福建中立恒自動(dòng)化設(shè)備有限公司

1．輸入/輸出單元

輸入/輸出單元通常也稱I/O單元或I/O模塊，是PLC與工業(yè)生產(chǎn)現(xiàn)場之間的連接部件。

PLC通過輸入接口可以檢測(cè)被控對(duì)象的各種數(shù)據(jù)，以這些數(shù)據(jù)作為PLC對(duì)被控制對(duì)象進(jìn)行控制的依據(jù)；同時(shí)PLC又通過輸出接口將處理結(jié)果送給被控制對(duì)象，以實(shí)現(xiàn)控制目的。

由于外部輸入設(shè)備和輸出設(shè)備所需的信號(hào)電平是多種多樣的，而PLC內(nèi)部CPU的處理的信息只能是標(biāo)準(zhǔn)電平，所以I/O接口要實(shí)現(xiàn)這種轉(zhuǎn)換。

I/O接口一般都具有光電隔離和濾波功能，以提高PLC的抗干擾能力。另外，I/O接口上通常還有狀態(tài)指示，工作狀況直觀，便于維護(hù)。

PLC提供了多種操作電平和驅(qū)動(dòng)能力的I/O接口，有各種各樣功能的I/O接口供用戶選用。I/O接口的主要類型有：數(shù)字量（開關(guān)量）輸入、數(shù)字量（開關(guān)量）輸出、模擬量輸入、模擬量輸出等。

常用的開關(guān)量輸入接口按其使用的電源不同有三種類型：直流輸入接口、交流輸入接口和交/直流輸入接口。

常用的開關(guān)量輸出接口按輸出開關(guān)器件不同有三種類型：是繼電器輸出、晶體管輸出和雙向晶閘管輸出。

繼電器輸出接口可驅(qū)動(dòng)交流或直流負(fù)載，但其響應(yīng)時(shí)間長，動(dòng)作頻率低；而晶體管輸出和雙向晶閘管輸出接口的響應(yīng)速度快，動(dòng)作頻率高，但前者只能用于驅(qū)動(dòng)直流負(fù)載，后者只能用于交流負(fù)載。

PLC的I/O接口所能接受的輸入信號(hào)個(gè)數(shù)和輸出信號(hào)個(gè)數(shù)稱為PLC輸入/輸出（I/O）點(diǎn)數(shù)。I/O點(diǎn)數(shù)是選擇PLC的重要依據(jù)之一。當(dāng)系統(tǒng)的I/O點(diǎn)數(shù)不夠時(shí)，可通過PLC的I/O擴(kuò)展接口對(duì)系統(tǒng)進(jìn)行擴(kuò)展。

2．通信接口

PLC配有各種通信接口，這些通信接口一般都帶有通信處理器。

PLC通過這些通信接口可與監(jiān)視器、打印機(jī)、其它PLC、計(jì)算機(jī)等設(shè)備實(shí)現(xiàn)通信。

PLC與打印機(jī)連接，可將過程信息、系統(tǒng)參數(shù)等輸出打??；與監(jiān)視器連接，可將控制過程圖像顯示出來；與其它PLC連接，可組成多機(jī)系統(tǒng)或連成網(wǎng)絡(luò)，實(shí)現(xiàn)更大規(guī)?？刂?。

與計(jì)算機(jī)連接，可組成多級(jí)分布式控制系統(tǒng)，實(shí)現(xiàn)控制與管理相結(jié)合。遠(yuǎn)程I/O系統(tǒng)也必須配備相應(yīng)的通信接口模塊。

3．智能接口模塊

智能接口模塊是一獨(dú)立的計(jì)算機(jī)系統(tǒng)，它有自己的CPU、系統(tǒng)程序、存儲(chǔ)器以及與PLC系統(tǒng)總線相連的接口。

它作為PLC系統(tǒng)的一個(gè)模塊，通過總線與PLC相連，進(jìn)行數(shù)據(jù)交換，并在PLC的協(xié)調(diào)管理下獨(dú)立地進(jìn)行工作。

PLC的智能接口模塊種類很多，如：高速計(jì)數(shù)模塊、閉環(huán)控制模塊、運(yùn)動(dòng)控制模塊、中斷控制模塊等。

以下鏈接皆有貨

Watlow AFCJ0FA20GK10 Type J Thermocouple 0.032" x 2" Sheath,10Ft Leads

Watlow AFCJ0TA010GK10 Type K Thermocouple 0.032" x 36mm Sheath,10Ft Leads

Watlow AFCJ0TA20GJ100 Type J Thermocouple 0.032" x 2" Probe,Grounded

Watlow AFDA0HA006GK060 Thermocouple 0.04 x 0.8" Sheath, Type:K,6Ft Leads

Watlow AFDC0FA010U3020 Thermocouple, Ungrounded, Special J,0.40" x 1" Probe

Watlow AFHD0HF020UJ100 Type J Thermocouple 0.188" Dia, MiniPlug, Stranded FEP

Watlow AFJM0TC020GJ120 Thermocouple, Type J, 1/4" X 2" Sheath,*Cut Coating*

Watlow BHN713E5S5A Screw Plug Immersion Heater 480VAC, 3Phase,2"NPT

Watlow C4A-9639 Cartridge Heater, 100W Power, 120V AC, 1/8" x3.75" Sheath

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Watlow DB20-24C0-0000 DIN-A-MITE Power Controller, 100-240VAC25A, 3-Phase

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Watlow DC10-12L0-0000 DIN-a-mite Solid State 55A PowerController 120VAC, 4-20mA

Watlow DC10-20L0-0000 DIN-a-mite Solid State Power Control,200-208VAC, 55A

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Watlow DC1L-5020-F000 DIN-a-mite Solid State Power Control,208VAC, 50A

Watlow DC20-24C0-0000 DIN-A-MITE Solid State Power Controller40A 100-240VAC 3PH

Watlow DC20-24F0-0000 DIN-A-MITE Power Controller 100-240VAC,40A

Watlow DC20-60F0-0000 Solid State Power Control, Voltage:277-600VAC 50/60Hz

Watlow DC21-60K2-0000 DIN-A-MITE Power Controller 277-600VAC,3-Phase, 65A

Watlow DC30-24C0-S000 Solid-State 30A Power Controller120-240VAC 3PH, 4.5-32VDC

Watlow DC30-60C0-0000 Solid State 30A Power Controller277-600VAC, 4.5-32VDC

Watlow DC30-60C0-0000 Solid State 30A Power Controller,277-600VAC, 4.5-32VDC

Watlow DC30-60C0-0000 Solid State 30A Power Controller,4.5-32VDC, 277-600VAC

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Watlow E1A52 Firerod Cartridge Heater 1/4" x 1", 120V 100W, 10FtBraided Lead

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Watlow FSA161WM Firebar Single Ended Heater, Heated Length: 12",120VAC 375W

Watlow Gordon AT1109401 Rigid Sheath Stainless SteelThermocouple Type K

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Watlow J17J-10105 Firerod Heater Cartridge, 120V 1380W, .5"Diameter, 17" Long

Watlow J7J26 Firerod Cartridge Heater ?1/2" x 7.5", 240V 1000W,3Ft Leads

Watlow L11R-527 Firerod Cartridge Heater, Length 12" (11.5"Heated), 120VAC 650W

Watlow L28N-7396 Firerod Heater Cartridge, 240V 1540W, 5/8"Diameter, 28" Long

Watlow L36A-1549 Firerod Heater Cartridge, 240VAC 1600W, 5/8"Diameter, 36" Long

Watlow Limit LV LVE6JW00000400A Temperature Limit Controller

Watlow LV LVE6HW00000999A Temperature Limit Controller,230/240VAC 10VA

Watlow LVC5HU00001000A Limit Temperature Controller Type J T/C,0 to 1000°F

Watlow LVC6JW00000150A Limit Temperature Controller Type J T/C,0-150°C, 120VAC

Watlow LVC6JW00000700A Temperature Limit Controller DIN Rail,120VAC, 8A

Watlow LVC6KW00000999A Temperature Limit Controller,Thermocouple Type K, 120VAC

Watlow LVC6KW00500900A Limit Temperature Controller Type K T/C,50-900°F, 120VAC

Watlow LVE2JW000001601 Limit Temperature Controller, Type J,0-160°C, 240VAC

Watlow LVE6HU00000999A Temperature Controller, T/C:J,230/240VAC, -346 to 1900°F

Watlow LVE6HW00000999A Temperature Limit Controller, T/C: J,0-999°F, 230/240VAC

Watlow LVE6HW01000250A Limit Temperature Controller, Type J,100-250°F, 240VAC

Watlow LVE6JW00000125A Temperature Limit Controller, T/C Type J(-210 to 1038°C)

  Watlow LVE6JW00000999A Temperature Limit Controller,230/240VAC 10VA

Watlow MINI-J5R1-0000 Mini Single Controller Console for J TypeThermocouple

Watlow PC81-F30A-1000 Heater Power Control Zones 1? 24-120VAC185A 120/240VAC

Watlow PC91-F20B-1000 3-Zone Single-Phase Power Control 90A,200~480V, 7mm Mount

Watlow PDD1-JAJA-0AAA Temperature Controller 24-28VAC/DC 2 T/CIn 2 Relay Out

Watlow PDD3-CACA-0AAA PID Controller, Supply: 24-28VAC/DC50/60Hz 14VA Max

Watlow PDS2-KCAA-0AAA Temperature Controller, Single ChannelControl

Watlow PM3C1CA-AAAAAAA EZ-ZONE PID Temperature Controller,100-240VAC, 1/32 DIN

Watlow PM3C1EJ-AAAABAA EZ-ZONE PID Temperature Controller,100-240VAC, Relay Out

Watlow PM3C2CA-1AAAAAA PID Controller, Universal Input, 100-240VAC Supply

Watlow PM3C2CA-AAAAAAA EZ-Zone PID Temp Controller, UniversalInput, 100-240VAC

Watlow PM3C2FJ-1AAAAAA PID Controller Universal Input 100-240VACSupply 5A Relay

Watlow PM3L1EJ-AAAAAAA Temperature Limit Controller, 100-240VAC,1/32DIN

Watlow PM6C1CH-AAAABAA EZ-Zone Temperature Controller,100-240VAC, 1/16 DIN

Watlow PM6C1CJ-BAAAHWP Universal PID Temperature Controller,1/16DIN, 100-240VAC

Watlow PM6C1EJ-ALEJAAA PID Controller, Input: Universal, Output:2 Relays

Watlow PM6C1FC-3AAAAAA Multi-Function Controller 7 Segment, 100to 240v AC

Watlow PM6C1FJ-ARCKAAA EZ-ZONE Panel Mount PID Controller100-240VAC

Watlow PM6C3CC-1LCJAAA PID Controller, Switched DC, RTD/TC,24VAC/DC, 1/16 DIN

Watlow PM6C3CC-3AAAAAA Temperature Limit Controller, 15-36VDC24VAC, 1/16DIN

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Watlow PM6C3CJ-3AAAAAA EZ-ZONE PID Controller, 15-36VDC24VAC

Watlow PM6C3CJ-AAAAAAA EZ-ZONE Temperature PID Controller,24VAC/DC *Locked*

Watlow PM6C3EJ-AAEJAAA EZ-Zone Universal PID Controller24VAC/20-28VDC 1/16 DIN

Watlow PM6C3EK-ALEJAAA EZ-ZONE PID Universal Temp Controller24V, Relay/SSR Out

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Watlow PM6L3EJ-1AAAAAA EZ-ZONE Universal Temp Limit Controller24V, Relay Out

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Watlow PM8C3CJ-3CCJDAA EZ-Zone PM PID Controller DC/Open 5ARelay 1/8 DIN 24VDC

Watlow PM8C3CJ-3LCJDAA EZ-Zone PM Limit PID Controller, DC/Open,5A Relay, 24V