INSTRUCTION MANUAL
A131 High Level Audible Warning System / Battery backup
European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
Tel: +44 (0)208 743 8880
www.e2s.com
Fax: +44 (0)208 740 4200
Document No. D5423-D5426-IS_Issue_B 12-02-13
Sheet 5 of 5
Fig 3: Schematic Circuit Diagram of AC unit with stages S2 and S3 with negative switching