Network controller is the core of Praesideo system. It can

 simultaneously transmit up to 28 audio channels, power the system, report faults and control the system. The audio input can be broadcast from the call station, background music or local audio. Network controllers can be configured to suit the most complex public address systems. Configuration can be done easily and efficiently by PC. A PC is only required for configuration. After configuration, the controller can disconnect the PC and run independently. However, with the accompanying software, the controller can use a PC to display system status information. The device can be used independently on a desktop or in a 19 inch cabinet. PRS ￣ nco3 network controller requires PRS ￣ SW software version 4.0 or later. Basic function connection options the network controller has 4 analog audio inputs. Two of them can be switched between microphone input and line input. The other two are fixed for line input. The microphone / line input can be used as a call input if programmed with any of the eight control inputs. These control inputs can be specified for various system operations at will, and the priority can be freely selected. Line input provides optional 20 kHz pilot tone detection for cable monitoring. The controller has four analog audio line outputs, each with an optional 20 kHz monitoring signal. Three of the control outputs can be specified for fault or call, while the other two can be used to connect visual and acoustic fault indicators. A 24 VDC auxiliary output is currently available to power External visible faults and / or emergency lighthouses. Operation and performance users can fully configure the network controller through a PC equipped with the accompanying software, and the PC can also provide the current status information of the running system and appropriate and effective configuration. In addition, after configuration, the controller can disconnect the PC and run independently. The front panel features a 2 x 16 character LCD display and knobs for browsing menus and selecting menu items. The address, version, fault event and monitoring query can be completed by using the display screen and knob. The network controller can control up to 60 nodes. These nodes include devices such as power amplifiers, audio extenders, call stations, and call station kits. In order to meet the requirements of emergency voice system, the network controller provides the function of automatically releasing information. The controller is equipped with a removable CF card with installation capacity meeting the requirements of audio information storage. The system can play four messages at the same time. The system monitors information storage and information itself. Users can use the computer and download audio information (a set of WAV files) via an Ethernet link. In addition, the controller can also store a variety of prompt tones, test tones and alarm tones, and all of them can be accessed through any call station or control input for broadcast or alarm broadcast. The network controller has built-in buzzer, which is used to inform the fault or emergency. The internal real-time clock allows you to schedule events, such as playing scheduled broadcasts or changing the volume of background music at night. The controller has a variety of audio processing functions for audio input and output. Users can easily adjust parameter equalization, limiter and gain with configuration software. In addition, there is a headphone jack for monitoring the audio channel. The security network controller supports redundant network wiring. It can be used as either a branch network or a redundant loop. The system can handle 256 call priorities for hundreds of areas, and even meet the requirements of the most complex public address and emergency alarm system.

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