Notifier NFXI-SMT2-BK Opal Optical Heat Multi-Sensor (Black, Isolated)

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)