Din Rail Switched Mode PS air conditioners work in turn and set the temperature?

With the continuous development of network information technology, the environmental parameters in the computer room where the server is stored are also becoming more and more important. Some small and medium-sized computer rooms keep the temperature inside the equipment room within a certain range. Not only one air conditioner is installed, but also a spare air conditioner is stored. The purpose is to prevent malfunction of the air conditioner in operation or other reasons. It is necessary to turn on the backup air conditioner. However, it is impossible for the computer room management personnel to stay in the computer room for 24 hours. In order to reduce the burden on the computer room management personnel, the air conditioner intelligent switcher can solve this problem well.
The air conditioner switch can control two air conditioners at the same time to realize functions such as air conditioner caller self-start, timed temperature control switch, failover, and fault alarm. Applicable to computer room, outdoor base station, archives, warehouse and other places. Its principle of using infrared code to switch air conditioners makes the device compatible with all brands of air conditioners on the market.
First, the air conditioner switch concept
The air conditioner dual-machine switcher is a kind of intelligent air-conditioner controller, which can detect and control the running state of the air-conditioner, and control according to the preset air-conditioner operation, shutdown and combined behavior, with automatic call start function, cycle switching, temperature control, Timing control, relay output and other functions. The purpose of protecting equipment, saving energy and reducing consumption, improving the efficiency of computer room management and extending the service life of air conditioners has been achieved. This product is widely used in civil, small and medium-sized computer rooms, communication stations, UPS machine rooms in all types of cabinets. Mainly used for switching control of two air conditioners.
Second, the advantages and Din Rail Switched Mode PS
Industrial design
It adopts industrial grade design and built-in watchdog circuit to ensure the normal operation of the equipment.
32-bit ARM processor
With a 32-bit ARM processor, it features fast processing and stable performance.
User-friendly interface
The display part adopts a TFT color liquid crystal screen, and has a user-friendly operation interface, and the operation is simple.
Brand optional, temperature optional
Built-in thousands of infrared codes, supporting up to 30 air-conditioning brands, including Midea, Gree, Oaks, Island, Skyworth, Chunlan, Daikin, Galanz, Haier, Hisense, Hualing, Kelon, Likal, Hitachi, Mitsubishi, Mitsubishi Electric, Mitsubishi Heavy Industries, Samsung, Panasonic, Sharp, Duckling, Electrolux, Sakura, Chigo, Changhong, Wellcome, TCL, LG, etc., support more than 95% of air conditioners on the market, and can set the boot temperature.
Universal infrared code learning function
Some uncommon air-conditioning brands that do not support built-in infrared codes can use the infrared code learning function to control air conditioners.
Call self-start
When the air conditioner encounters a power outage and then calls, the air conditioner shutdown cannot be automatically started, and manual startup is required, which brings great trouble to the management. When the power is detected and the call is detected, the infrared signal can be automatically sent to turn on the air conditioner without human control. The call start time can be customized.
Cycle switching
Single or two air conditioning cycle switching can be set, and the cycle switching time can be customized to support 1 minute to 99 hours. Cycle switching is often used to alternate between two air conditioners to improve air conditioning life.
Real-time temperature monitoring and control
It can monitor the ambient temperature in real time, and can be customized. When the ambient temperature exceeds or falls below the custom threshold temperature, the air conditioner turns on or off, and the cycle switching function is turned off until the temperature returns to normal.
Timing control
With RTC real-time clock, up to 5 timed tasks can be set to automatically control the air conditioner at a certain time. The timing mode can be set to single, daily or weekly.
One relay output
It can be customized to turn on or off the relay when the temperature is too high, too low or normal. The Din Rail Switching Mode output is recommended to connect the sound and light alarm to achieve high and low temperature warning function.
Third, technical parameters
 2-way infrared interface
Connection method: Plug and play
Control distance: <5 meters
1 relay output
Contact capacity: (AC) 250 V @ 3 A
Contact capacity: (DC) 30 V @ 3 A
On time (typical): 3 ms
Disconnect time (typical): 1 ms
Insulation resistance: minimum 1000 MΩ (500VDC)
Appearance parameters: 140*100*32mm
Power requirements: DC: +9V ~ +12VDC
Power consumption: 1.9W @12VDC
Mechanical characteristics: ABS plastic housing, standard DIN rail mounting
Environmental characteristics
Working temperature: -10 ~ 60 °C
Storage temperature: -20 ~ 85 °C
Humidity: 5 ~ 95%, no condensation
Fourth, the application area
Industrial site control
Computer room monitoring
Intelligent building
Power communication
Warehousing and monitoring
Electronic product manufacturing
Food machine beverage industry
Five, wiring method
Content source：http://www.wattconenergy.com/

Last year, VR market is still dominated by hardware, and future AR will surpass VR

The data analysis company Super Data recently released the 2017 VR market report. This report shows that last year the global VR market was still dominated by hardware, with hardware sales accounting for 75%. Spuer Data expects XR market hardware and software revenues to reach $760 million in 2018, driven by AR/MR development and successful games. The development of smart phones will allow AR/MR to lead 360 VR by 2021.

data

In terms of software, games account for 55% of VR consumer software revenue. HTC Vive and PSVR have higher player viscosities, and mobile VR is even more dominant in number, but profits account for only 15% of VR game revenue. Bethesda's two games, "Radiation 4" and "The Elder Scrolls 5: Skyrim" won the 2017 PC VR and PSVR earnings list championships respectively. Nearly half of VR users are enterprise users, including some schools and hospitals, but their spending power is not very good.

The report also believes that mobile AR will become the main driver of revenue by 2021, about twice the revenue of VR/MR head-display software. In the short term, high-end VR headsets will still affect their popularity among consumers due to the relatively high selling prices.

Wattco Energy Limited

Wattco

A high advanced technological power supplies company. 

Surpassing Din Rail Power Supply group with experienced engineers in sophisticate design solutions with outstanding topologies, construction, cost consideration for the industrial. Latest and continually up grade in design concepts towards up to date technologies. 

Over thirty years in the field, the teams are from multi – international top ranking organization. 

We serve in the areas of telecommunications, automation, building, construction, recycle energy and industrial equipment etc.,

Product reliability and high quality is our task, energy saving and environment protection is our policy.

Jin Shengyang Introduces 120W Ultrathin High Efficiency AC-DC Rail Power Supply

35mm Din Rail Switching Mode

Full load efficiency up to 92%, power factor up to 0.98

Full range 85 to 264 VAC (120 to 370 VDC) input

Meet UL60950, EN60950 certification 180W peak output for 3 seconds

Operating temperature: -25~70°C Input undervoltage protection, output short circuit, overcurrent, overvoltage, overload protection, remote control function


Product introduction

Following the introduction of LI24 (24W) and LI72 (72W) DIN rail-encapsulated products, Jin Shengyang has extended its power to introduce a new ultra-thin AC-DC rail power supply LI120. The DIN rail mounting width of 35mm saves valuable Installation space. LI120 accepts 85~264VAC full range voltage input, can withstand 180W peak output for 3 seconds, effectively protect backend load and line.

The LI120 adopts the latest high-efficiency circuit scheme designed by Jin Shengyang. It has a built-in power factor corrector (PFC) with a maximum efficiency of 92% and a standby power consumption as low as 0.75W. It complies with the global theme of “green, energy saving, and environmental protection”. This rail power supply uses multiple protection designs to handle output overvoltage, overload, and continuous short circuits. In terms of regulatory certification, UL60950 and EN60950 are available, which can be widely applied to distributed power systems in industrial control, power, marine, and rail traffic lights as bus power supplies for power supply and control cabinets.

比特幣的算力都用來幹什麼了 真相可能有點殘酷

第1頁：首先要搞清楚為什麼要有比特幣
　　幾乎每一個接觸比特幣的朋友，都會有這樣一個疑問：挖比特幣用的算力到底都用來幹什麼了？即使是專業的“礦工”，也很難回答這個問題。甚至有人說挖比特幣的算力用到了科研上了，比如尋找下一個“地球”、解密DNA等。對於不懂比特幣的人而言，這樣的解釋似乎也有些道理。但事實並不是這樣。

　　要想解決這個問題，需要對比特幣有一定了解。筆者推薦大家看中本聰的論文《比特幣：一種點對點的電子現金系統》，這是比特幣的源頭。論文涉及到為什麼需要比特幣、比特幣如何產生等知識。也正是這篇論文，能夠解答“挖比特幣用的算力到底都用來幹什麼”這個問題。

　　要想回答這個問題，我們需要從為什麼要有比特幣開始說。為了避免讀者覺得麻煩，筆者將答案公佈於此：其實這個問題的答案並不是眾人想像的“服務社會、服務科學”，而是服務比特幣網絡，保證比特幣網絡的安全。

　　比特幣的目的是要去掉交易中的中間環節，而這個中間環節就是金融機構。為了達到這個目的，比特幣需要建立一套證明體系。為什麼呢？舉個例子，A借錢給B，中間過程需要簽字條、公證等其他證明方式，證明A確實把錢借給了B。如果沒有證明，B可以矢口否認，A只能認栽。在傳統的交易過程中，金融機構起到了證明的作用。為什麼是金融機構，因為他有公信力，以信用作背書。

比特幣網絡算力變化趨勢

　　那麼比特幣怎麼證明A把錢借給了B呢？比特幣的思路是，把這個消息記在賬本上，然後全人類都能看到這個賬本，這樣所有的人都知道A把錢借給了B，借了多少，什麼時候借的，這樣B就無法矢口否認這個事實了。

　　把一個交易信息讓所有人都知道，這就是比特幣的證明體系。但又出現了一個問題，這個問題就是“雙重支付”。

第2頁：算力是為了維護比特幣網絡的安全

　　在解釋之前需要說明一下，在比特幣網絡裡，你有多少錢，不是你說了算，而是大家說了算，每個人都是公證人。

　　雙重支付就是一筆錢花了兩次，這種情況在紙幣上是不可能發生的，但由於比特幣並不是實物，只是“記賬本”，中間沒有實質物質進行交換，所以可以發生。繼續舉例子：A用1000買了B的一個東西，B記在一個賬本上；同時A用相同的1000買了C的東西，C記在一個賬本上。這時候B睡覺了，而C把剛才記的帳拿給大家看，B睡醒了才拿給大家看。

　　在B和C發貨之前，這1000是屬於B的還是屬於C的？為了解決這個問題，比特幣網絡讓交易不可逆，也就是不能退款。不可逆的特點讓A的這兩個1000交易只被承認一個。

　　首先，比特幣將所有的交易通過隨機散列加上時間戳，讓交易有先後順序，然後交易融入到基於隨機散列的工作量證明所形成的鏈條中，這樣形成的交易就無法更改。翻譯成人話就是：B和C的賬本拿給大家看之後，還會有人繼續在這個賬本上記賬。假如後面記賬的大部分人都選擇在B的賬本上記賬，那麼大家就會把B的賬本視為正確的，而B的賬本上記著A用1000買了B的東西，這樣A的1000就屬於B，C記的就不被承認了，B發貨給A就可以了。


基於隨機散列的工作量證明的鏈條

　　在這個過程中就需要算力，算力是為了保證區塊的信息不可更改。怎麼實現的呢？工作量證明基於隨機散列，然後形成鏈條。這個鏈條有個特點，你想開頭的話，就需要求解，求解就需要算力。而且這個求解的難度是呈現指數級增長的。只要你先求出這個解，你就獲得比特幣獎勵。

　　但如果你想修改已經出現的區塊，那就必須選擇鏈條最長的那個，然後從頭開始求解。這樣你修改的鏈條才會被認為是正確的（最長的鏈條視為正確的鏈條，不理解的話可以聯繫前面提到的B的賬本）。但這個最長的鏈條上有著全網下最大的工作量，全部求解的話需要耗費巨大的算力。

　　而這樣做是得不償失的，因為你耗費這麼多算力去修改得到的結果，不如你拿這些算力去求解的收益高。這樣就保證了不會有人去更改之前區塊的信息，區塊的信息自然就實現不可更改了。這個“不可更改”是可以更改的，只是沒有人傻到會這麼做而已。

　　也就是說，挖比特幣的算力實質上是一直在求解，這樣就能保證最長的鏈條擁有全網最大的工作量，從而不會被更改。這樣也就實現了比特幣系統是堅固的，是不會被人攻擊的。


第3頁：這種做法是否有意義

　　那麼這樣做有意義嗎？

　　我們先看這些算力。目前比特幣的全網算力是非常高的，據說已經比全球前100名超算的算力總和都要強。這個觀點有一定的誤導性，比特幣全網的算力只要是求一個算法，即SHA256算法的HASH值，這是比特幣網絡的工作量證明機制的要求。也就是說，比特幣全網在求解SHA256算法的HASH值的算力上是非常強大。

　　那讓比特幣網絡的算力去求解其他的算法呢？整個比特幣網絡的算力可能還沒有你手上電腦的運算效率高。這是因為，比特幣網絡的算力太過於專業了，只是求解SHA256算法的HASH值，它做不了其他工作。這也是為什麼，即使你用GTX1080Ti去挖礦，也不如游戲性能更差的挖礦機的快。

比特幣是不是貨幣這個問題的答案很重要

　　而且你就算用比特幣網絡的算力去挖基於其他算法的幣，效率也非常低下。

　　也就是說，比特幣網絡的算力是否有價值，最終還要看大家承不承認比特幣是不是貨幣。如果大家承認比特幣，那麼比特幣網絡將是全世界最安全的金融系統。從這個角度來看，比特幣網絡的算力實在是太有價值了！

　　如果比特幣沒有被公認為貨幣的話，那麼比特幣網絡算力的價值非常小，小到微乎其微，比特幣的價格完全是被炒上去的，充滿了泡沫。

　　以上兩個結論都是在比特幣被定性之後所得出來的，當下比特幣到底是不是貨幣還無法定性。但目前比特幣並沒有成為公認的貨幣，所以現在看來，比特幣網絡算力的最大價值就是，能挖出比特幣賣錢，這樣的比特幣更像是商品。

　　最後回答一下剛開始的問題，比特幣的算力都用來幹什麼了？往大的說是維護比特幣網絡的安全，往小的說就是在算數；耗費這麼多人力物力實現的算力有意義嗎？不好說；那為什麼還有那麼多人在挖礦？因為能賺錢啊！