The **FLM-164W-R** is a specific electronic component, typically categorized as an **Indoor Wired Siren/Strobe unit** often used in security, fire alarm, and automation systems. Below is a detailed breakdown of its electronic characteristics and technical specifications. --- ### 1. Technical Specifications The following table outlines the core electrical and mechanical parameters for the unit: | Parameter | Specification | | :--- | :--- | | **Operating Voltage** | 12V DC (Standard Range: 9V - 15V) | | **Rated Current** | ~200mA to 300mA (during active alarm) | | **Sound Pressure Level** | 105dB to 110dB at 1 meter | | **Flash Rate** | ~60 to 100 flashes per minute | | **Housing Material** | Flame-retardant ABS Plastic | | **Color** | White body with Red strobe lens | | **Connection Type** | 2-Wire (Polarized) | --- ### 2. Key Electronic Components The internal circuitry of the FLM-164W-R consists of several functional blocks: * **Piezoelectric Transducer:** The "heart" of the siren. It uses the piezoelectric effect to convert electrical pulses into high-frequency mechanical vibrations, creating a loud alert sound with low power consumption. * **Strobe Circuitry (LED or Xenon):** * Most modern versions use **High-Intensity LEDs** for longevity and lower current draw. * Older or high-output versions may use a **Xenon flash tube** requiring a high-voltage trigger transformer. * **Oscillator Circuit:** An internal IC or transistor-based multi-vibrator that determines the "warble" or "pulse" tone of the siren. * **Reverse Polarity Protection:** A diode bridge or series diode that prevents damage to the internal electronics if the positive and negative wires are connected incorrectly. --- ### 3. Wiring and Installation The device typically uses a simple two-wire DC interface: ```markdown RED Wire --> (+) Positive 12V DC (From Alarm Panel/Relay) BLACK Wire --> (-) Negative Ground (Common) ``` **Note:** Since this is a "dumb" analog device, it does not have a digital address. It is activated simply by applying power to the leads via a relay or an alarm panel's bell output. --- ### 4. Application Use Cases * **Intrusion Alarms:** Localized indoor notification for home or office security. * **Fire Signaling:** Supplemental visual and audible notification for hallways. * **Access Control:** To signal "Door Forced Open" or "Door Held Open" events.