Salco CS-2000 ANNUNCIATOR SYSTEM COMPONENTS 

ps-3.5 power supply

The PS-3.5 power supply converts 120 Volts AC 60 Hz into an output voltage of 12 Volts DC capable of supplying 3.5 amps. The power supply is housed in a standard 19" subrack enclosure which can be operated as a stand-alone system. When an uninterruptible 12 Volt DC power supply is required, the PS-3.5's AC line cord is inserted into the output of the APC model PS250 which is housed in a standard 19" subrack. Both the PS-3.5 power supply subrack and the APC PS250 subrack can be mounted in a 19" rack vertically adjacent to each other. During and AC power failure backup time is a function of the current drawn from the PS-3.5. When drawing a maximum of 3.5 amps, the backup time is approximately 30 minutes. When drawing 1.0 amps, the backup time is approximately 240 minutes (4 hours).