The Loop Sounder FI750/WB/MT/SOUW is powered and actuated via the loop with Labor Strauss protocol. The integrated Detector Base Series FI750 is designed to accommodate an automatic fire detector Series FI750. The sounder has a built-in dual-isolator module. Depending on the parameter setup of the control panel and the system condition, a compatible fire detection control panel can activate the sounder with up to 32 different tone types and selectable sound level. The following tone types can be selected, for example: • Slow Whoop tone according to NEN 2575, • DIN tone according to DIN 33404, • Continuous tone 1kHz. If several sounders are activated at the same time, they are synchronised by the control panel, in order to generate a uniform warning tone. The module address of the sounder is set in the range 1 to 240 by means of the hand-held Programming Unit FI750/PU. Alternatively, the sounder can be addressed automatically if it is connected to a compatible fire detection control panel. The loop sounder can also be operated without a detector attached to it. For this case, a white or red plastic cover is available as accessory. The sounder is designed for indoor mounting.