VESDA OSI-90 is the 90° imager (receiver) of the Xtralis OSID open-area smoke imaging detection system, with an 80° horizontal and 48° vertical field of view. One OSI-90 tracks up to seven emitters mounted around the perimeter of the protected area, giving three-dimensional coverage of large open areas such as atria.
Each emitter projects a coded sequence of ultraviolet and infrared pulses. Because the two wavelengths respond differently to small and large particles, the imager measures smoke obscuration while rejecting dust and solid intruding objects, and its CMOS imaging chip tolerates alignment drift from building movement.
Specifications
| Field of view |
80° horizontal x 48° vertical |
| Emitters per imager |
Up to 7 |
| Range, standard power emitter |
6 to 34 m (20 to 111 ft) |
| Range, OSE-HPW high power wired emitter |
12 to 68 m (39 to 223 ft) |
| Range, OSE-HP-01 battery high power emitter |
12 to 50 m (39 to 164 ft) |
| Supply voltage |
20 to 30 VDC (24 VDC nominal) |
| Imager current |
4 mA with 1 emitter, 7 mA with 7 emitters (nominal at 24 VDC); 27 mA peak in training |
| Relays |
Fire Alarm and Trouble, 2 A @ 30 VDC, NO-C-NC |
| Alarm thresholds |
20%, 35% or 50% (DIP switch selectable) |
| Field wiring |
26 to 12 AWG (0.2 to 4 mm²) |
| Adjustment angle |
±60° horizontal, ±15° vertical |
| Dimensions |
208 x 136 x 96 mm (8.2 x 5.4 x 3.8 in.) |
| Operating temperature |
14°F to 131°F (-10°C to 55°C); UL certified range 32°F to 104°F |
| Protection |
IP66 optics enclosure |
Installation notes
- Mount the imager opposite the emitters so its field of view takes in every emitter; a missing emitter or one outside the field of view signals a trouble
- Align with the OSID laser alignment tool, supplied in the OSID-INST installation kit
- Status LEDs show Fire (red) and Trouble/Power (yellow/green); a reset input and an anti-condensation heater option are provided
- Preventive maintenance is limited to occasionally cleaning the optical faces
Related models
- OSI-10: 7° imager for one emitter at up to 150 m
- OSE-SPW: standard power wired emitter, 24 VDC
- OSE-SP-01: standard power battery emitter
- OSE-HPW: high power wired emitter for double range
- OSID-INST: installation kit with laser alignment tool
Documents
FAQ
How many emitters can one OSI-90 monitor?
Up to seven emitters, placed around the perimeter of the protected area opposite the imager.
What range does it cover?
6 to 34 m (20 to 111 ft) with standard power emitters, 12 to 68 m (39 to 223 ft) with the OSE-HPW wired high power emitter, and 12 to 50 m with the OSE-HP-01 battery high power emitter.
How does it connect to the fire alarm panel?
Through dry Fire Alarm and Trouble relays rated 2 A at 30 VDC, giving a conventional alarm interface. Power is 20 to 30 VDC.
Are emitters included?
No. The OSI-90 is the imager only; emitters such as the OSE-SPW, OSE-SP-01 or OSE-HPW are ordered separately.
