PL-21N30PQ Allicdata Electronics
Allicdata Part #:

PL-21N30PQ-ND

Manufacturer Part#:

PL-21N30PQ

Price: $ 4.88
Product Category:

Audio Products

Manufacturer: Mallory Sonalert Products Inc.
Short Description: AUDIO PIEZO INDICATOR 3-28V TH
More Detail: Buzzers Indicator, Internally Driven Piezo 12V 12m...
DataSheet: PL-21N30PQ datasheetPL-21N30PQ Datasheet/PDF
Quantity: 1000
Lead Free Status / RoHS Status: Lead free / RoHS Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
50 +: $ 4.43356
Stock 1000Can Ship Immediately
$ 4.88
Specifications
Series: PL
Packaging: Bulk 
Lead Free Status / RoHS Status: --
Part Status: Active
Moisture Sensitivity Level (MSL): --
Driver Circuitry: Indicator, Internally Driven
Input Type: DC
Voltage - Rated: 12V
Voltage Range: 3 ~ 28V
Frequency: 3kHz
Technology: Piezo
Operating Mode: Pulse, Slow
Duration: 1.2 PPS
Sound Pressure Level (SPL): 80dB @ 12V, 30cm
Current - Supply: 12mA
Port Location: Top
Operating Temperature: -20°C ~ 70°C
Approvals: --
Ratings: --
Mounting Type: Through Hole
Termination: PC Pins
Size / Dimension: 0.945" Dia (24.00mm)
Height - Seated (Max): 0.382" (9.70mm)
Description

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Alarms, Buzzers, and Sirens: PL-21N30PQ Application Field and Working Principle

Alarms, buzzers and sirens are commonly used to draw attention to an event of some kind, whether this is for an emergency or to announce a warning. A specifically designed product for this purpose is the PL-21N30PQ. This device is a particularly effective alarm buzzer, intended for general purpose signalling applications. This article will discuss the application field and working principle of the PL-21N30PQ.

Application Field

The PL-21N30PQ is generally used for indoor industrial signalling applications. Specifically, it is used for general purpose alarm, warning, and location indicator applications. Common applications include the signalling of flow level, pressure level, boiler, and open door alarms. As the PL-21N30PQ is relatively small, it can easily be mounted anywhere, which provides a much greater level of flexibility over large, hard wired alarm systems.

An additional advantage of the PL-21N30PQ is that it is designed to be used with electric equipment that meets the current safety standards of environmental protection. This is an important factor when considering which product to choose for use in hazardous environments such as chemical plants or factories.

Working Principle

The PL-21N30PQ works on a simple operating principle. This takes the form of an audio signal that is triggered by an electric current being applied. In particular, the PL-21N30PQ has been designed to produce an audible sound at a frequency of 3000Hz with a continuous sound output of no more than 75 Db/1m.

The functionality of the PL-21N30PQ is further increased with a total of three control methods. These are momentary, toggle, and indicated control. The momentary control method allows for an alarm to be turned on and off based on a single electric signal. The toggle method works similar to a typical light switch; a single electric signal turns the alarm on and then sending the same signal again turns the alarm off. The final control method, indicated control, is more flexible and provides the ability to send three separate electric signals for each level of alarm activation.

The power rating of the PL-21N30PQ is particularly impressive, with a power of 24 Watts. This is high enough to drive a large number of alarm buzzers without requiring an additional power amplifier. Despite the high power rating, the PL-21N30PQ can operate from a range of voltages, from 12-24Vdc, allowing it to be compatible with a wide range of alarm systems.

In conclusion, the PL-21N30PQ represents the state-of-the-art in alarm buzzers. It has a range of control methods and is suitable for a range of industrial signalling applications. It is easy to install, with no elaborate wiring required, and is designed to operate safely in hazardous environments. As such, it is a highly effective signalling device that should be considered when looking for an alarm buzzer.

The specific data is subject to PDF, and the above content is for reference

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