N200-102-00 1 I56-3947-200
DESCRIPTION
The LT NFXI-ASD Series is part of the Fire Alarm Aspiration
Sensing Technology
®
(FAAST) family. FAAST is an advanced
re detection system for use where early warning and very early
warning are a requirement. The system continuously draws air
from the controlled environment through a series of sampling holes
to monitor the environment for smoke particulate.
The NFXI-ASD is the addressable version of the FAAST LT range,
communicating with the CIE (Fire Panel) via a proprietary loop
protocol. It is available in 3 different models:
NFXI-ASD11 - Has single channel capability with one laser smoke
sensor.
NFXI-ASD12 - Has single channel capability with two laser smoke
sensors in a common chamber for coincidence
detection.
NFXI-ASD22 - Has two channel capability with two laser smoke
sensors in separate chambers. (one sensor for
each channel).
This guide provides information for mounting and basic installation
using the unit’s default factory settings. For more advanced information
please see the FAAST LT Advanced Setup and Control Guide.
SPECIFICATIONS
Electrical Characteristics
Voltage Range: 18.5 - 31.5 VDC
Supply Current: 1 Channel: 170mA (typical); 360mA (max) @
24 VDC 25
o
C (excluding sounders)
2 Channel: 270mA (typical); 570mA (max) @
24 VDC 25
o
C (excluding sounders)
Communication Loop Supply Voltage: 15 – 29 VDC (Loop current ≤
900mA)
Communication Loop Standby Current: @ 24V: 900 µA max. (poll once
every 5s)
Module Isolator Characteristics
Maximum rated switching current
(under short circuit, Is max): 0.9A @ ≤ 29V
Maximum leakage current (IL max)
with the switch open (isolated state): 15mA
Maximum series impedance with
the switch closed (Zc max): 190 m ohm at 15Vdc; 1A
Power Reset: 0.5s
Congurable Input: Activation Time: 2s (min)
Relay Contact Ratings: 2.0 A @ 30 VDC, 0.5A @ 30 VAC
Environmental Ratings
Temperature: -10°C to 55°C
Relative Humidity: 10% to 93% (non-condensing)
IP Rating: 65
Mechanical
Exterior Dimensions: See Figure 1
Wiring: 0.5 mm² to 2 mm² max
Maximum Single Pipe Length See Table 1A
Maximum Number of Holes See Table 1A
Pipe Spec (EN54-20 Compliance): to EN 61386
(Crush 1, Impact 1, Temp 31)
Outside Pipe Diameter: 25mm (nom) or 27mm (nom)
Shipping Weight: 6.5kg (inc sensors)
FIRE ALARM ASPIRATION SENSING TECHNOLOGY
®
QUICK INSTALLATION GUIDE ADDRESSABLE FAAST LT
MODELS NFXI-ASD11, NFXI-ASD12, NFXI-ASD22
Figure 1: Dimensions and Knock-Outs
E N G L I S H
PARTS LIST
Description Quantity
FAAST LT unit 1
Mounting bracket 1
3-pin Terminal block 6
4-pin Terminal block 1
2-pin Terminal block 3
47 k-ohm EOL Resistor 2
USB Cable 1
Front Panel Labelling Pack 1
Installation Kit CD 1
Quick Installation Guide 1
Important Note
Aspirating Smoke Detectors supplied and installed within the
EU must conform to the EU Construction Products Directive
(89/106/EEC) and the related European Product Standard EN
54-20. FAAST LT has been tested and certied to ensure that it
conforms to the necessary Standards, but strict adherence to this
instruction guide is advised to ensure that the installation meets
the requirements of the CPD Directive.
367 mm
135 mm
56 mm
44 mm
403 mm
356 mm
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