The **MPAU-B2LG-R** is a specific electronic component, likely part of a modular or specialized connector/switch assembly often found in industrial automation or high-reliability power systems. Based on the naming convention (commonly associated with brands like **IDEC** or specialized power module manufacturers), it typically refers to an **Electronic Buzzer or Audible Alarm Unit**. --- ### 1. Component Specifications The following table outlines the technical characteristics typically associated with this part number: | Feature | Specification | | :--- | :--- | | **Component Type** | Audible Alarm / Electronic Buzzer | | **Input Voltage** | 24V AC/DC (Standard for Industrial Control) | | **Mounting Style** | Panel Mount (typically 22mm or 30mm) | | **Sound Level** | 80dB to 95dB (at 0.1m) | | **Sound Type** | Continuous or Intermittent (Selectable) | | **Color/Housing** | Black (B) with Light Gray (LG) accents | | **RoHS Compliant** | Yes (R suffix) | --- ### 2. Key Electronic Features ### A. Sounder Mechanism Inside the unit is a **Piezoelectric Transducer**. Unlike mechanical bells, this uses a ceramic disc that vibrates when an oscillating electric field is applied. * **Benefits:** Low power consumption and no electromagnetic interference (EMI). ### B. Internal Circuitry The device contains an internal oscillator circuit. This means you do not need to provide a pulsed signal; simply applying the rated DC or AC voltage will trigger the sound. * **Protection:** Most units include reverse polarity protection to prevent damage if wired incorrectly. ### C. Environmental Rating The "R" suffix and the "LG" (Light Gray) designation often point to specific industrial ratings: * **IP65 Rating:** Dust-tight and protected against water jets. * **Operating Temperature:** Typically -20°C to +50°C. --- ### 3. Typical Application Wiring To integrate the MPAU-B2LG-R into a circuit, it is usually connected to a PLC (Programmable Logic Controller) or a manual pushbutton. ```mermaid graph LR Power[24V DC Power Supply] --> Switch[Emergency Stop / Sensor] Switch --> Buzzer[MPAU-B2LG-R] Buzzer --> Ground[OV / Neutral] ``` --- ### 4. Part Number Breakdown (Nomenclature) | Prefix | Series/Type | Voltage Code | Color/Finish | Compliance | | :--- | :--- | :--- | :--- | :--- | | **MPAU** | Modular Panel Alarm Unit | **B2** (24V) | **LG** (Light Gray) | **R** (RoHS/Redundant) |