The Notifier Intelligent VESDA-E VES SLC with VESDAnet detectors (referred to as 2nd Gen. detectors) have an integrated Signaling Line Circuit (SLC) module to communicate with Notifier Fire Alarm Control Panels (FACP) directly over the SLC loop. The 2nd Gen. detectors are variants of the conventional VESDA-E VES detectors with built-in SLC interface module.
The SLC connectivity and SLC address occupancy on the 2nd Gen. detectors is backward compatible with the 1st Gen. detectors.The 2nd Gen. detectors have new features which are mainly VESDAnet communication and UL 268 7th Edition compliance, hence the addition of the “-VN” suffix to the model number, where the “VN” stands for VESDAnet communication. The UL 268 7th Edition introduces a new level of performance for smoke detectors aiming to improve the life safety of the building occupants and reduce nuisance alarms.
Similar to the regular VES mechanism of operation, the intelligent 1st and 2nd Gen. VES SLC detector draws air from all sectors in use. If the smoke level reaches the Adaptive Scan Threshold, the intelligent VES quickly scans each sector to identify which sector is carrying smoke. The first sector to reach the alert level is designated as the First Alarm Sector (FAS) and this sector is signaled to the user on the detector display. If two or more sectors reach the alert level, the sector with the highest smoke concentration is designated as the First Alarm Sector (FAS). Once Fast Scan is completed and the FAS identified, the intelligent VES continues to closely monitor all four sectors to track fire growth and maintain full protection of the area.
On the fire alarm panel side, if two or more sectors are at different alarm levels, then general alarms corresponding to each threshold
(Alert, Action, Fire 1, or Fire 2) will be raised by the panel but the sector carrying the highest smoke concentration will be shown on the panel display. Similarly, if two or more sectors are having the same alarm level, then the sector which was reported first by the detector will be shown on the panel display.
Operating Conditions1
Storage Conditions (Non-operational)
Must not be exposed to sunlight or other radiation sources
1 Please consult your Notifier representative for information on operation outside these parameters or where sampled air is continually above 0.015% obs/ft (0.05% obs/m) under normal operating conditions.
2 Sampled air temperature shall reach detector ambient temperature upon entry into detector. Refer to Xtralis Design Guides and Application Notes for sampled air preconditioning.
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Document Name | Asset Type | Type & Size | Modified Date | |
---|---|---|---|---|
VESDA-E VES SLC with VESDAnet Detectors | Data Sheets | pdf | 0.70 MB | 04/01/2024 | |
VESDA-E SLC 2nd Gen. Sell Sheet | Sell Sheet | pdf | 0.60 MB | 04/01/2024 |