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DSO-PRA
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3. Design of Voice Alarm System.
The design and all components of the DSO are based on the RACK 19" cabinet (Protection Class: IP30),
containing all components of the system. Depending on the system and the number of devices, the height of the
cabinet is adjusted individually. The available dimensions are 24U(600x600) to 50U(600x800).
In order to facilitate the installation of devices, especially those of greater weight such as audio amplifiers,
mounting brackets are fitted inside. If a call station (firefighter's microphone) is to be mounted in the rack, a
dedicated pull out shelf will be added to facilitate the use of the microphone.
The equipment installed inside the cabinet can be accessed via the glass front doors, removable side
walls, and rear doors. In addition, the use of two types of locks, separate for the front and rear doors, restricts
unauthorized access. The cabinet can be mounted on a metal base with a height of 100 mm or wheels allowing it
to move freely.
Fig. 2. Sample configuration of a DSO cabinet.
Table 1. Components of RACK cabinet.
Element
no.
Description
Batteries
LZxx-PRA safety strip
PSG3LA LED panel for optical and acoustic indication.
230 V AC LDxxxx voltage distribution terminal.
Compartment for DSO equipment: power supply units, system driver, amplifiers,
firefighterʹs
microphone.
RAWP600RZ fan panel with a thermostat (optional).
