Addressable wireless fire alarm – Series 200A
DAS-WSD-200AAddressable wireless photoelectric smoke detector
Smoke detector of the Tan Vien Series 200A addressable wireless fire alarm system.
- Photoelectric smoke sensor, local alarm sounder
- LoRa transmission 312–316 MHz, 1000 m unobstructed
- Li-MnO₂ 3 V battery, ≈ 3 years (Level I), low-battery self-report
- Network registration with a single TEST button
Photoelectric smoke detector with an integrated LoRa module. Detects smoke in a fire, warns locally with light and sounder, and sends an addressed fire signal to the DAS-FACP-200A panel. Labyrinth optical chamber resists false alarms and responds evenly to a wide range of fire types.
Key features
- Photoelectric sensor. Light-scattering labyrinth detects smouldering smoke early and limits false alarms.
- Local alarm sounder. The buzzer sounds in the room immediately on fire alarm.
- Battery self-monitoring. A battery voltage < 2.75 V is automatically reported to the panel as a fault; the yellow LED flashes once every 30 s.
- One-button registration. Press TEST once while the panel is in registration mode — no signal wiring needed.
- Twist-lock, tamper-resistant base. Mount the base with 2 screws and twist the detector on; a lock mode with a dedicated key prevents removal.
Indicator status
| Power-on | Green flashes once |
|---|---|
| Monitoring | Green flashes once every ≈ 6 min |
| Fire alarm | Red steady + sounder “beep-beep-beep” ≈ 4 s per cycle |
| Sensor / button fault | Yellow flashes once every ≈ 2 s + short beep |
| Low battery (< 2.75 V) | Yellow flashes once every ≈ 30 s + short beep |
Installation notes
- Mount at the center of the ceiling, horizontally, avoiding dead air spaces; keep ≥ 1 m from air-conditioning vents.
- Do not install in kitchens, garages, or places with heavy dust, steam, or air velocity > 15 m/s.
- Layout per Table 1 of TCVN 5738:2021 (ceiling ≤ 3.5 m: ≤ 85 m², spacing ≤ 9 m).
For detailed network registration, installation and commissioning procedures, see Series 200A Design, Installation and Operation Manual (PDF).
Suitable installation locations
DAS-WSD-200A technical specifications
| Model | DAS-WSD-200A |
|---|---|
| Rated voltage | DC 3 V (1 Li-MnO₂ CR17505 battery) |
| Average monitoring current | < 100 µA |
| Average fire alarm current | < 80 mA (with sounder) |
| Frequency / transmit power | 312 – 316 MHz / ≤ 20 dBm |
| Receiver sensitivity | −126 dBm |
| Transmission range | 1000 m (unobstructed – manufacturer's figure) |
| Battery life | ≈ 3 years (Level I) · up to ≈ 5 years (Level II) |
| Dimensions | Ø 115 × 48 mm |
| Weight | ≈ 144 g |
| Housing / color | ABS / white |
| Environment | Indoor; −10 °C to +55 °C; RH ≤ 95 % |
| Reference standards | TCVN 7568-7 (ISO 7240-7) · TCVN 7568-25:2023 |
The 1000 m range is a manufacturer's figure measured in an unobstructed space. For indoor design in reinforced-concrete buildings, use a radius of ≈ 25 m around the panel/repeater (≈ 15 m in factories with heavy interference), and a radio survey is mandatory: pass when RSSI ≥ −100 dBm, SNR > 0.
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