FAQ & Site Info

Why can’t the combustible gas detector be directly connected to the fire alarm control panel? The combustible gas detection alarm system, like the electrical fire monitoring system, is an independent subsystem of the automatic fire alarm system, and belongs to the fire early warning system. Combustible gas detector is a kind of preventive alarm which responds to single or multiple combustible gas concentration and realizes regional security monitoring. Generally, it is combined with combustible gas alarm controller and fire alarm to form a combustible gas detection alarm system. The combustible gas detection and alarm system should be composed independently, and the combustible gas detector should not be connected to the detector loop of the fire alarm controller. When the alarm signal of combustible gas needs to be connected to the automatic fire alarm system, it should be connected to the combustible gas alarm controller. According to the requirements of the code, the combustible gas detection and alarm system is an independent subsystem composed of combustible gas alarm controller and combustible gas detector, but the combustible gas detector can not be connected to the bus of the fire detection and alarm system. Why can’t the combustible gas detector be directly connected to the fire alarm control panel? 1.The meaning of alarm signal of combustible gas detector is different from that of conventional detector. 2.The protection area specific combustible gas alarm refers to its concentration exceeds the set threshold and it is an early warning signal, the alarm is uncertain of fire. 3.The working current of combustible gas detector is large, generally requiring dozens of milliamps, while the working current of heat and smoke detector is about 3mA. If the combustible gas detectors are connected to the bus line of fire alarm system, the current is too large for the controller, and the false alarm rate is high. 4.The combustible gas detector usually needs to be re-calibrated half a year, which affects the system work. 5.The working life of combustible gas detector is different from that of conventional fire detector such as smoke detector and heat detector, which needs to be replaced in 3 to 4 years. When the output signal of the alarm relay of the combustible gas detector is connected to the fire alarm system through the input module, the operating state of the combustible gas detector can only be known on the fire alarm host, but the field gas concentration value cannot be known. Using the gas alarm controller, you can see the gas concentration value in real time, and even have the curve of concentration change, so it is easier to understand the trend of gas concentration in the field. https://vedard.com/blog/combustible-gas-detection-is-a-subsystem/

There are many toxic, flammable and explosive gases in production and life.If there is no gas monitoring alarm and control equipment, flammable, explosive and toxic gas leakage will cause serious casualties and property losses. Toxic flammable and explosive gases include hydrogen sulfide, carbon monoxide, oxygen, sulfur dioxide, phosphine, ammonia, nitrogen dioxide, hydrogen cyanide, chlorine, chlorine dioxide, ozone and flammable gas. Gas monitoring alarms are divided into civil and industrial types. Civil gas detection alarm systems are mainly used for gas detection and alarm in public places and families. Industrial gas monitoring alarm is mainly used in petroleum, chemical, metallurgical, coal, liquefied gas and other enterprises. The gas detection and alarm system is composed of gas alarm controller, gas detector and fire alarm, which can alarm in advance when the concentration of leaked gas in the protected area is lower than the lower limit of explosion, so as to prevent the occurrence of fire and explosion accidents caused by gas leakage. The combustible gas detection and alarm system should be composed independently. The combustible gas detector should not be connected to the detector loop of the fire alarm controller.When the alarm signal of combustible gas needs to be connected to the automatic fire alarm system, the combustible gas alarm controller should be connected. Why should the combustible gas monitoring and alarm system be a subsystem? The combustible gas detection and alarm system must be regarded as an independent subsystem which consists of the combustible gas alarm controller and the combustible gas detector.The combustible gas detector cannot be connected to the fire detection and bus line alarm system. 1.Because the power consumption of combustible gas detector is very large, generally in tens of milliamps, after accessing the bus, it is very unfavorable to the stable work of the bus system. 2.The service life of combustible gas detector is generally only 3 or 4 years. After the service life, the normal work of fire detector connected with the same bus will also be adversely affected. 3.The combustible gas detector needs to be calibrated every year, during which the normal operation of the fire detector connected with the same bus will also be affected. 4.The time and meaning of combustible gas alarm signal and fire alarm signal are different, and the processing methods need to be taken are also different. The combustible gas monitoring and alarm system has two kinds: bus system and multi-wire system. The operating status information of the combustible gas detector received by the combustible gas alarm controller should be transmitted to the graphic display device in the fire control room or the centralized fire alarm controller, but its display should be different from the fire alarm information. The combustible gas monitoring and alarm controller must be linked with the explosion-proof fan and the explosion-proof solenoid valve to close the gas valve and start the fan in time. https://vedard.com/blog/combustible-gas-toxic-gas-monitoring-system/

Carbon monoxide is a flammable gas and a toxic gas as well. According to the requirements of the design code for detecting flammable gases and toxic gases in petrochemical industry, only toxic gas detectors should be set up. Therefore, when choosing a detector where carbon monoxide is likely to leak, you should choose a carbon monoxide poisonous gas detector. Carbon monoxide detector can be used as a detection device for the poisonous gas carbon monoxide.Connect it to the combustible gas alarm controller in the combustible gas detection and alarm system.Carbon monoxide detector also has sound and light alarm, and can work independently to send the alarm signal on site. Most fires produce carbon monoxide, but early fires with inadequate combustion and smoldering produce large amounts.So carbon monoxide detectors can be used as fire detectors. When carbon monoxide detectors are used as fire detectors, they should be connected to the automatic fire alarm system. There are two types of carbon monoxide detectors for household and industrial use. Both types have sound, light alarms and CARBON monoxide concentration LCD displays. Industrial carbon monoxide detectors are explosion-proof. Domestic carbon monoxide detectors are available in both AC and DC modes.It can be connected to the home alarm system and send alarm signals through the alarm controller. Carbon monoxide detector is an important equipment for home safety. https://vedard.com/blog/co-carbon-monoxide-detector/

Combustible gas refers to a gas that can ignite or explode when exposed to fire, heat or oxidant. It usually includes the combustible gases formed after gasification of class A combustible liquids and Class A (Aa, Ab) and Ba as shown in table below. The combustible gas detection and alarm system referred to in the code of fire prevention for building design is not only combustible gas, but also combustible vapor or dust. In combustible gas detection and alarm system, explosion lower limit (LEL) is the main technical parameter, that is, explosion concentration lower limit.We should first understand the range of explosion concentration. The range of concentration (volume ratio) within which a mixture of flammable vapors, gases, or dust and air can explode in contact with a ignition source is called the explosive range. Each combustible material in the air explosion range has a certain value, lower or higher than the concentration of this range will not ignite. Therefore, the lower explosive limit (LEL) refers to the lower explosive concentration value (V%) of combustible gas.The minimum concentration at which a mixture of flammable vapors, gases, or dust and air will explode when exposed to a fire. That is: Generally speaking, the alarm value of combustible gas concentration detection and alarm device is 25% or lower than the lower limit of the flammable gas explosion. Combustible gas alarm value = lower limit of explosion (LEL) x 25% https://vedard.com/blog/lower-explosive-limit-of-combustible-gas/

Gas is the main energy source for heating and cooking in daily life. Now almost every household has installed gas pipeline, which provides great convenience for daily life.However, gas is also associated with certain dangers, especially in the case of improper use and caused gas leakage, which may lead to fire or explosion.One would ask, Can nobody know when a gas leak occurs?State regulation requires gas must do smell treatment before sent to the user’s home. It is to prevent gas leakage without notice of people. In many cases, the gas has accumulated in the space to the point that a small flame or friction spark can trigger a fire or explosion when user discovers a gas leak.What to do in this situation?Gas alarm can prevent gas leakage, the gas level has not reached the point of fire, alarm will go off to remind users. The effective rate of accident prevention is more than 90%.Usually everyone is working out of home, or go out for travelling, how to prevent accident when people is not at home?The gas alarm is connected to the solenoid valve. When gas leaks, the gas leak detector drives the solenoid valve to automatically close and cut off the gas source.Even if no one is at home, the security system will ensure the personal and property safety of you and your family at all times and avoid the disaster of fire and explosion caused by gas leakage. Take natural gas as an example. When the concentration of natural gas in the air is within the range of 5% ~ 15%, it will mix with the air (or oxygen) evenly. At this time, if it encounters a small flame or friction, it will explode.Other types of gases have different explosion minimum valve. If the gas alarm is connected with solenoid valve, once it detects that the gas concentration in the air reaches 5%LEL (explosion limit) or above, the gas alarm will send signals to the connected solenoid valve and drive it to work and turn off the gas source. Because the solenoid valve is driven to work by the gas detector, if the detector installation position is not correct, it will cause a false alarm, and indirectly lead to the wrong solenoid valve work.So the installation position of the detector must be correct. It should be installed at different position according to the gas to be detected. After the correct installation, you can press the alarm test button to check whether the alarm is running normally.The schematic diagram of proper installation of the gas alarm is shown as follows: Gas leakage shut off valve can be divided into manipulator and solenoid valve. According to the use of object manipulator can be divided into pipe manipulator and cylinder manipulator. Solenoid valve can be divided into pipe solenoid valve and hose solenoid valve. Pipeline manipulator is relatively easy to install, just install it in the gas pipeline valve switch.When receiving the signal from the gas alarm, the manipulator will automatically close the gas pipeline valve switch. The cylinder manipulator is used for cylinder liquefied gas, which is installed between the cylinder and the pressure reducing valve. When receiving the signal from the gas alarm, the manipulator will automatically block the gas output channel to prevent the gas from being output again. Pipeline solenoid valve is installed in gas pipeline. The pipeline between the gas meter and the pipeline inlet should be cut off and install the solenoid valve (this is a professional operation, must be installed by professionals of gas company, otherwise accident consequences may be caused). When receiving the gas alarm signal, the solenoid valve internal slider will slide down to block passage of gas, when disarmed, need to manually upward reset button, to restore the normal use of fuel gas. Hose solenoid valve can be used for the hose of liquefied gas tank or hose gas pipe, used for liquefied gas bottle. Solenoid valve is installed between the pressure relief valve and hose, different from the pipe solenoid valve is the former has straight valve, hose solenoid valve has a head for the pointed nozzle valve, and the same principle of work as the pipe solenoid valve. https://vedard.com/blog/connect-solenoid-valve-with-gas-detector/

There are two types of smoke alarm according to different types of sensors. They are ion smoke alarm and photoelectric smoke alarm. The ion smoke detector has an ionization chamber. The intensity of americium 241(Am241)used in the ionization chamber is about 0.8 u Curie, which is in equilibrium under normal conditions. However, if smoke enters into the ionization chamber, the equilibrium relationship will be destroyed, and an alarm will be given out when the smoke concentration reaches a defined value. There is an optical chamber in the photoelectric smoke detector and an infrared counter tube is installed. When there is no smoke, the infrared receiving tube can not receive the infrared light from the infrared transmitting tube. However, if there is smoke entering into the optical chamber, the smoke is refracted and reflected, the receiving tube will receive the red light. The intelligent alarm circuit judges whether the smoke density is exceeded. If the smoke density value is exceeded, it will give out alarm. What is the difference of these two types smoke alarm? The ion smoke detector is more sensitive to small smoke particles. In open fire (such as burning newspaper) and fast burning fire, there are more small particles in the air, and the ion smoke alarm will make alarm first than the photoelectric alarm. Photoelectric smoke detector is sensitive to larger smoke particles. When smoldering (such as cigarette igniting sofa), there are more larger smoke particles in the air. At this time, photoelectric smoke detector will make alarm first than ion smoke alarm. The ion detector has radiation, which will cause bad effects on human health, while the photoelectric detector will not have any impact on health, so photoelectric smoke alarm is always used for home security. https://vedard.com/blog/what-type-smoke-alarm-is-better/

Electric fire monitoring system is early warning of fire. Before fire occurs, the electric fire detectors can send out alarm for notice. Electric fire monitoring is sub-system of fire alarm system. The electric fire monitoring system consists of electric fire monitoring panel, combined electric fire detector, residual current detector and heat detector. These components should consist a system and then the electric fire monitoring panel connects to central fire alarm system. The electric fire alarm is early alarm before fire. So, the alarm information should be dealed separately. How to set up the electric fire monitoring system? 1. In each power distribution cabinet, install an combined electric fire detector. It has function of 8 channels of accepting residual current detection or high temperature input. It will then be connected with electric fire monitor panel via 485 or 2-wire polar-bus wire. 2. Every loop live and neutral wired should go through a residual current detector. Then the outlet connect with combined electric detector. Video guide set up electric fire https://www.youtube.com/watch?v=bGVv8ZHmCDs

Gas fire extinguishing device and foam fire extinguishing device usually adopt independent fire extinguishing controller. When the fire detector in its protected area is directly connected to the fire extinguishing controller, the alarm linkage control of each stage and the feedback signal of the system shall be immediately fed back to the fire extinguishing linkage controller, and the fire extinguishing linkage controller shall start the alarm linkage control process according to the specification requirements. After the fire linkage controller receives the feedback signal, is it necessary to activate all the fire audible and visual alarms and fire broadcasting in the building? Is it necessary to turn on the smoke control and exhaust system and the emergency lighting evacuation indicator system? When receiving confirmation after a fire alarm signal, sound and light alarm should start building all fires, fire emergency broadcasting, should start the fire related area of the exhaust system (such as evacuation aisle, etc.) start the fire smoke of fire zone system, and should press the fire emergency lighting and evacuation indicating system technology standard to start the emergency lighting evacuation indicator system. Refer to fire alarm and fire fighting diagram and manual at fire alarm. There are three starting modes of the gas fire extinguishing system: automatic starting, manual electrical starting and mechanical emergency operation. The automatic start of the gas fire extinguishing system is divided into manned protection area and unmanned protection area Manned area: 1. In case of fire, the first detector (mostly smoke) in the protection zone sends a signal to the gas fire extinguishing controller, and the gas fire extinguishing controller starts the fire audible and visual alarm in the protection zone, and the gas fire extinguishing controller feeds back the alarm signal to the fire linkage controller. At this time, the sound and light alarm will alert the personnel in the protection area of fire, fire confirmation or emergency escape, but will not start the gas extinguishing device; 2, if no intervention at this time, the fire, the first two detectors (mostly heat) induction after the fire, the protection zone of acousto-optic alarm sounded at once, and now have been able to determine the fire really happened, then the gas fire extinguishing system, ready to start the system into the 30 s delay phase, in the delay phase, researchers continue to escape, And the system will make some preparations for the gas release, such as: 1) Close the air supply (exhaust) fan and air supply (exhaust) valve in the protected area: 2) Stop the ventilation and air conditioning system and close the electric fire valve set in the protected area; 3) Linkage control the start of the opening closure device in the protection area, including closing the door and window in the protection area; (In this delay stage, if someone finds that the fire has been extinguished, they can press the "emergency stop button", then the system can still stop immediately, but once the delay time is exceeded and the next control link is entered, the emergency stop will be ineffective.) 3. After the preparation stage of 30S, the closure of the shutdown and the evacuation of the personnel should be completed, then the system controls the gas to spray and implement the fire extinguishing: Firstly, control and open the head valve of the starting gas cylinder in the corresponding protection area to release the starting gas; ② Start the gas to open the selection valve of the corresponding protection area. After passing the selection valve, open the cylinder valve of the fire extinguishing agent bottle group to release the fire extinguishing agent; ③ Fire extinguishing agent can be opened through the selection valve, spraying into the corresponding protection area; The pressure signal device set on the pipeline is triggered in the process of discharge, and the pressure signal device can feedback signals to the linkage controller, and then control the "exhaust indicator light" outside the protection zone to light up, prompting not to enter the protection zone. unmanned protection area: As there is no protection zone, the relative "someone protection zone" control do not need to consider the process of evacuation, therefore in the protection zone of the first a detector signal sensing after the fire, will immediately close the valve, close the door, shut the fan action instruction, (you can see it no matter what kind of control, all want to consider the utilization of the gas discharge, The protected area needs to be closed), when the second detector detects a fire, immediately open the selection valve and other subsequent operations Manual start Manual emergency start can be achieved in two ways. One is the "emergency start" button outside the protection zone, and the other is the manual control button on the gas fire control controller. In this state, the detector sends out a fire signal and controls the host to start the indoor and external audible and visual alarms to notify the fire, but does not start the fire extinguishing system. At this time, press the "emergency start" button outside the protection zone or on the controller to start the fire extinguishing system, which will release fire extinguishing agent and implement fire extinguishing. Mechanical emergency manual start When the fire alarm control system fails, when both automatic and manual emergency start fail, and when the staff on duty judges it to be a fire, they should immediately inform all the personnel on site to evacuate the site. After all the personnel are confirmed to evacuate the site, mechanical emergency operation can be carried out according to the following steps: 1) Manually turn off the linkage device and cut off the power supply; 2) Pull out the "mechanical emergency start safety pin" on the electromagnetic drive of the start bottle in the corresponding protection zone, press the mechanical emergency start button, and the electromagnetic drive will open the start bottle to release the start gas and start the gas fire extinguishing system.

Use centralized control alarm system input module to connect it. It can monitor the fault and alarm information.

Remove and re-wire the input wire. If it is still active, the diode or resistor inside the isolation module has been broken down and the isolation module should be replaced.

You can use a solenoid valve to start the extinguishing agent bottle.

Need to use a two-speed fan, high speed exhaust smoke, low speed exhaust air.

Find the leaking cabinet, unplug the device's signal cable, and then re-register the host. Reconnect the wires after repair and re-register it on the host.

1. Please check whether or not the network is ok. 2. If the network is ok, please check the setting of fire and fault etc.

1. IG54 is a gas extracted from the air that does not harm the equipment. 2. HFM-227E gas may pollute the atmosphere, but it does no damage to equipment.

The exhaust valve is opened by the two-point linkage of the main panel, and the feedback signal of the exhaust valve is connected to the conventional alarm panel at a single point to start the fan.

Firstly, we need to analyse the function requirements. 1.What system is needed? Access control, CCTV, intruder alarm with fire detection all three systems are needed or not? Will the 3 systems work together on a platform for management together or separately? 2.What network to use for alarm sending? PSTN, GSM/GPRS 3G/4G, TCP/IP? 3.What type of alarm information sending and how to monitor the security system? Voice call, email, app prompt, sms? Need to send image and monitor the protected area video or not? 4.Need to remote control house appliance? If yes, need to add the smart socket. Secondly, we need to analyse the application requirement. 1.How many windows? Need to use windows contact switch or curtain PIR or both? 2.How many doors? Need to use door contact. 3.How many floors? Need to use PIR motion sensor at at the top of each staircase. 4.What is the longest distance between sensor with alarm panel? If more than 100m, then wireless repeater is needed. 5.How many siren strobe to use? Each floor can have one installed. 6.How many smoke detectors to use? Every bedrooms, staircase, living room should have the smoke detectors installed. 7.How many gas detector to use? At least the kitchen room should have the gas detector installed. 8.How many security camera to installed? The garden, courtyard, balcony, the gate entrance, all floors staircase should have security cameras for monitoring. 9.More other security sensors such as CO detector, heat detector, water leakage detector, panic button can be added according to needs. 10.Outdoor security protection of fence, garden, wall, windows and balcony. New technology solar power wireless infrared break beam, infrared grating and outdoor solar power PIR motion sensor can be used for outdoor security easy. If use outdoor windows infrared grating, then the indoor windows contact or motion sensor can be removed. Building terrace, balcony, French window is the key area of safety protection. Solar power wireless break beam system can be used for the protection. The security protection areas can be divided into indoor security area, outdoor security area and perimeter security area. The key security area may have double types security equipment such as security camera and infrared grating installed. Security system can be set arm/disarm timer and automatically armed disarmed. Other alarm accessory such as remote controller, keyboard can be used to send alarm, receive alarm information and inquiry system status easy.

https://www.vedardsecurity.com/Tiancheng-Fire-Alarm-Manufacturer-ezp-40 Tiancheng Fire Security Equipment Co., Ltd (hereinafter referred as to TC) specializes in design and manufacture of high quality fire alarm and security control equipment for commercial, industrial and residential security protection. TC fire alarm security system manufacturer has nearly 30 years experience in the field of fire security equipment development and manufacturing. TC fire alarm adopts advanced technologies: IoT, big data, cloud computing to launch its Smart TC series including [Smart Fire Protection", [Smart Home Safety" with different APPs available. TC is certified by ISO9001, ISO14001 and ISO18001. Our products are certified by CCCF, LPCB, CE and GOST. Our corporate philosophy is based on high quality, high efficient service and reasonable prices.

https://www.vedardsecurity.com/beam-smoke-detector-ezp-39 Linear infrared beam smoke detector is a fire detector that detects smoke by using the dimming principle. Relative to the point type smoke detector, Linear light beam smoke detector is suitable for large Spaces without shelter Or a room with special requirements. Linear beam smoke detectors usually include a transmitter and a receiver. An infrared detection optical path is formed between the transmitter and the receiver. When the smoke rises the beam is blocked and the beam received by the receiver is weakened. When the reduction rate reaches the preset value, The detector will send out a fire alarm signal. Linear light beam smoke detector with smoke sensing fire detection function. At the same time, it can recognize a certain degree of dust pollution, and it can send a fault signal when it is blocked. Linear light beam smoke detector is suitable for large space fire detection where smoke is formed in the initial fire. According to the optical path form, the detector can be divided into two types: reflector type and reflector type. The transmitter and receiver of the counter - fire detector are arranged separately. The infrared beam is sent from the transmitter and received by a receiver at the other end. This form of wiring is relatively complex. In general, Both the transmitter and receiver need to be supplied with power. The reflective detector integrates the transmitter and receiver, The other end is fitted with a reflector plate, An infrared beam is emitted from the transmitter, It is reflected by the reflector plate and received by the receiver. Reflector, also known as mirror, does not need to provide power supply, wiring is relatively simple. The maximum distance between the detector's transmitter and receiver should not exceed 100 meters. The minimum distance is determined according to the product parameters of different manufacturers. Linear light beam smoke detector should be set up in accordance with the following provisions: For Spaces greater than 12 meters high, Select two or more fire detectors at the same time. Places that produced a lot of smoke in the early days of the fire, Linear light beam smoke detector, pipeline suction smoke detector or picture type fire detector should be selected.

https://www.vedardsecurity.com/Wireless-fire-alarm-system-ezp-38 Fire monitoring and prevention systems are required for all buildings. For residential fire prevention, you can connect smoke detector, heat detector, CO detector, combustible gas detector and other fire detector monitoring and alarm. But for commercial buildings, factories, warehouses, shops and other places need to use a professional fire alarm system. Professional fire alarm system can link automatic fire extinguishing equipment and so on. In a short time of fire can immediately point out the fire location, start the evacuation warning. The fire develops rapidly and causes huge loss of personnel and property. In addition to people strictly following fire regulations and rules and precautions for the use of open flames, fire alarm systems should also be set up. According to the size and use of the building site, the fire alarm system shall be set up in accordance with the requirements. Read https://www.vedardsecurity.com/FIRE-ALARM-SYSTEM-TYPES-ezp-25 Traditional professional fire alarm and linkage system can monitor danger in real time and extinguish fire automatically. But it is complicated to install. Grooves need to be dug to lay cables. When a fault occurs, it is difficult to check and maintain the line. Wireless fire alarm linkage system has become a substitute. But the reliability of the wireless alarm system is uncertain. Therefore, the wireless fire alarm system is only recommended for small commercial buildings and shops, beauty salons and other small and medium-sized places. Professional wireless fire alarm system contains all kinds of fire detectors and fire hydrant buttons, and has a linkage output 485 interface, can be connected to the traditional wired alarm host. Can link automatic fire extinguishing device. Professional wireless fire alarm system is easy to install. There is no need to lay cables, and the probe can be easily programmed through PC management software.

https://www.vedardsecurity.com/Residual-current-electrical-fire-detector-ezp-37 Residual current electrical fire detector is used to monitor the change of residual current value in the protected line. When the residual current in the protected electrical line exceeds the alarm set value, it can send alarm and control signals. It is generally composed of residual current sensor and signal processing unit. The residual current sensor measures the change in the residual current value in the protected line. Generally, a high magnetic conductivity core material with a closed ring is used. (such as high-permeability nickel steel or supercrystalline alloys) When the residual current passes through the protection line of the sensor, the sensor will induce the data and send it to the signal processing unit. The signal processing unit receives the measurement data of the sensor and analyzes the data. A signal processing unit can be connected to multiple sensors. Residual current sensors can be divided into circular sensors and rectangular sensors according to their appearance. Circular sensor is mainly suitable for cable passing. According to the system form, the residual current electrical fire monitoring detector includes two types: independent and non-independent. Independent detector with sound and light alarm function, can be used independently. The non-independent detector can be connected to the upper level equipment (electrical fire monitoring equipment) through the signal processing unit, and the system function can be realized by the electrical fire monitoring equipment. It doesn't work independently.

https://www.vedardsecurity.com/gas-fire-extinguish-ezp-36 The gas fire extinguishing control system mainly consists of gas fire extinguishing controller, fire detector, manual automatic switch, emergency start and stop button, sound and light alarm, gas spraying indicator light and so on. The fire detector generally adopts smoke fire detector and temperature fire detector. In special cases, manual alarm buttons or other types of fire detectors can also be used. Gas fire extinguishing controller linkage control gas fire extinguishing equipment, linkage control fan, air valve, fire valve, ventilation and air conditioning, automatic doors and windows and other equipment, and receive feedback signals. For the carbon dioxide fire extinguishing system can also receive the weightlessness alarm signal, weightlessness alarm. The gas extinguishing system shall be controlled by a dedicated gas extinguishing controller. The gas fire extinguishing controller is used for linkage control of the gas fire extinguishing system. It mainly includes: Gas extinguishing controller with fire detection and alarm function. This controller can be connected to fire detector and various linkage control modules, with automatic fire alarm and gas fire control functions, can be used as an independent system. In case of fire, the gas fire control controller will receive the fire alarm signal from the fire detector or the manual alarm button and issue the linkage control command. Perform gas fire control. Gas extinguishing controller without fire detection and alarm function. This controller has only a single gas fire control function and must be used in conjunction with the fire alarm controller. The fire detector is connected to the fire alarm controller. In case of fire, fire alarm controller receives fire alarm signal from fire detector or manual alarm button, give instructions to the gas fire control controller, and then the gas fire control controller linkage control related components to implement the gas fire extinguishing. Fire detectors with high sensitivity should be selected in the protection area to alarm and extinguish fire early. Two different types of fire detectors should be used in the protected area, usually smoke fire detectors and heat fire detectors. Special places can also use other types of fire detectors or manual alarm buttons. According to the specification requirements, the protection area of each type of detectors should be calculated separately and equipped with cross. Sound and light fire alarm should be set inside the protected area. When the first fire alarm is received, activate the fire sound and light alarm inside the protection zone to warn personnel to evacuate. The exterior of the exit of the protection zone shall also be equipped with a fire sound and light alarm. When the fire alarm is confirmed, activate the sound and light fire alarm outside the protection zone. The upper part of the outlet of the protection zone shall be equipped with a deflating indicator light. When the gas extinguishing controller receives the feedback signal of the signal feedback device, start the exhaust indicator light to warn personnel not to enter. The pipe network gas extinguishing system has three starting modes: automatic control, manual control and mechanical emergency operation. The fire extinguishing device of the prefabricated gas fire extinguishing system is set in the protection zone, and personnel must evacuate in case of fire. Therefore, the prefabricated gas fire extinguishing system has only two starting modes: automatic control and manual control. In the state of automatic control, there are generally two ways to control gas fire extinguishing: The first method is smoke and temperature composite alarm linkage. This is the most common control. In the gas fire protection area, smoke fire detector and temperature fire detector are generally equipped. When a detector gives an alarm, it activates the sound and light fire alarm in the protection zone, a different type of fire detector also alarms, then the fire alarm information is confirmed. Start the fire alarm outside the protection zone, and send out the linkage control signal at the same time. Fire extinguishing start instruction will be issued after 0-30 seconds delay, and fire extinguishing device will be started. The second method is the linkage of two independent fire alarm signals. In some special places, other types of fire detectors may be required. A manual alarm button may also be available. The different detectors are classified, and the linkage alarm and fire alarm are confirmed according to the above composite way of smoke and temperature sensing. No matter the system is in automatic control state or manual control state, the manual control of gas fire extinguishing is always effective. Manual control is implemented through the emergency start-stop button. Emergency start/stop buttons must be installed at the exit of the protection zone. The gas extinguishing controller also has an emergency start/stop button on the control panel. Emergency start and stop buttons include emergency start and emergency stop buttons. After pressing the emergency start button, the gas fire control controller sends out linkage control signal, fire extinguishing start instruction will be issued after 0-30 seconds delay, and fire extinguishing device will be started.

https://vedardsecurity.com/TC5109-Fire-Alarm-Controller-Function-ezp-54 TC5109 Fire Alarm Controller Functions 1. Fire Alarm Monitoring Detect fire signals from addressable smoke/heat detectors, manual call points, and other fire-sensing devices. Display the first/last fire alarm, zone location, device address, and time stamp in real time. Trigger fire alarm output (HJ+/HJ–) and sounder strobe for on-site audible-visual alert. Fault Detection & Indication Monitor system faults: main power fault, battery fault, loop communication fault, system fault. Monitor field device faults: detector fault, module fault, sounder strobe fault, FPE fault, zone fault. Output fault relay signal and show fault information on LCD and LED indicators. 2. Device & Zone Management Support up to 4 loops, max 255 addressable points per loop, total 1020 points. Support up to 48 zones with independent fire alarm and fault/disable indicators. Support device registration, query, definition (second code, type, attribute, location note). Support zone/addressable point/sounder/FPE disable and enable. Linkage Control Automatically start/stop FPE devices (I/O modules, fire dampers, fire pumps, etc.) via logic linkage formulas. Support linkage action and feedback signal display. Support offline programming via USB for linkage logic and device notes. System Operation & Control Three-level authority control with password protection (Level I/II/III). Functions: mute, reset, self-test, silence/resound sounder. Multi-language switch (Chinese/English) and time/print setup. Store up to 2000 pieces of fire alarm, fault, and event history logs. Communication & Networking Equipped with CAN and RS485 interfaces for CRT connection and networking. Support master/slave/stand-alone networking mode and information transmission /reception. Power Management Dual power supply: AC230V main power + 2×12V12AH backup battery. Battery charge control, internal resistance detection, and fault alarm. 24V power output for field FPE and sounder strobe. Display & Output 7-inch color LCD (800×480) for visual information display. Built-in printer for real-time printing of fire, fault, and event records. Multi-LED indicator panel for system status, zone status, and FPE status. 3. Installation & Maintenance Modular plug-in structure for easy installation, commissioning, and expansion. Loop short-circuit isolation via loop isolator to ensure system stability. Regular test guidance and common fault troubleshooting. addressable fire alarm system wiring Expandable Extended Functions 1. Loop Capacity Expansion
Standard 1 loop, expandable up to 4 loops; max 255 address devices per loop, total up to 1020 address points; support up to 48 fire zones. 2. Communication & Networking Expansion 
 Expand RS485 communication board for connecting CRT graphic display system and upper computer Expand CAN bus board for networked cluster control of multiple controllers Support wireless module access for wireless smoke detectors and manual call points Access to Tiancheng smart fire cloud platform for remote monitoring, reset, message push and video linkage 3. Linkage Control Expansion Control fire shutter, exhaust fan, fire water pump, damper and fire door via input/output modules Expand direct control panel for hard-wired emergency start of key fire equipment Connect gas extinguishing control panel for fire detection, delay and jet monitoring 4. Peripheral Hardware Expansion Equip thermal printer to print real-time fire, fault and linkage records Connect floor/layer display panels for on-site zone alarm information display Expand large-capacity backup battery pack to extend standby time after power failure Support external 24V DC power supply for peripheral fire devices 5. Software System Expansion Support offline programming via computer and download linkage logic to controller Historical event query, data export and traceability Compatible with full series of Tiancheng intelligent fire detectors, modules and alarm devices; mixed networking of new and old equipment

https://www.vedardsecurity.com/Fire-Fighting-Control-Ways-ezp-53 Differences and Applications of Automatic Control, Manual Control, and Mechanical Emergency Operation in Fire Protection Systems. Automatic Control Automatic control is commonly referred to as linkage control. According to code requirements, a fire alarm linkage controller shall be capable of performing control functions in both automatic and manual modes. Automatic control is centered on the fire alarm linkage controller. Alarm signals from detection and triggering devices are sent to the fire alarm linkage controller. The controller judges based on pre-set logic and issues linkage control commands to controlled fire equipment, thereby realizing fire linkage control. Automatic control is vulnerable to factors such as product and construction quality, operating environment, and external interference.Therefore, the linkage trigger signal shall adopt an AND logic combination of alarm signals from two independent detection/triggering devices, and shall be valid only when the fire alarm linkage controller is in the automatic state.Different systems or functional equipment have different requirements for linkage control. Example:Linkage control of fire audible and visual alarms shall be triggered by the AND logic combination of alarm signals from two independent detectors or one detector plus one manual call point within the same alarm zone. Manual Control Manual control in fire protection systems usually refers to electrical manual control realized via electrical circuits.It mainly includes remote manual control (fire control room) and local manual control. 1. Remote Manual Control (Fire Control Room) It mainly includes manual control via the fire alarm linkage controller and manual control via the direct manual control unit. Corresponding to the automatic control described above, the fire alarm linkage controller shall simultaneously be capable of manual control for each controlled device.In practice, a bus control panel can be equipped for simplified operation, providing a convenient way to start bus-controlled devices instead of complex menu operations.Automatic and manual control functions of the fire alarm linkage controller share the same communication bus. The direct manual control unit (also known as multi-wire control panel / direct manual control panel) is installed in the fire control room together with the fire alarm linkage controller. Critical equipment such as fire pumps, supply air fans, and exhaust smoke fans shall be capable of direct manual control from the fire control room via dedicated wiring between the start/stop buttons of the direct manual control unit and the local control cabinets of the equipment. Deluge valve assemblies, relevant control valves for water curtain systems, pre-action valve assemblies, and electric valves before the quick exhaust valve inlet of pre-action systems shall also be directly activated via the direct manual control unit using dedicated lines. Example:In a pre-action system, the actuator of the pre-action valve assembly, the electric valve before the quick exhaust valve inlet, and the starter cabinet of the fire pump set shall each be connected via dedicated lines to the multi-wire control panel of the fire alarm linkage controller for direct remote manual control in the fire control room.

https://www.vedardsecurity.com/The-Secondary-Code-Of-Fire-Alarm-System-ezp-56 The secondary code (also known as the user code or location code) of a fire alarm system is a 6-digit logical address set by the fire host for the equipment, used to identify the floor, zone, or specific location of the equipment, facilitating quick positioning in case of a fire alarm; It is different from the unique physical "primary code" of the device (usually the address numbers 001-242 within the loop). ‌ One time code: the unique physical address of the device on the circuit (such as 001-242), written by the encoder, equivalent to an "ID card". Secondary code: A 6-digit logical code set on the fire control host (such as "050308" which can represent Room 08, Zone 3, 5th floor), used for display and positioning. It is not built-in to the device and needs to be configured on the host or linkage panel. Different brands have different rules (such as the first 2 floors, middle 1 partition, and last 3 digits of the number) Setting the secondary code cannot be directly operated on the detector/alarm button, and must be done through the following steps: 1. Write a code to the device first (using a dedicated handheld encoder or base dip switch, with a range depending on the fire alarm host, usually 1-242); 2. In the "Equipment Definition" or "Bus Equipment Settings" menu of the fire control host, enter the corresponding circuit and primary code, and manually fill in the 6-digit secondary code; 3. Ensure that the secondary codes of the entire building are not duplicated and are compiled according to the unified rules of the project (such as floor+partition+serial number); 4. After setting up, it is necessary to register/learn device information on the host and switch back to the "monitoring state" to take effect. ‌

https://www.vedardsecurity.com/Debugging-Of-Automatic-Fire-Alarm-And-Linkage-Control-System-ezp-55 Debugging of automatic fire alarm and linkage control system: 1. Understand the project overview Before debugging the project, it is necessary to have a general understanding of the project and have a clear idea in mind. 2. Prepare for debugging With knowledge of the engineering site, it is necessary to organize the tools, accessories, and products or components to be replaced during debugging and maintenance. It is important to prepare well. If you are well prepared, you will be at ease with your work. On the contrary, if you are not well prepared, you will appear powerless in your work. So it is important to pay attention to the preparation work before debugging. 3. Debugging equipment The engineering debugging process is shown in the attached table 1) After the contract is signed, technical personnel will conduct a technical briefing to the construction party, so that they can understand our company's equipment and some issues that should be noted in the construction wiring. If the construction party is unclear, our technical personnel need to explain clearly. 2) Provide Party A with a linkage logic relationship table and request Party A to provide the linkage logic relationship. Based on this relationship, our technical personnel will write a linkage relationship table and store it in the computer for input into the host during project debugging. 3) Provide Party A with an address code table and request Party A to provide the address code of external fire protection equipment. Based on this code, our technical personnel will write an "English annotation" table and store it in the computer for input into the host during project debugging. 4) After receiving the commissioning notice, the commissioning personnel shall rush to the site in time, and first check the external lines to check whether there is any error in wiring, whether there is short circuit between lines, and whether there is open circuit in the lines. The resistance to ground of the circuit measured with a shake meter should be greater than 20M Ω. For a fully loaded circuit, the resistance between the circuit buses measured with the resistance range of the multimeter should be around 5K. If it is not normal, notify the construction party to correct it in a timely manner. If everything is normal on the external line, it can be connected to the host. 5) Before connecting to the fire host through an external line, it is necessary to run a short circuit test on the host. Connect the 220V host fire protection dedicated power supply. Run and test the host without any load (including return lines, dedicated control lines, and all external lines). Is the recording function functioning properly. If there is a malfunction, it should be resolved immediately to ensure the normal operation of the host. 6) After connecting the external line to the host, setting up the host mainly includes the following process: a. Set the networking mode of the local machine When the local machine is set to "multi master mode", it can receive alarm information, fault information, and linkage information from other hosts in the network; When the local machine is set to "slave mode", it does not receive alarm information, fault information, or linkage information from other hosts in the network. When the local machine is set to "multi master mode", it can receive alarm information, fault information, and linkage information from other hosts in the network through settings. If all controllers that make up the network are set to "multi master mode", then this network is a peer-to-peer network structure. b. Set local address When used for networking multiple controllers, the local network address ranges from 1 to 31. For a single controller, the local address can be set to any number from 1 to 31. If the local address is not set, the system will prompt "input error, please re-enter" when writing linkage programming operations. c. System configuration According to the specific configuration, set the "number of circuit boards", "number of bus control panels", "number of dedicated line control panels", and "number of gas fire extinguishing control panels". The range of bus control disks is 1 to 32; The number of dedicated control panels ranges from 1 to 8; The range of gas fire extinguishing control panels is 1 to 8.