2BJ-B24A buzzer provides secure attachment and proper acoustic projection through a top port location. Its connector termination type facilitates quick connection and replacement without complex wiring. The pin-selectable operating mode allows setting the buzzer to desired intermittent or continuous operation through simple jumper configuration, increasing flexibility in deployment. The compact size and standardized form factor ensure compatibility with existing control systems, reducing design adaptations. Reliable operation within a broad temperature range and the internal drive circuitry maximize operational stability while reducing the need for additional components.