The NBS series of conventional sounders are designed for use either underneath detector bases or as a standalone low profile sounder. These sounders have been designed with an emphasis on acoustic efficiency resulting in an omnidirectional, high volume sound field. These high output levels are achieved with a low current draw. The integral electronics provide the user with a choice of either continuous or sweeping tones at a variety of frequencies. The NBS sounders are available in a choice two colours red or white and supplied with either 3 or 14 pre-configured sounder patterns/tones. The sounder can be used under any detector base with 60mm mounting centres and an external diameter of up to 102mm. Alternatively, it can be wall mounted as a stand-alone unit. The NBS sounders can be integrated onto systems using other sounders from the Morley-IAS portfolio or other compatible systems.

• Ceiling mounting base sounder • 78 - 93dBA at 1 metre @ 24Vdc • Internal volume control • Rugged construction, IP44 rated • Easy cable entry & exit • Designed to meet EN54: part 3 • CE marked

mechanical Material ABS Flammability UL94-HB Colour Red or White Dimensions 30 x 117 (H x dia) mm including cover plate Operating temperature -30°C to + 70°C Maximum humidity 93% @ 40°C Ingress protection IP44 electrical Operating voltage 9-33Vdc Current consumption 9.0mA @ 12Vdc 18mA @ 24Vdc Output (dB) 78 - 93dB(A) adjustable @24Vdc 87dB @1m(800Hz, 12Vdc) 93dB @1m (800Hz, 24Vdc) Number of tones NBS3 - 3 tones NBS14 - 14 tones