855P-B30SE22

Overview of Allen-Bradley 855P-B30SE22

The Allen-Bradley 855P-B30SE22 is a compact 30 mm panel mount sounder designed for industrial signaling and alarm applications. This piezoelectric audible device operates on 12 to 24V AC/DC voltage and delivers a clear 72 dB output at a main frequency of 3500 Hz. The black polycarbonate housing provides durability and protection in demanding environments, meeting IP65 and NEMA 4X ratings for dust and water resistance. Weighing only 25 grams with a 30 mm outer diameter and 42 mm height, this sounder fits standard 22.5 mm mounting holes and can accommodate 30.5 mm holes using the optional adapter kit. The plug-in terminal block accepts wire sizes up to 2.5 mm² (14 AWG) with IP2X finger protection. Sound selection is controlled externally through terminal connections, allowing integration with existing control systems. The unit draws a nominal 20 mA at 24V AC/DC and operates reliably across a temperature range starting from -25°C, making it suitable for harsh industrial environments where consistent audible alerts are critical.

Key Features of Allen-Bradley 855P-B30SE22

• 72 dB audible output with 3500 Hz main frequency for clear signaling
• Universal voltage input: 12 to 24V AC/DC (10-26V range)
• IP65 and NEMA 4X rated polycarbonate housing
• Compact 30 mm design with 22.5 mm mounting hole compatibility
• Low power consumption: 20 mA nominal current
• External sound selection via terminal connection
• Operating temperature from -25°C for cold environment applications

Technical Specs of 855P-B30SE22

Applications / Use Case

The Allen-Bradley 855P-B30SE22 panel mount sounder serves as a critical audible signaling component in manufacturing facilities, process control environments, and machine safety systems. This device alerts operators to alarm conditions, process completion events, equipment malfunctions, or safety zone breaches. Common applications include packaging machinery where cycle completion signals are needed, conveyor systems requiring jam or fault notifications, and automated assembly lines that demand attention for material shortages or quality issues. The sounder integrates with PLC outputs, safety relays, or standalone control circuits to provide immediate audible feedback. Its IP65 rating makes it appropriate for food and beverage processing areas requiring washdown capability, pharmaceutical clean rooms, and outdoor equipment installations exposed to rain or dust. The wide voltage range accommodates both North American 24V DC control systems and European 12V AC applications. The external sound selection feature allows different alarm tones to be triggered based on urgency level, enabling operators to distinguish between routine notifications and critical faults without visual confirmation. Installation in control panels, operator stations, or directly on machine housings provides localized alerting exactly where attention is required.

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