Fiber Optic Linear Heat Detectors (FO LHD)
Specifications Overview
Fiber Optic Linear Heat Detector LHD-1-4
LHD-1-4 detects fires along a fiber optic cable, based on parameters selected via user interface. Determination of the fire location allows to identify the area (room) where fire is detected, even when the cable is destroyed as a result of the fire. Two cable types can be used:
– with LSZH jacket – for operating temperatures up to 80°C
– with silicone rubber jacket – for operating temperatures up to 200°C
| Max length of fiber optic cable, km | 4 |
| Spatial resolution, m | 4 |
| Max number of controlled areas (zones, rooms) | 1000 |
| Temperature resolution, °C | +/- 2 |
| Sampling time, sec | 6 |
| Fiber type | MM 62.5/125 |
| Operating temperature, °C | -40...+200 |
| Number of internal relay outputs | 32 |
| Interface | Dry contacts |
| Max resistance of closed relay contacts, Ohm | 30 |
| Power supply, V | 10 - 29 |
| Current, A | 0.45 - 0.9 |
| Protection class | IP54 |
| Dimensions, mm | 500 * 350 * 190 |
| Weight, kg | 2.0 |
Fiber Optic Linear Heat Detector LHD-2-8
LHD-2-8 detects fires along a fiber optic cable, based on parameters selected via user interface. Determination of the fire location allows to identify the area (room) where fire is detected, even when the cable is destroyed as a result of the fire. Two cable types can be used:
– with LSZH jacket – for operating temperatures up to 80°C
– with silicone rubber jacket – for operating temperatures up to 200°C
| Number of channels | 2 |
| Max length of fiber optic cable, km | 8 |
| Spatial resolution, m | 4 |
| Max number of controlled areas (zones, rooms) | 2000 |
| Temperature resolution, °C | +/- 2 |
| Sampling time per channel, sec | 8 |
| Fiber type | MM 62.5/125 or MM 50/125 |
| Operating temperature, °C | +10...+55 |
| Max number of relay outputs | up to 240 (including 34 internal) |
| Interface | RS-232 |
| Max resistance of closed relay contacts, Ohm | 30 |
| Power supply, V | 10 - 29 or 220 |
| Current, A | 0.45 - 0.9 |
| Protection class | IP54 or IP66 |
| Dimensions, mm | 500 * 500 * 216 |
| Weight, kg | 15 |
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