Fire emergency broadcasting system networking exchange equipment wall mounted speaker

Fire emergency broadcasting system networking exchange equipment wall mounted speaker

Fire broadcasting system (withCCCFThe fire broadcasting system adopts a bus system, and the switching between broadcasting zones, normal broadcasting, and accident broadcasting is carried out at the host end. When a fire accident occurs in a certain fire compartment, the fire broadcast system immediately switches the background music broadcast of the area to the fire broadcast based on the received signal. Broadcast according to pre recorded fire evacuation programs, and commanders can also use microphones to direct firefighting or personnel transfer. The single voice playback time of the fire broadcast should be within10s～30sBetween them, it should work alternately with the fire sound and light alarm in a time-sharing manner, which can be adopted1 The infrasound light alarm plays,1or2The alternate working mode of the secondary fire broadcast is played in a cyclic manner. The fire broadcast system should ensure that the sound pressure level at the farthest point within its playback range is not lower than the background noise15dB. Cabinet size2260mm*800mm*800mmLeft door, cabinet colorRAL7035The cabinet is a closed structure with steel brackets and metal shells, and the protection level is not less thanIP43Can independently support. Adopting front and rear doors, double doors are used behind the cabinet, and the front door is a single leaf organic glass door. All doors should have handles, be lockable, and equipped with limit devices. Lighting fixtures should be installed inside the cabinet and controlled by the opening and closing of the door. A moisture-proof electric heater should be installed inside the cabinet, which is automatically controlled according to temperature and humidity. The cabinet is fixed by bolts and embedded foundation channel steel,There is a lifting ring on the top of the cabinet,The cabinet is protected with an anti rust coating. The screen (cabinet) surface should be flat and not dazzling.

Fire emergency broadcasting system networking exchange equipment wall mounted speaker

3.2 Broadcast control host: built-in6Road audio source, there is6Road stereo audio input,1The road microphone input allows for easy selection and control of external audio sources. ≥2roadRJ45The interface can connect the broadcast control host into the local area network, and conveniently set up and monitor the system operation through the computer terminals in the local area network using broadcast control software. The broadcast control hosts support networking through fiber optic cables.

Input:

Phone audio:1V

Microphone: 200mV

Line input1～6：200mV

Output:

Signal bus6Road audio signal (balanced): 6V

Frequency response:

Phone audio:100Hz～8000Hz ±3dB

Microphone:60Hz～12000Hz ±3dB

Line input1～6：60Hz-18000Hz ±3dB

High pitch adjustment10KHz ±10dB

Low frequency adjustment100Hz ±10dB

Signal to Noise Ratio:80dB

3.3 Call station and extended keyboard:

The call station configures an extended keyboard and function keys based on the number of partitions called1～8Corresponding zones can be pre-set, and when the on duty personnel need to call multiple zones, they can select a zone through pre-set function keys. The system can access up to8A call station.1Roadmap input, capable of music on-demand, calling, and mixing output3Type of pattern.

Technical requirements for call stations:

Sensitivity:-46dBV/PA

Frequency response:80Hz～16kHz

 Directionality/00/1800：＞20dB（1kHz）

Equivalent noise:25dBA（SPL）

 MaximumSPL：125dB（THD＜3%）

3.4 Partition Matrix Processor:

The input audio signal can be reasonably partitioned according to different requirements, with twenty partition selection outputs, and the function of playing different broadcast contents in different areas at the same time under the trigger of fire signals.

Technical requirements for partition matrix processor:

20Road music broadcasting signal input, connected to a normal broadcasting amplifier

20Road call fire broadcast signal input, connect call fire broadcast amplifier

20Road partition output, connection20Road partition speaker

1Road control signal input, receiving system control commands

Having128*64LCD display screen and one key shuttle control button

3.5 Control input processor: ≥20roadDC24VFire input interface,1roadRS485Connect the interface with the broadcast control host to achieve fire linkage function.

3.6 Telephone broadcasting interface:

Provide remote call broadcasting services for the broadcasting system, which can be connected to the user interface of the program-controlled switchboard, with automatic transfer of calls, and adjustable microphone volume and volume.

3.7 CD/MP3Player:

The internal circuit of the audio source in the broadcasting system adopts fully digital servo, with strong error correction capability, and should be compatible with various formatsCDandMP3；

Adopting high brightness dynamicVFDdisplay;

After being powered on, it can play automatically or be timed through remote control;

Frequency response:20Hz～20KHz

Signal to Noise Ratio:90dB

Harmonic distortion:0.005%

Shake: below the measurable limit

Output level:0dBV

3.8 ：

Twenty line inputs

Built in speaker

Partition selection

The volume can be controlled and adjusted

3.9 Sequential power starter

≥8Road power output;

Delay opening and delay closing power output

Fire emergency start

Timed on and off power output

RS232Serial port timed on/off power output for certain specific devices

3.10Constant voltage amplifier

The voltage output terminal has protection function, which can prevent output short circuit and accidental power line overlap; The emergency broadcast volume can be pre-set; Slow start function,2It can achieve full output in seconds, which is both fast, sensitive, and shock resistant.

Technical requirements for constant voltage amplifier:

Power output: determined according to the actual engineering situation

Line input:1V　10KΩ(0db)

Line output:1V　600Ω

Frequency response:20HZ～20KHZ±２db

Signal to noise ratio: ≥80db

Distortion: ≤1%　1/3rated power

Output voltage100VLoad impedance6.5Ω

3.11The speaker is equipped with a matching transformer, and the power of the matching transformer must be greater than the rated power of the speaker. The matching transformer is installed inside the speaker, while the ceiling mounted speaker is fixed together with the matching transformer for installation. The speaker is equipped with a volume switch on the line. Can be concealed or exposed.