The backup power supply and switching unit "Trombone BP-21" is designed to provide backup low-voltage power supply (switched 24-28V/40A, constant 24-28V/2A and constant 12V/2A) to power amplifiers and other technical means included in the notification and evacuation control system. The units can also be used to power the evacuation lighting system and control additional technical means, such as light evacuation safety signs, electromagnetic locks of evacuation exit doors, sound emitters, siren generators, etc. Supplied with installed 7A/h 12V x 6pcs batteries. Can serve as a backup power supply for Trombone UM-120/Trombone UM-240/Trombone UM-360/Trombone UM-480/Trombone UM-600 amplifiers.
The blocks comply with technical conditions TU 4371-001-88310620-08, code of practice SP3.13130.2009 and GOST R 53325-2012.
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