VESDA VLF-500-UL 7Ed Product Guide VESDA
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8.5 Area Covered
VLF-500-UL 5380 sq. ft. (500 m²)
8.6 Field Wiring
Access 1 in. (3 x 25 mm) Cable entries (1 rear
entry)
Terminals 30 - 12 AWG (0.2 mm² - 2.5 mm²)
8.7 Interfaces
l Power In/Out.
l Fire 1 Relay (changeover, 2A @ 30 VDC).
l Action Relay (changeover, 2A @ 30 VDC).
l Fault Relay (changeover, 2A @ 30 VDC).
l General Purpose Input (clean contact).
l External display port (with power limited output).
l RS232 programming port.
8.8 Alarm Ranges
Alert, Action
0.008 – 0.625% obs/ft.
(0.025 – 2.0% obs/m)*
Fire 1, Fire 2
0.008 – 6.25% obs/ft.
(0.025 – 20% obs/m)*
Individual Delays 0 - 60 seconds
2 Threshold sets (1 & 2) Day and night
*For code-specific information, refer to Codes and Standards Information for Air Sampling Smoke Detection on page iii.
8.9 Display
l 4 Alarm State Indicators (Alert, Action, Fire 1 and Fire 2).
l Fault and Disabled Indicators.
l 10-sector Smoke Level Indicators.
l 10-sector Instant Fault Finder.
l Reset, Disable and Test Controls.
l Smoke and Flow AutoLearn Controls and Indicators.
8.10 Event Log
l Up to 18 000 events stored.
l Smoke trend, flow trend, faults events, configuration events and operational events.
l Date and time stamp.
8.11 AutoLearn Smoke and Flow
l Minimum 15 minutes, maximum 15 days (default 14 days).
l During AutoLearn, thresholds are NOT changed from pre-set values.
8.12 Referencing
l Reference smoke level source for networked detectors (requires a VESDAnet Interface card).
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