VAS PS21, Руководство по эксплуатации

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Constant voltage / Max current on nonswitced +24V
output
24-28V / 2A
Constant voltage / Max current on nonswitced +12V
output
12.2-12.6V / 2A
Constant voltage on switched 24V 24-28V
Max constant current on switched 24V 21A
Size (W/H/В) 3U (480/144/433)mm
Weight not more than 24kg
3 Description
3.1 Description of Power Supply unit.
Power Supply unit distribute power to any components of Public Address and Evacuation
management system which are calculated to supply from 12/24V unstabilized power.
Voltage change limit on 24V output with current 2A is from 24 to 28V.
Voltage change limit on 12V output with current 2A is from 12,2 to 12,6V.
When unit is supplying from 220V AC main circuit the total available power of
nonswitched outputs for 12V and 24V is 70W. In case of circuit voltage raise to 230V the total
available power will decrease to 60W. In case of circuit voltage raise higher than 230V the total
available power will decrease to 50W.
In case of excess above limits electric protection may switch off the outputs.
When unit is supplying by built-in batteries it can distribute following current from
powerful switched 24V output:
21A for VAS-PS-21
Unit has built-in battery charging and condition control system, as well as temperature
controller of each battery.
Attention! Backup output current should not exceed mentioned numbers, to supply
nominal charging regime.
Power Supply unit has two built-in relays to expand system capabilities. It allows to
commutate voltage to some loads such as amplifiers, evacuation light signs, electromagnetic
door locks etc.).
3.2 Structural diagram of the unit is shown of pic.1. Unit consist of following
components: Power supply and battery charging module, maintenance-free battery, control and
indication module, output voltage commutation relays.