人妻综合网,成人影片麻豆国产影片免费观看,中文字幕一区二区人妻电影,欧美性喷潮

HG-KR23J

HG-KR23J

HG-KR23J

從PLC控制系統(tǒng)與電器控制系統(tǒng)比較可知，PLC的用戶程序（軟件）代替了繼電器控制電路（硬件）。因此，對(duì)于使用者來說，可以將PLC等效成是許許多多各種各樣的“軟繼電器”和“軟接線”的集合，而用戶程序就是用“軟接線”將“軟繼電器”及其“觸點(diǎn)”按一定要求連接起來的“控制電路”。

 為了更好的理解這種等效關(guān)系，下面通過一個(gè)例子來說明。如圖1所示為三相異步電動(dòng)機(jī)單向起動(dòng)運(yùn)行的電器控制系統(tǒng)。其中，由輸入設(shè)備SB1、SB2、FR的觸點(diǎn)構(gòu)成系統(tǒng)的輸入部分，由輸出設(shè)備KM構(gòu)成系統(tǒng)的輸出部分。

圖1 三相異步電動(dòng)機(jī)單向運(yùn)行電器控制系統(tǒng)

a）主電路         b）控制電路

  如果用PLC來控制這臺(tái)三相異步電動(dòng)機(jī)，組成一個(gè)PLC控制系統(tǒng)，根據(jù)上述分析可知，系統(tǒng)主電路不變，只要將輸入設(shè)備SB1、SB2、FR的觸點(diǎn)與PLC的輸入端連接，輸出設(shè)備KM線圈與PLC的輸出端連接，就構(gòu)成PLC控制系統(tǒng)的輸入、輸出硬件線路。而控制部分的功能則由PLC的用戶程序來實(shí)現(xiàn)，其等效電路如圖2所示。

圖2  PLC的等效電路

 圖中，輸入設(shè)備SB1、SB2、FR與PLC內(nèi)部的“軟繼電器”X0、X1、X2的“線圈”對(duì)應(yīng)，由輸入設(shè)備控制相對(duì)應(yīng)的“軟繼電器”的狀態(tài)，即通過這些“軟繼電器”將外部輸入設(shè)備狀態(tài)變成PLC內(nèi)部的狀態(tài)，這類“軟繼電器”稱為輸入繼電器；同理，輸出設(shè)備KM與PLC內(nèi)部的“軟繼電器”Y0對(duì)應(yīng)，由“軟繼電器”Y0狀態(tài)控制對(duì)應(yīng)的輸出設(shè)備KM的狀態(tài)，即通過這些“軟繼電器”將PLC內(nèi)部狀態(tài)輸出，以控制外部輸出設(shè)備，這類“軟繼電器”稱為輸出繼電器。

因此，PLC用戶程序要實(shí)現(xiàn)的是：如何用輸入繼電器X0、X1、X2來控制輸出繼電器Y0。當(dāng)控制要求復(fù)雜時(shí)，程序中還要采用PLC內(nèi)部的其它類型的“軟繼電器”，如輔助繼電器、定時(shí)器、計(jì)數(shù)器等，以達(dá)到控制要求。

要注意的是，PLC等效電路中的繼電器并不是實(shí)際的物理繼電器，它實(shí)質(zhì)上是存儲(chǔ)器單元的狀態(tài)。單元狀態(tài)為“１”，相當(dāng)于繼電器接通；單元狀態(tài)為“０”，則相當(dāng)于繼電器斷開。因此，我們稱這些繼電器為“軟繼電器”。

福州卓凱電子科技有限公司
24小時(shí)銷售技術(shù)服務(wù)熱線 ：17705012279;0591-62182535
傳真（Fax）：0591-22989937
商務(wù)QQ ：879520885

聯(lián)系人： 林工（ 銷售工程師 ）
地址：福州市閩侯西江濱大道77號(hào)正榮潤園一號(hào)樓1205室

產(chǎn)品價(jià)格以電話或者QQ詢價(jià)為準(zhǔn)，發(fā)布價(jià)格不做參考

歡迎來電咨詢，我們將會(huì)給您優(yōu)質(zhì)的服務(wù)！

產(chǎn)品詳細(xì)信息，歡迎來電查詢！

只要是您想要的，我都能幫您找到，價(jià)格從優(yōu)！

您急需的產(chǎn)品，請(qǐng)聯(lián)系我們！

您詢不到的產(chǎn)品，請(qǐng)聯(lián)系我們！

您買不到的產(chǎn)品，請(qǐng)聯(lián)系我們！

Emerson LF320FX4 ME1 BA31M0G0201 2 V.6 Digital Main Board Unit

Emerson LF391EM4 / LF391EM4F Digital Main Input Board A3ATEMMA-007 A3ATJUH

Emerson LF391EM4 A eeprom sop8 for main board A4AT0UT

Emerson LF391EM4 A ME1 Main Digital Board (BA4AT0G0201 1) A4AT0MMA-001

Emerson LF391EM4 Digital Main Board (A3ATCUH) A3ATCMMA-002

Emerson LF391EM4 Main Board A3ATHMMA-002

Emerson LF391EM4 Main Board To Screen Panel LVDS Ribbon Cable

Emerson LF391EM4 UDULEDOGS017 Rev.C G017 GCS9 0175 LED Light Board

Emerson LF391EM4A Main Control Board BA4AT0G0201_1 A4AT0MMA-001 ME1

Emerson LF391EM4F , LF391EM4 Power Supply Board A3ATK022 , BA3ATHF0102 2

Emerson LF391EM4F IR Sensor Board LVDS Ribbon Cable

Emerson LF391EM4F Key Button / IR Sensor Board BA31T0G0203 1

Emerson LF391EM4F Main Board BA31T0G0 201 3 , A3ATJUH , A3ATJ-MMA

Emerson LF391EM4F Main Board BA3ATHG0201 3 , U9001UT, A3ATK013

Emerson LF391EM4F Main Board To LED Screen Cable

Emerson LF391EM4F Main Board To Screen Panel LVDS Ribbon Cable

Emerson LF391EM4F Power Supply Board To Main Board Cable

Emerson LF391EM4F Power Supply Board To Main Board LVDS Ribbon Cable

Emerson LF401EM5 Main Board 50GE01M3393LNA66-G1

Emerson LF401EM5 Main Board A4G25MMA-003

Emerson LF402EM6F Main Board (A4G2K-MMA-001)

Emerson LF402EM6F Main Control Board A4G2GMMA-001 A4G2G-MMA BA4GU5G0201

EMERSON LF461EM4 BUTTON BOARD A3AQDMSW BA3AU0G0203 2_2

EMERSON LF461EM4 BUTTON BOARD BA3AQAG0203 1_2

Emerson LF461EM4 Cable Ribbon (Main Board to IR Sensor Board)

Emerson LF461EM4 Cable Ribbons (Control Board to Panel)

Emerson LF461EM4 Cable Wire (Keyboard Control to IR Sensor Board)

EMERSON LF461EM4 IR SENSOR BOARD BA3AU0G0203 2_1

Emerson LF461EM4 LVDS Cable (Main Board to Control Board)

EMERSON LF461EM4 T-CON BOARD 13YR_S60TMB3C2LV0.1

EMERSON LF461EM4 T-CON BOARD LJ94-27754E (560TMB3CLV0.1)

EMERSON LF461EM4,& Others,T CON Board,#13YR_S60TMB3C2LV0.1,1EM228205,A3AQAUH.

Emerson LF501EM4 Cable Ribbon (Main Board to IR Sensor Board)

Emerson LF501EM4 Cable Ribbon (Power Supply Board to Main Board)

Emerson LF501EM4 Cable Wire (Keyboard Control to IR Sensor Board)

Emerson Lf501Em4 Control Board

Emerson LF501EM4 eeprom sop8 for main board DS1 DS3 A3AUFMMA-002

Emerson LF501EM4 eeprom sop8 for main board DS4 A3AUMUH

EMERSON LF501EM4 IR SENSOR BOARD BA3AU0G0203 2_1

Emerson LF501EM4 Key Function Board BA3AU0G0203 1_2

Emerson LF501EM4 LVDS Cable (Main Board to Control Board)

EMERSON LF501EM4 MAIN BOARD BA31TBG0401 1

Emerson LF501EM4 Main Board To IR Sensor Board Ribbon Cable

Emerson LF501EM4 Main Board To Screen Panel LVDS Cable

Emerson LF501EM4 Power Supply Board To Main Board LVDS Cable

Emerson LF501EM4F Key Button Control Board A3AUKMSW -  - -- TV A3AQFMSW

EMERSON LF501EM4F,& Others,Buttons Board,Control Board,#A3AUGMSW,BA3AU0G02031_2.

EMERSON LF501EM4F,LF501EM4,Main Video Board,#BA31T0G02013,130728P01A,WeShipFAST!

Emerson LF501EM5F Input Control Button Board (A3AUQMSW, BA3AQAG0203 1_2)

EMERSON LF501EM5F IR BOARD Free Shipping!!!

EMERSON LF501EM5F POWER SUPPLY BOARD BA3AU0F0102 3, A3AUQMPW

Emerson LF501EM5F Power Supply Board BA3AU0F0102 A3AUQMPW A3AUQ-MPW

Emerson LF501EMSF key controller board & IR sensor board

EMERSON LHD32K20US ANALOG BOARD 1LG4B10Y1060A Z6SF

EMERSON LHD32K20US DIGITAL BOARD 1LG4B10Y0880A Z6SF

EMERSON LIEBERT 02-790802-00 GATE DRIVE STATIC SWITCH CIRCUIT BOARD REV C

Emerson Liebert 02-790802-00 Rev. C Gate Drive Static Sw. Board

Emerson Liebert 02-790843-00 Power Supply Assembly PCB Circuit Board

EMERSON LIEBERT 02-790867-00 PWA DCR RELAY CIRCUIT BOARD REV A

EMERSON LIEBERT 02-790868-00 PWA RLI CIRCUIT BOARD REV A

EMERSON LIEBERT 02-790872-00 IDENTITY CIRCUIT BOARD REV B P/L D

EMERSON LIEBERT 02-790875-10 CIRCUIT BOARD REV 1

EMERSON LIEBERT 02-790886-00 DC SENSOR CIRCUIT BOARD REV A

EMERSON Liebert 02-790889-01 Rev 1 V & I Conditioner Circuit Board, (B158)

EMERSON Liebert 02-790889-02 Rev 1 V & I Conditioner Circuit Board, (B158)

EMERSON Liebert 02-790889-03 Rev 4 V & I Conditioner Circuit Board, (B158)

EMERSON LIEBERT 02-790889-03 V & I CONDITIONER CIRCUIT BOARD REV 3

EMERSON LIEBERT 02-797490-00L MICRO MONITOR CIRCUIT BOARD! FACTORY SEALED (B148)

Emerson Liebert 02-797490-01 Rev 06 / 12-797490-00 Rev 1 PCB Circuit Board

EMERSON Liebert 03-790842-02 Rev 0 PWA Power Supply Circuit Board, (B158)

EMERSON Liebert 03-790842-02 Rev 2 12-810002-00 Circuit Board, (B158)

Emerson Liebert 415761G-2 Rev. 30 Advanced Microprocessor Control Board (1433A)

EMERSON LIEBERT 4C13451G CIRCUIT BOARD REV 2

EMERSON LIEBERT 4D13462P3 CIRCUIT BOARD

EMERSON LIEBERT 4D13462P3 CIRCUIT BOARD 4D13461G Free Shipping

EMERSON LIEBERT ALARM DRY CONTACT CIRCUIT BOARD 02-790867-10 REV 3

EMERSON LIEBERT CIRCUIT BOARD CARD 12-765036-20 REV K

EMERSON LIEBERT CONTROL BOARD PWA 02-790870-10 REV 8

EMERSON LIEBERT CONTROL CIRCUIT BOARD CARD MODULE PWA 02-790870-10 REV. 8 P/L 2

EMERSON LIEBERT DC SENSOR PCB CIRCUIT BOARD 02-790886-00 REV. A

EMERSON LIEBERT DISPLAY CIRCUIT BOARD CARD 02-790871-30 0279087130

EMERSON LIEBERT FUSE MONITOR CIRCUIT BOARD CARD 02-790875-15 REV 1

EMERSON LIEBERT IDENTITY CIRCUIT BOARD CARD 02-790872-00 REV. B P/L D

EMERSON LIEBERT IGBT GATE DRIVER CIRCUIT BOARD CARD 02-791970 02-791970 REV 10

EMERSON LIEBERT IGBT GATE DRIVER CIRCUIT BOARD CARD 02-810003-00 REV 7, (B158)

EMERSON LIEBERT INTERFACE CIRCUIT BOARD CARD 02-790831-10 REV. 3 P/L 4

EMERSON LIEBERT LOGIC CIRCUIT BOARD CARD 02-790811-10 REV. 3 P/L 1

Emerson Liebert NX UHW241K1 PCB Circuit Board