2
. Main Function Introduction
2.1 DVA8-500W Features
◼Built-in 650W high-efficiency digital power amplifier, integrated 8 power A + B
independent dual-speaker loop zone output, each zone has independent LED indicator,
independent output control buttons and volume adjustment;
◼4 audio balanced input interfaces for playing any audio source in the zones
◼Local emergency PTT microphone input and emergency voice can be configured byPC
software to be played in specific zone.
◼Integrated independent MP3 module, support USB, SD card and radio functions;
◼Automatically detect the working status of each zone loop (fault, normal)
◼The 8-channel trigger input/output port can trigger the emergency voice preset by the PC
software to the specified zone or the corresponding external power source to the
corresponding event warning;
◼Support third-party emergency audio input (user-defined emergency audio source)
◼Integrated independent EVAC/ALERT voice information player;
◼The remote paging microphone / fireman microphone online interface can connect with
remote paging microphone and fireman microphone, each paging station connection uses
standard RJ-45 network port and standard CAT-5 network cable, voice transmission uses
balanced transmission mode for long-distance transmission;
◼Controller online interface can be connected to the slave unit, it uses standard RJ-45
network port and standard CAT-5 network cable;
◼communication interface, supports visual interface operation based on Windowplatform,
and the system status can be automatically synchronized.
◼Support DC24V battery backup power supply
◼With power amplifier monitoring function;
◼Support PTT recording function, no external equipment required;
◼System fault, dry contact output for emergency status, dry contact input foremergency
status reset
◼The zone output has three-wire and four-wire over-ridding adjustment functions;
◼With IP address reset function and impedance calibration function;
◼The master-slave unit is integrated, and the device can be used as a controller or a slave
unit by setting code address, and the maximum of 19 slaves can be simultaneously online;
◼The system can extend the number of the zones by slave units, it support 160 zones
maximum.
