The system includes all essential EVAC functions and elements, such as system supervision, spare amplifier switching, loudspeaker line supervision, digital message management, and an interface for a fireman's panel. The six-zone Plena voice alarm system controller contains a 240W booster amplifier and a supervised digital message manager for up to 255 pre-recorded announcements or chimes that create a comprehensive set of evacuation messages.
Configurations can be extended to cover up to 60 zones using additional six-zone routers.Other dedicated elements include call stations and extension keypads. The voice alarm system is fully compatible with existing Plena equipment such as booster amplifiers and background music (BGM) sources, say Bosch.
The system is designed for plug-and-play installation; elements are interconnected using standard RJ45 connectors and Cat 5 cables. Configuration for specific applications is set using DIP-switches to set basic functions and a PC for more advanced features. A range of EVAC-compliant Bosch loudspeakers and accessories is also available. The entire system incorporates Bosch technology and experience with high-end digital emergency sound systems.
Originally introduced in 2001, the Bosch Plena public address system comprises a range of mixer amplifiers, universal and system pre-amplifiers, booster amplifiers, call stations, source units, a message manager, a feedback suppressor and an "all-in-one" solution. The range is regularly extended, and the Plena voice alarm system is the most recent addition. Bosch also manufactures Praesideo, the world's first fully digital public address and emergency sound system.
(Lee Baldock)
