Network PA System – Alarm Signal Generator (2U, TF Playback, Dual Alarm Inputs)

Features:

- High‑grade aluminum 2U black anodized brushed panel, elegant and stylish.
- Short‑circuit activation alarm and DC24V activation alarm input.
- Automatically plays fixed siren or audio files stored on TF card when alarm is activated.
- Select any siren or audio file output via 6‑position DIP switch.
- Supports TF card reading up to 32GB, with recording time up to several hours.
- Supports up to 5 different audio files; pre‑store audio in corresponding folders on TF card, and trigger automatic playback by selecting the corresponding switch.
- MIC or LINE dual recording input options, automatically generates and saves files to TF card.
- 1 highest‑priority microphone input, which takes priority over all outputs.
- Built‑in handheld microphone for one‑hand operation.
- Adjustable recording level and output volume.
- Manual forced alarm and playback of TF pre‑stored audio files or recorded files.
- LED indicators on the front panel for alarm, audio playback and recording status.
- Powered by wide‑voltage switching power supply, supporting normal operation with AC100‑240V input.
- DC24V DC emergency power supply, automatically switches to DC24V when AC power is lost.

This **Network PA System** alarm signal generator provides flexible alarm triggering, TF card recording/playback, and dual power redundancy for reliable emergency broadcasting.

Technical Specifications:

- Microphone Input: <5‑10mV, 600Ω, unbalanced.
- Line Input: <400mV, 10kΩ, unbalanced.
- Line Output: >500mV (siren signal or TF card audio file).
- Siren Frequency Response: 100Hz~3.4kHz(±3dB).
- Audio File Frequency Response: 20Hz~20kHz(±2dB).
- Total Harmonic Distortion: THD <0.01% at 1kHz.
- ADC/DAC Sampling Rate: 8kHz, 5Bit.
- Recording Time: Several hours (depends on TF card memory size).
- Recordable Tracks: Unlimited (depends on TF card memory size).
- Alarm Activation Inputs: 2.
- Alarm Activation Level: (Low level / DC24V).
- Power Cord: (3×0.75 mm²)×1.5M (standard).
- Power Supply: AC100‑240V ±10% 50\60Hz, DC240V.
- Power Consumption: 15W.
- Machine Dimensions: 89(H)×483(W)×350(D) mm.
- Net Weight: 6.08kg.

In summary, this **Network PA System** alarm signal generator with TF storage, dual alarm inputs, and priority microphone is the ideal choice for emergency voice evacuation and public address systems in schools, factories, and commercial buildings.