ADDRESSABLE SMOKE & HEAT DETECTORS WITH INBUILT SHORT CIRCUIT ISOLATORS. VELOX addressable detectors employ optical and thermal detection technologies to sense fire conditions. The 60910, 60920, and 60930 range of detectors come with inbuilt short circuit isolators and a bi-colour (red/green) LED for 360 visibility. Combination of optical and thermal detection in a single detector head saves costs and spots both slow smoldering and high energy flaming fires. Up to 240 devices can be connected on a single loop, which can extend to 2 km as per load calculations and cable selections. The devices are powered from the same fire detection loop which connects the fire alarm control panel, sounders, beacons, manual call points, etc. Therefore, additional power supply sources are not required.