DIMENSIONAL DRAWING
Notes
1. The Sounder VAD Base is certified to EN54–3
when it is used in the higher volume range.
2. The lower volume range does not comply with
EN54–3 and should not be used as part of an
alarm application.
The purpose of the lower volume range is to
provide a warning in specific cases such as
hospital staff stations.
3. The Sounder VAD Base is a Type A device, ie, for
indoor use only.
4. The isolating circuit of the Sounder VAD Bases is
certified to EN54–17.
5. For information on isolating circuits see
publication PP2090 available on request from
Apollo.
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