Description

The VESDA LaserFOCUS detector is a very early warning smoke detector designed to protect small, business-critical environments of less than 250 m2 (2,690 sq. ft.). The detector works by continually drawing air into sampling holes in a pipe network. The air is filtered and passed into a detection chamber where light scattering technology detects the presence of very small amounts of smoke. Detector status information is communicated on the detector display and via relays or optional interface cards.

Specifications
Input Power Voltage: 24V DC Nominal (18-30 V DC)
Current @ 24 VDC: 220 mA nominal, 295 mA in alarm
Dimensions (W x H x D): 256 mm x 183 mm x 92 mm (101/16 in x 71/5 in x 32/3 in)
Weight: Approx. 2 kg (4.4 lbs)
IP Rating: IP30
Mounting: Upright, inverted or horizontal

Operating Conditions*
Ambient: 0°C to 39°C (32°F to 103°F)*
Tested to (EN54-20): -10°C to 55°C (14°F to 131°F)
Sampled Air**: -20°C to 60°C (-4°F to 140°F)
Humidity: 5% to 95% RH, non-condensing

Sampling Network
Maximum pipe lengths: 1 x 25 m (80 ft) (Max. 12 holes)
2 x 15 m (50 ft) per branch (Max. 6 holes per branch)
Sampling Hole Options: Pre-Engineered Option or Maximum Pipe length in accordance with Pipe Modelling Design Tool (ASPIRE™)

Air Inlet Pipe
Accepts both metric and American standard pipe sizes
Metric: 25 mm (1.05 in.) American Pipe: IPS 21 mm (¾ in.)

Area Coverage
Up to 250 m2 (2,690 sq. ft.) depending on local codes and standards

Relay Outputs
3 changeover relays (Fire 1, Action, Fault), Contacts rated 2A @ 30 VDC (max). NO/NC Contacts

Cable Access
3 x 25 mm (1.05 in.) cable entries (1 rear entry, 2 top entry)

Cable Termination
Screw Terminals 0.2-2.5 mm2 (30-12 AWG)

Interfaces
Shown in Terminal Block Connections diagram, to right, plus an RS232 Programming Port.
General Purpose Input (GPI) interface offers: Reset, Disable, Standby, Alarm set 1, Alarm set 2 and External Input functions.

Alarm Threshold Setting Range
Alert, Action 0.025 – 2.00% obs/m (0.008 – 0.625% obs/ft)
Fire 1, Fire 2 0.025 – 20.00% obs/m (0.008 – 6.25% obs/ft)
Individual Alarm Delays 0 – 60 seconds
Two Alarm Threshold Settings Either time or GPI based

Display
• 4 Alarm State Indicators • Fault and Disabled Indicators
• Smoke Level Indicator • Instant Fault Finder
• Reset, Disable and Test Controls • Smoke and Flow AutoLearn Controls

Event Log
Up to 18000 events, time and date stamped in separate, non-volatile, logs for:
Smoke Level, Flow Level, Detector Status and Faults

AutoLearn Smoke & Flow
• Automatically set acceptable alarm thresholds for both smoke and flow levels
• Minimum 15 minutes, maximum 15 days (default 14 days)
• During AutoLearn thresholds are NOT changed from pre-set values