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Nine major configurations of fire alarm and fire linkage control system host
The fire alarm and fire linkage control system (FAS) in intelligent buildings is a very important subsystem in the building automation system (BAS). The reason for this is on the one hand because modern high-rise buildings have large floor areas, dense personnel, and many equipment materials. Many vertical holes in the building (elevator shafts, cable wells, air conditioning, ventilation ducts, etc.) make the possibility of fire increase. On the other hand, smart buildings are more technologically advanced and expensive than traditional buildings. In the event of a fire accident, equipment and systems, in addition to causing casualties, the damage caused by damage to various equipment and buildings is much more serious than the average building, so we can easily understand that in the fire alarm and fire fighting linkage In the control system, the importance of fire alarm systems is even more prominent. Fires are often only small in size and easy to extinguish in their early stages. However, due to the fact that fires are difficult to detect or prevent during the early stages of fire, fires are spread. Bring disasters to the system, which is for the safety and reliability of the system, technological advancement and network structure, system networking, etc. Put forward newer and higher requirements.
9 major configurations of fire alarm and fire control linkage control system host
Fire automatic alarm and fire control linkage control system host mainly by:
1 host motherboard, 2 circuit card, 3 bus linkage disk, 4 multi-wire control panel, 5 DC uninterruptible power supply, 6 fire emergency broadcasting system, 7 fire-fighting telephone system, 8CRT system, 9 chassis and other components.
No. 1 Host Motherboard
The main board of the host computer is the core component of the fire alarm controller, which determines the maximum capacity and performance of the controller. Different products and different models are different. When selected, the mainboard of the host must meet the required capacity of the project, and also consider whether there are re-building or expansion projects sharing the host, and whether it may change the use of the building and other factors, so as to determine the number of loop cards, and finally determine the selected host Motherboard.
No. 2 circuit card
There are two types of loop cards: dual-loop and single-loop, and there are many dual-circuit cards in the market. Single-loop cards are used for projects with few points. The circuit card is also different because of the manufacturer's differences. When selecting, you should know the specific situation of the product. Some circuit cards can only have intelligent detectors, some circuit cards can only have monitoring/control modules, and some circuit cards can mix intelligent detectors and addressing modules. Therefore, the circuit card is selected to calculate the total number of points for each fire prevention zone according to the fire prevention partitions and floors, and an expansion margin of 15%-20% shall be reserved according to the specifications to determine the number of loop cards.
No. 3 bus linkage disk
The bus linkage panel is a manual remote control operation panel of the fire linkage equipment, belonging to the bus control, and used to control linkage devices such as smoke exhaust valves, air supply valves, electric cuts, rolling shutter doors, elevators, and emergency lighting. The total number of points required for control should be calculated, and a margin of more than 10% of the total points can be used.
No. 4 multi-wire control panel
Multi-wire control panel is to control the start and stop of fire equipment, and should display its working status. It is the back-up guarantee of fire linkage system. When the automatic fire alarm control system cannot work normally, it needs the control panel used when starting fire-fighting equipment. The number of control points is one-to-one with the fire control equipment. It is connected by hard contact, which is equivalent to the on-site start/stop button of the equipment. It is also used for fire linkage control equipment such as smoke exhauster, positive pressure blower, fire pump, and spray pump.
No. 5 DC Uninterruptible Power Supply
DC uninterruptible power supply is a DC24V large-capacity power output device. In the fire alarm control system, it is used as the power supply of the linkage control system to supply power to the linkage control module and the controlled device. The power box uses AC 220V as the main power source, and has built-in DC24V sealed lead battery as backup power source. It adopts switching power supply voltage regulator circuit and standby power float charging circuit. It has automatic output over-current protection, active and standby power switching, and perfect standby power automatic charging. Over-discharge protection function. At the same time, the intelligent power box can monitor the main, backup and power output states. Can be reported to the main, power failure, output failure, but also has the output voltage, output current display, you can intuitively observe the working status of the power box.
1. Make sure that the output current can meet the current required to start up the most devices in the automatic state. The devices that require the power disk to provide power include output modules, input and output modules, audible and visual alarms, alarm bells, and broadcast modules. If the fire-fighting equipment is a purely resistive load, only the steady-state current is considered; if there is a capacitive load, the inrush current, ie, the operating current, should be considered. The patrol current of these modules is generally about 5mA, and the starting current is 7 to 10 times the patrol current.
2. Ensure that the voltage of the end equipment is sufficient to drive the equipment when the line is fully loaded. When the wire is long and the current is large, the voltage drop on the wire is obvious, and the voltage of the end device may be lower than the operating voltage and may not be able to operate normally.
3. When the floor display is used, since the operating current and the alarm current are much greater than other devices, the power supply panel specially designed for use thereof must be additionally configured, and the power supply dedicated line must be displayed on the floor.
4. Each power supply board must be equipped with a set of batteries as standby power supply, and the host main board must also be equipped with a set of batteries as backup power supply.
No. 6 fire emergency broadcasting system
The fire emergency broadcasting system is mainly composed of sound source equipment (with playback and recording functions), power amplifiers and processing equipment, output modules and lines, and loudspeakers. It is an important equipment for fire evacuation and fire extinguishing command. It is in the entire fire control and management system. Plays an extremely important role. In the event of a fire, the emergency broadcast signal source device sends a signal, which is amplified by the power amplifier, and the fire host drives the corresponding area module to implement emergency broadcast. For power amplifiers used in shopping malls and other large venues, the output power should be about 1.5 times the total power of the largest adjacent three-tier broadcast in the event of a fire. If the emergency broadcast is usually used as background music, the power of the power amplifier should be about 1.5 times the sum of all the broadcast power, otherwise the power amplifier will start overload protection and cannot output background music.
No. 7 Fire Telephone System
The fire-fighting telephone system is a kind of fire-fighting dedicated communication system, divided into two types: bus system and multi-line system. Through it, manual confirmation of fire can be quickly achieved, the situation of the fire site can be grasped in time, and it is easy to direct fire.
The bus-based fire-fighting telephone system is composed of a fire-fighting telephone main unit and a fire alarm controller, a fire-fighting telephone special-purpose module, a fire-fighting telephone socket, and a fire-fighting telephone extension provided at the fire control center bus system. The fire-fighting telephone special module is an encoding module that is directly connected to the fire alarm controller bus and needs to be connected to a DC24V power bus. In order to realize the transmission of telephone voice signals, it is also necessary to access a fire telephone telephone line. There is a telephone jack on the fire-fighting phone-specific module, which can be used directly by the bus-based telephone extension.
No. 8 CRT system
The fire alarm monitoring and management system of the fire control center of the CRT system is used to graphically display the automatic fire alarm and fire control linkage control system, which can realize simple and intuitive system monitoring. Mainly by the host computer, display, fire alarm and fire fighting linkage control system operating software, and CRT can be networked through local area networks, ordinary telephone lines, RS232, receive, send, display device abnormal information and host information, A remote central monitoring of the fire alarm system was realized.
No. 9 Chassis
When all of the above systems are selected, the chassis can be selected for assembly. General small automatic alarms and linkage systems use wall-mounted chassis, because of its small size, which greatly facilitates the installation of the project. This type of equipment is mainly used in bathing and dancing centers, restaurants, small libraries, bars, supermarkets, substations and other small projects; large chassis are mainly vertical cabinets and piano cabinets, mainly for large-scale residential quarters, large stadiums Large-scale buildings such as shopping malls, office buildings, etc.; if a CRT system is selected, it is best to use a cabinet cabinet because the cabinet cabinet itself has a CRT monitor mounting platform and no additional equipment such as a computer desk is required.