VESDA NFXI-FLX-020 FAAST FLEX Loop Aspirating Detector (2-Channel)

The NFXI-FLX-020 is the Notifier version of the Addressable FAAST FLEX dual-channel aspirating smoke detector, which connects to an addressable fire panel loop. Honeywell lists it as the Notifier replacement for the discontinued FAAST LT loop-based dual-channel and double-knock units. Two independent channels allow two areas to be protected or coincident (double-knock) detection.

Key features

• Blue LED and photodiode detection with dual optical path for high sensitivity
• Ultrasonic flow sensor and metallic mesh filter per chamber
• Alarm, General Purpose Output (GPO) and Fault relays per channel
• General Purpose Input for remote Reset, Disable or External Fault
• Configuration by 10-way DIP switch out of the box, or extended modes via the fire panel or SmartConfig Bluetooth app
• Modular design: in-field replaceable sensing module, filter and aspirator
• Onboard event log of up to 2,100 events; USB for log download and firmware upgrade
• Suitable for cold stores with -40 °C operating temperature; IP40
• Approvals: EN 54-20 / ISO 7240-20, VdS, CE, RED
• Double-knock capability for coincident detection

Technical specifications

• Part number: NFXI-FLX-020 (Addressable FAAST FLEX, dual channel)
• Area coverage: up to 2,000 m²
• Pipe network: 2 x 105 m linear or 4 x 105 m branched; up to 420 m in Pinnacle mode
• Sampling holes Class A / B / C: 12 / 32 / 48 (Pinnacle)
• Maximum power consumption: 450 mA @ 24 Vdc
• Loop standby current: 680 μA @ 24 V (no communication)
• Supply voltage: 24 Vdc (19–30 Vdc)
• Loop operating voltage range: 15–32 VDC (24 V nominal)
• Relays: 3 per channel (Alarm, GPO, Fault), 2 A @ 30 V
• Sensitivity range: 0.05–0.656% obs/m
• Operating and sampled air temperature: -40 °C to 55 °C; humidity 10–93% RH
• Ingress protection: IP40
• Dimensions (WHD): 205 x 280 x 80.5 mm; weight: 1.7 kg