Question 2: Which controlled devices in the fire system need power, which do not need these facilities you said
All have to have 24v power supply, and signal lines.
Smoke, temperature, manual alarm fire hydrant They are alarm equipment, it's 24v and signal line is **** with. It is a line down to the host. Host internal automatic processing.
Alarm, audible and visual alarms, fire broadcasting, water flow indicator, smoke exhaust valve, air supply valve; these are linkage devices;
is the fire host, the alarm system receives smoke, temperature, manual alarm, fire alarm signal; to determine which part of the fire, to linkage of the above related facilities;
Alarm, audible and visual alarms, fire broadcasting, water flow indicator, smoke exhaust valve, air supply valve; this type of alarm equipment, it is 24v and signal line is *** with. Valve, air supply valve; this model and manufacturer of different, line connection can not be generalized. But the principle is the same.
These linkage devices, alarms, audible and visual alarms, fire broadcasting, water flow indicators, smoke exhaust valves, air supply valves; these devices are controlled through the linkage "module", there are signaling wires, and 24v power lines. The host controls the "module". The module is connecting the devices.
After receiving the fire alarm signal, the host gives a linkage signal to the module, and the module can only work after the module is activated.
Question 3: What does it mean to connect the control device (load)? With a certain measurement period (usually monthly) within the power consumption of the equipment divided by the number of natural hours of the arrived power and the percentage of the rated power of the equipment: (power consumption/statistical hours) / rated power * 100%. This allows an economic analysis.
Question 4: What is primary equipment? What is secondary equipment? Primary equipment refers to the generation, transmission and distribution of power on the main system of equipment used to prepare. Such as generators, transformers, circuit breakers, disconnect switches, buses, power cables and transmission lines.
Secondary equipment refers to the work of primary equipment control, protection, monitoring and measurement equipment. Such as measuring instruments, relays, operating switches, buttons, automatic control equipment, computers, signaling equipment, control cables, and some power supply devices (such as batteries, silicon rectifiers, etc.) to provide energy for these devices.
Question 5: What does ZigBee mean? Zigbee: The new wireless network data communication technology
Zigbee technology is with the industrial automation for wireless communication and data transmission needs and the emergence of Zigbee network power saving, reliable, low cost, large capacity, security, can be widely used in a variety of automation field.
The origin of Zigbee:
During the use of Bluetooth technology, it has been found that Bluetooth technology, despite its many advantages, still has many defects. For industry, home automation control and telemetry telecontrol field, Bluetooth technology seems too complex, power consumption, distance near, networking scale is too small, etc. ...... And the demand for wireless communication in industrial automation is getting stronger and stronger. It is for this reason that, after a long period of effort, the Zigbee protocol was formally introduced in 2004 after it was adopted in mid-2003.
What is Zigbee:
Zigbee is a wireless data transmission network platform consisting of up to 65,000 wireless data transmission modules, which is very similar to the existing mobile communication CDMA network or GSM network, and each Zigbee network data transmission module is similar to a base station of the mobile network, and in the whole network range, they can communicate with each other. Mutual communication; the distance between each network node can be from the standard 75 meters, to the expansion of hundreds of meters, or even several kilometers; in addition, the entire Zigbee network can also be connected with the existing various other networks. For example, you can monitor a Zigbee-controlled network somewhere in Yunnan through the Internet in Beijing.
The difference is that the Zigbee network is mainly established for automation and control data transmission, while the mobile communication network is mainly established for voice communication; the value of each mobile base station is generally in the millions of yuan, while each Zigbee base station is less than 1,000 yuan; each Zigbee network node not only itself can be connected with the monitoring of the object, such as sensors, for direct data collection and monitoring, but also with the Zigbee network nodes. Each Zigbee network node can not only connect to the monitoring object, such as sensors, for direct data collection and monitoring, it can also automatically relay the data transmitted by other network nodes; In addition, each Zigbee network node (FFD) can also be in the range of their own signal coverage, and more than one does not undertake the task of relaying the network information of the isolated sub-node (RFD) wireless connection.
Each Zigbee network node (FFD and RFD) can support up to 31 sensors and controlled devices, and each sensor and controlled device can have 8 different interface methods. It can collect and transmit both digital and analog data.
Application areas of Zigbee technology:
Zigbee technology is targeted at industrial, home automation, telemetry, automotive automation, agricultural automation, and healthcare, such as lighting automation, wireless data acquisition and monitoring of sensors, and oilfield, power, mining, and logistics management applications. In addition, it can locate moving targets in a localized area, such as vehicles in a city.
Usually, applications that meet one of the following conditions can be considered to use Zigbee technology for wireless transmission:
1. The need for data collection or monitoring of a large number of outlets;
2. Requirements for transmission of data is not a large amount of low-cost equipment;
3. Requirements for data transmission can be high sex, high security;
4. Equipment The device is very small in size, it is not convenient to place a large rechargeable battery or power module;
5. Battery-powered;
6. Complex terrain, many monitoring points, the need for larger network coverage;
7. Existing mobile network coverage of the blind area;
8. Telemetry telemetry system using the existing mobile network to carry out low data volume transmission.
9. Localized area mobile target positioning applications where GPS is ineffective or too costly.
Characteristics of Zigbee technology:
Power saving: two batteries support up to six months to two years of use
Reliable: collision avoidance mechanism, while the need for a fixed bandwidth for the communication services reserved for a dedicated time slot, to avoid sending data competition and conflict; node modules with automatic dynamic networking between the function, information ...... >>
Question 6: Does anyone know what control device API access error means? ！stm8+esp8266的设备 API(Application Programming Interface,Application Programming Interface) is a set of pre-defined Windows functions used to control the appearance and behavior of various parts of Windows (from the appearance of the desktop to the memory allocated for a new process). Each user action triggers one or more functions to tell Windows what is happening.
This is in some ways like the natural code of Windows. Other languages simply provide a way to access the API automatically and more easily. VB does a lot of work in this area. It completely hides the API and provides a completely different approach to programming in a Windows environment.
This means that every line of code you write in VB will be converted by VB into an API function that is passed to Windows. For example, Form1.Print. . VB will call the API function TextOut with certain parameters (provided in your code, or default parameters).
Similarly, when you click a button on a form, Windows sends a message to the form (which is hidden from you) and VB gets this call and analyzes it to generate a specific event (Button_Click).
The API functions are included in the Windows system directory in the dynamic link library files (e.g. User32.dll, GDI32.dll, Shell32.dll ...). .
API Declaration
As stated in What is an API, API functions are contained in DLL files located in the system directory. You can enter API function declarations yourself, but VB provides a simpler way to do this using the API Text Viewer.
To declare an API function in your project, simply run the API Text Viewer, open Win32api.txt (or .MDB if you've already converted it to a database) and you're ready to go. This will speed things up. Note: Microsoft's file has a lot of shortcomings, you can try the site to provide the download of api32.txt), select the declaration, find the desired function, click Add and copy (Copy), and then paste (Paste) into your project. The same goes for using predefined constants and types.
Question 7: Is this a supervisor?
Question 7: Is this a supervisor?
It looks like a computer speaker amplifier circuit.
Problem eight: the fire alarm linkage controller on the controlled device can not be remote start reasons Remote start is completed by the module, the first check after the start of the module action, if the module action, is the problem of the controlled equipment distribution box, if the module does not act, and then check the line is not through, if the line is through, that is, the coding is wrong, if the code is also correct, that is, the module is bad, if the module is not bad, that is, the host is not bad. If the module is not bad, then it is a problem with the host registration and settings.
Question nine: what is called control signal control system on the controlled equipment issued by the operation, measurement, detection, action and control signals, are called control signals
Question ten: what are the commonly used low-voltage control equipment GB 7251 points out that the low-voltage complete sets of switchgear and control equipment refers to: by one or more low-voltage switchgear and its associated control, measurement, signaling, protection, regulation and other equipment, the manufacturing of the switchgear and control equipment, the control, measurement, signaling and control equipment, the control, measurement, signaling, protection, regulation and other equipment, Protection, regulation and other equipment, a manufacturer is responsible for completing all the internal electrical and mechanical connections, with structural components completely assembled together in a combination. Above is the definition of low-voltage switchgear and control equipment.
What is a low-voltage complete set?
A: It is a complete set of low-voltage switchgear and control equipment
What are the two types of low-voltage complete sets?
A: electronic control equipment; power distribution equipment (or power distribution) two types.
Electronic control equipment? What is its use?
A: refers to a variety of production machinery, power transmission control equipment, its direct control of the object more than the motor. Mainly used in metallurgy, mining, locomotives, ships, various production machinery and lifting and transportation machinery.
What is the power distribution equipment?
A: refers to a variety of power plants, substations and factories and mining enterprises in the low-voltage distribution system for power, distribution and lighting equipment.
In the complete set of equipment, what is the meaning of the main circuit and auxiliary circuit?
A: The main circuit is to transmit electrical energy to all conductive circuits; auxiliary circuits outside the main circuit of all control, measurement, signaling and regulating circuits within the conductive circuits