Bosch Emergency Failsafe Volume Control Wall Plate 100 watt. Suitable for 3-wire and 4-wire override systems with built-in 24 VDC override relay.
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Public address systems are often used for both announcements and background music distribution. Volume controls can be used to adjust the level locally. In the event of an (emergency) announcement, the built-in relay ensures that the message is broadcast at a pre-set level, independent of the local volume setting.
The /20 model has a failsafe, 4-wire volume override where the override relay is deactivated during an emergency call. Should only be used in conjunction with 24VDC. The design and colour are unobtrusive in any interior. Ease of installation, operation and reliability is optimized in the design.
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