【 Weak current College 】 posted: automatic fire alarm and fire control system configuration (points)---Power By 【 China power house network 】

In recent years, the Chinese fire industry to flourish and the computer and the introduction of modern communications technologies to enable the automatic fire-fighting facilities, intelligent level continues to improve, fire technology enables automatic fire alarm monitoring, automated process. Automatic fire alarm and fire control system has been widely applied to the fire, to detect and fight the fire in the early days, the protection of building personal and property safety plays an important role.

How can I make automatic fire alarm and fire control system in fire prevention role played great, this depends on the automatic fire alarm and fire control system design and construction, which design is particularly important. Designers in the automatic fire alarm and fire control system design, generally is based on the building's actual situation, follow the current national senior civil building design fire protection standard, the architectural design fire protection standard, the automatic fire alarm system design code, and other fire laws and regulations for the design, but for automatic fire alarm and fire control system of the host configuration, designers typically does not carry out a detailed design. Host configuration most are provided by the manufacturers and the manufacturers do not know much about the scene, often based on experience to configure. Therefore may cause configuration does not meet requirements, leading to address inadequate capacity, power capacity is insufficient, inadequate control points. Only by correctly selecting and configuring automatic fire alarm host device, you can design a reasonable compliance with specifications, cost and practical and reliable automatic fire alarm and fire control system.

Automatic fire alarm and fire control system is mainly composed of the following devices: host boards, circuit card, manual control panel, multiple wire system control panel, DC uninterruptible power supplies, fire emergency broadcast system, fire telephone systems, CRT system, chassis.

First, the host Board

Host the motherboard is the central fire alarm controller, for different products, depending on the different models. It determines the controller's maximum capacity and performance. Selection to first understand the project if they have a late project requires the sharing of this host, if you want to stay well ahead of the next issue of capacity; no direct calculation of this engineering of all device address points, while the number of under circuit card chosen host motherboard.

Second, the circuit card

Currently on the market are generally double-circuit card, single circuit card generally only used for very few points. Circuit card different from producers with relatively large differences in the selection must first understand the specifics of the product. If the NOTIFIER of AFP-400 and AM2020 series circuit card, with intelligent probes can be coded 99 only and monitor/control module, but only 99 NFS-640 and NFS-3030 series circuit card available only with the-159 and addressing code module 159 only. Same brand different series of circuit card number with the device are not the same, and the Gulf of circuit card you can bring the smart probe and addressing module mix take, with points to 242 points. Therefore, select circuit card, depending on the product of capacity and the fire prevention Division and the floor, to calculate the total number of loop, and then determine the circuit card number required. Generally each circuit also allow 15% to 20% of the margin expansion.

3. manual control panel

Manual control panel is a manual remote control operation of fire fighting equipment, belong to the bus control, mainly for the control of positive-pressure blowers, exhaust fan, elevators, radio, fire hydrant pump, spray pumps and other interactive devices. Select front should calculate the required control of total points. Then select is greater than the total points and stay 10% allowance.

Fourth, more wire control tray

More wire control tray is fire system back-up guarantee, its role is when alarm host for some reason does not work and human confirmed fire, need to start some devices will be used by the control panel. It is the control mode is a one-to-one correspondence with control equipment, connected with hard contacts, equivalent to the equipment, on-site start-up and shutdown button. For smoke extraction machine, positive-pressure blowers, fire pumps, fire linkage control device. The current market multi-line control panel will coincide with a module, the module is non-coding, the main role is to implement the fire alarm system of power and control equipment of strong electric isolation. Prevent device action, strong electric strings into the alarm system or else the alarm device. But it is important to note that this module is barred from coding control module, otherwise the multi-line control panel function will lose effectiveness when working in the host cannot cannot start the linkage between devices. More wire control tray on the control points according to the smoke machine, positive-pressure blowers, pumps, spray pumps and other fire linkage control equipment.

5. DC uninterruptible power supply

DC uninterruptible power in automatic fire alarm and fire control system for linkage control module and charged with the device powered. In the automatic fire alarm and fire control system is a priority, once it has problems, linkage system will face paralyzed. DC uninterruptible power supply is mainly composed of intelligent power-up and storage battery, to power the AC 220V as master, DC24V sealed lead batteries as backup power. Standby power supply should be disconnected from the mains after the equipment is working at least 8 hours. Selection of power plate should have output over-current protection, and standby power automatic switch and automatic charging and prepared by electric discharge protection. Power plate's selection of the main considerations are the following factors:
1. ensure that the output current of size meets the automatically State need to start up the device's current is required. Need to power-up power supply of the equipment: output modules, input/output module, sound and light alarm, alarm module, radio module, etc. If the fire-resistive load only plain, you only need to consider when configuring the steady current; if there are capacitive load, you should consider the impact of current or current. These modules typically inspection of current 5mA, startup current for measuring current of 7-10 times.
Formula as = 11 + 12, amps, where 1 =(5 × 50 × A + B)/1000, amps
A total number for modules, B for automatic state the number of devices you want to start. According to the linkage requirements underground fires should start all underground layer and a layer of interaction device instead of the standard layer of fire should be started when this layer and a layer up or down the adjacent to the linkage between devices. Including air valve, blowers, smoke machine, passenger lifts, elevators, cut off the non-fire-fire power, sound and light alarm, fire broadcasting, etc. The value to compare to B g and standard layer linked equipment, the large quantity as B.
12-Tel host, radio host, power amplifier, host Board and so the sum of the currents.
2. make sure the line voltage is loaded with enough when terminal equipment device driver. Conductor is resistance when the wire is very long, the line current is large, the pressure drop on the conductors will be more obvious. This could lead to terminal equipment voltage lower than the device's operating voltage and does the action.
Vm=V0-I×L×R
Vm-Terminal voltage, v; V0 to power up the output voltage, v; I-line current unit: ampere; L-cord length, unit: kilometers; R-conductor resistance unit: Euro/km.
3. when adopting the floor displays, because of their work are current and alarm current is greater than other devices, additional configuration is designed for the use of power and Chief floor display power supply line.
Each power-up is equipped with a set of batteries as backup power, host to the motherboard is equipped with a set of batteries as backup power.

6. fire emergency broadcasting system
Fire emergency broadcasting system is a fire evacuation and fire-fighting equipment, under the command of important throughout the fire control management systems play a very major role. Fire, emergency broadcast signal audio source device to the power amplifier by module switch to specify a range of speakers for emergency broadcast. Mainly by the audio source device, power amplifier and the output module, speakers and other devices. In place for shopping malls and other large selection of power amplifiers, three-layer should be able to meet all the requirements of the startup sound, the audio source device should have playback and recording function. If the landlord requires emergency broadcasting usually as background music for the speaker, the power amplifier power should select is greater than the sum of all broadcast power, the power amplifier will output overload protection causes no background music.

VII. fire telephone system
Fire telephone system is a dedicated communication systems for fire, fire phone can and know the scene of the fire and rescue, fire-fighting personnel informed. It has a bus system and much line two hosts. Bus system fire telephone system consists of fire telephone exchange, fire telephone interface module fixed fire telephone extension, fire phone jack, portable devices such as fire telephone extension. All the phone jack and phone extensions and host call must undergo telephone interface module. While many wire fire telephone system there is no telephone interface module, a route on the phone jack and phone extensions and much line telephone host Panel call operations key is one-to-one. General settings for each cell phone all the way.

VIII. CRT systems
CRT system for automatic fire alarm and fire control system with a graphical display, you can implement a simple, intuitive to system monitoring. Mainly by the computer, monitor, automatic fire alarm and fire control system operation software. Computer and the monitor can be purchased directly on the market, you only need to meet General WINDOWS Windows operating system. The automatic fire alarm and fire control system operating software is provided by the alarm device manufacturers. This system only in some of the more sophisticated place resort, general engineering can not be adopted.

9. chassis
When the above all systems are selected, you can select the chassis to be assembled. General of small systems with wall-mounted chassis, its small size, greatly facilitates installation. Mainly used for bathing and Dance Center, restaurant, small library, bars, supermarkets, substation, and other works. Major chassis has vertical cabinets and Cabinet with two stringed, mainly used for large residential quarters, large gymnasium, commercial office buildings, and other high-rise buildings. If you choose to use the CRT system is the best selection of stringed Cabinet. Because the Piano Bench Cabinet itself comes with a CRT monitor mounted platform, no additional purchase computer desk, etc. Each of the different types of chassis capacity is not like the following to Gulf products, for example for the selection of the chassis. It is first necessary to understand what each parts of the space dimensions:
GST9000 master disc 9UGST5000 master spare 6U fire manual disc 4U
More wire control tray 4U intelligent power plate 2UCD recording disc 2U
Fire phone host 2U300W amplifier 2U500W amplifier 3U
And then, depending on the project's configurations calculating capacity space needed, for example: Configuring the master disc 1 block GST5000, fire manual disc 1 block, more wire control Tray 1 block, intelligent power-up 2 blocks, CD recording disc 1 block, fire call host 1 bed, 1 single 300W power amplifier, total needs 24U space. Also equipped with 3 batteries placed on the chassis bottom, 6U space footprint, so the actual total required space 30U. Because CRT system is not configured, select vertical tank chassis. LD-1000A2-vertical Cabinet chassis Setup maximum space for 32U, LD-1000A5-vertical Cabinet chassis Setup maximum space for 36U. So just choose LD-1000A2-vertical tank chassis. When you configure the device capacity greater than 36U, you need to add a chassis.
These are my automatic fire alarm and fire control system configuration of some understanding that if there are anomalies look please give guidance of expert colleagues.

Reference documents:
[1] automatic fire alarm system design specifications (GB50116-98) [S].
[2] Bay fire alarm systemMarketing design specification (JB-QB-GST100) [S] .2008.
Author: Xiong-Hui (1977-), male, Xiushui, Jiangxi province, Jiangxi province Tong Sheng fire engineering co., Ltd., electrical engineer, research direction: automatic fire alarm and fire control system.