The Notifier NFXI-SMT2-BK is the black version of the Opal NFXI-SMT2 analogue addressable photo-thermal multi-criteria detector with built-in short-circuit isolator. It adds heat sensing to a photoelectric smoke sensor for better false alarm immunity and a faster response to a wide range of fires. It uses the Notifier Opal advanced digital protocol and fits the B501AP analogue sensor base.
The smoke element meets EN 54-7, and the 58°C fixed-temperature and rate-of-rise heat assistance meets EN 54-5. Where normal daytime activities could cause unwanted alarms, the detector can be set to run in heat-only mode and switch back to full photo-thermal operation when the area is unoccupied.
Key features
- Photoelectric smoke and thermal sensing managed as a single unit
- Sensitivity of each sensing element can be changed from the panel
- Programmable heat-only mode for occupied periods
- Built-in short-circuit isolator
- Two tri-colour LEDs (red, green, amber) for 360° status indication
- Rotary decade address switches
- 100% mechanically and electrically backwards compatible
Technical specifications
- Height: 61 mm; diameter: 102 mm (installed in B501AP base)
- Weight: 99 g including base
- Operating voltage: 15 to 28.5 V DC
- Maximum standby current: 200 µA at 24 V DC (no communications); 300 µA at 24 V DC (LED blink enabled)
- Maximum continuous current: 1 A (switch closed)
- Isolation current: 15 mA at 24 V DC
- Remote output: 22.5 V DC, 10.8 mA at 24 V DC
- Maximum terminal wire size: 2.5 mm²
- Material: PC/ABS
- Operating temperature: -30°C to +70°C (do not install where the normal ambient temperature exceeds 50°C)
- Humidity: 10 to 93% RH, non-condensing
- IP rating: IP20 in B501AP base; IP23 in WB-1AP wet base
- Standards: EN 54-7 (smoke), EN 54-5 (58°C fixed and rate-of-rise thermal assistance)
