2094-EN02D-M01-S0
2094-EN02D-M01-S0
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輸出回路的設(shè)計(jì)
1、各種輸出方式之間的比較
(1)繼電器輸出:
優(yōu)點(diǎn)是不同公共點(diǎn)之間可帶不同的交、直流負(fù)載,且電壓也可不同,帶負(fù)載電流可達(dá)2A/點(diǎn);但繼電器輸出方式不適用于高頻動作的負(fù)載,這是由繼電器的壽命決 定的。其壽命隨帶負(fù)載電流的增加而減少,一般在幾十萬次至Jl百萬次之間,有的公司產(chǎn)品可達(dá)1000萬次以上,響應(yīng)時(shí)間為10ms。
(2)晶閘管輸出:
帶負(fù)載能力為0.2A/點(diǎn),只能帶交流負(fù)載,可適應(yīng)高頻動作,響應(yīng)時(shí)間為1ms。
(3)晶體管輸出:
zui大優(yōu)點(diǎn)是適應(yīng)于高頻動作,響應(yīng)時(shí)間短,一般為0.2ms左右,但它只能帶 DC 5—30V的負(fù)載,zui大輸出負(fù)載電流為0.5A/點(diǎn),但每4點(diǎn)不得大于0.8A。
當(dāng)你的系統(tǒng)輸出頻率為每分鐘6次以下時(shí),應(yīng)*繼電器輸出,因其電路設(shè)計(jì)簡單,抗干擾和帶負(fù)載能力強(qiáng)。當(dāng)頻率為10次/min以下時(shí),既可采用繼電器輸出方式;也可采用PLC輸出驅(qū)動達(dá)林頓三極管(5—10A),再驅(qū)動負(fù)載,可大大減小。
2、抗干擾與外部互鎖當(dāng) PLC輸出帶感性負(fù)載,負(fù)載斷電時(shí)會對PLC的輸出造成浪涌電流的沖擊,為此,對直流感性負(fù)載應(yīng)在其旁邊并接續(xù)流二極管,對交流感性負(fù)載應(yīng)并接浪涌吸收電 路,可有效保護(hù)PLC。當(dāng)兩個(gè)物理量的輸出在PLC內(nèi)部已進(jìn)行軟件互鎖后,在PLC的外部也應(yīng)進(jìn)行互鎖,以加強(qiáng)系統(tǒng)的可靠性。
3、“GOM“點(diǎn)的選擇不同的 PLC產(chǎn)品,其“COM”點(diǎn)的數(shù)量是不一樣的,有的一個(gè)“COM”點(diǎn)帶8個(gè)輸出點(diǎn),有的帶4個(gè)輸出點(diǎn),也有帶2個(gè)或1個(gè)輸出點(diǎn)的。當(dāng)負(fù)載的種類多,且電流 大時(shí),采用一個(gè)“COM”點(diǎn)帶1—2個(gè)輸出點(diǎn)的 PLC產(chǎn)品;當(dāng)負(fù)載數(shù)量多而種類少時(shí),采用一個(gè)“COM”點(diǎn)帶4—8個(gè)輸出點(diǎn)的PLC產(chǎn)品。這樣會對電路設(shè)計(jì)帶來很多方便,每個(gè)“COM”點(diǎn)處加一熔絲, 1—2個(gè)輸出時(shí)加2A的熔絲,4—8點(diǎn)輸出的加5—10A的熔絲,因 PLC內(nèi)部一般沒有熔絲。
4、PLC外部驅(qū)動電路對于 PLC輸出不能直接帶動負(fù)載的情況下,必須在外部采用驅(qū)動電路:可以用三極管驅(qū),也可以用固態(tài)繼電器或晶閘管電路驅(qū)動,同時(shí)應(yīng)采用保護(hù)電路和浪涌吸收電 路,且每路有顯示二極管(LED)指示。印制板應(yīng)做成插拔式,易于維修。
PLC的輸入輸出布線也有一定的要求,請看各公司的使用說明書。
YUKEN HYDRAULIC CYLINDER CJT70-FA32B80B-?ABD-EK
YUKEN HYDRAULIC CYLINDER CJT70-A80B30B ABD
YUKEN HYDRAULIC CYLINDER CJT70-FA80B90B-?BAD
YUKEN HYDRAULIC CYLINDER CJT70-A80B90B-B?AD
YUKEN HYDRAULIC CYLINDER CJT70-TC40B175B?-ADA-EK
YUKEN HYDRAULIC CYLINDER CJT70-FA40B115B?-CAA-EK
YUKEN HYDRAULIC CYLINDER CJT70-FA32B60B-?ABD
YUKEN HYDRAULIC CYLINDER CJT70-LA32B85B-?ABD
LENZ * UNION FITTING * UNKNOWN
MAC PNEUMATIC SOLENOID VALVE 6336D-000-PM-11?1DA
FESTO 40MM BORE 280MM STROKE PNEUMATIC CYLINDER DKE-40-280-PPV-?A
DIXON BOSS PNEUMATIC REGULATOR AIR COMPRESSOR R30-06R NNB
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PARKER SERIES VE HYDRAULIC CYLINDER 06.00 TBVELUS14A 12.750
YUKEN HYDRAULIC CYLINDER CJT70-CB40B175B?-ABB
YUKEN HYDRAULIC CYLINDER CJT70-FA32B274B?-ABD
YUKEN HYDRAULIC CYLINDER CJT70-FA80B30B-?ABD
TOYOOKI HYDRAULIC CYLINDER TFA-SA IFA40B70B30DBA
YUKEN HYDRAULIC CYLINDER CJT70-FA80C145B?-ABD
YUKEN HYDRAULIC CYLINDER CJT70-FA40B30B-?AB
YUKEN HYDRAULIC CYLINDER CJT70-FA32D25D-?ABD-EK
YUKEN HYDRAULIC CYLINDER CJT70-FA32B110B?-ACC-EK
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YUKEN HYDRAULIC CYLINDER CJT70-FA40B450B?-ABD-EK
PARKER HANNIFIN CB152HL001 CYLINDER BODY SEAL KIT NIB
FESTO 40MM BORE 150MM STROKE PNEUMATIC CYLINDER, ADVU-40-150-PA, NNB
YUKEN HYDRAULIC CYLINDER CJT70-FA32B210B?-BAD 20
YUKEN HYDRAULIC CYLINDER CJT70-BA40B145B?-ABD
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SMC HYDRAULIC CYLINDER T-CHDMC25-75-K5?9W
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YUKEN HYDRAULIC CYLINDER CJT70-FA80B40N-?AN
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TOYODA MACHINE HYDRAULIC CYLINDER HC-40CB215-W-L
YUKEN HYDRAULIC CYLINDER CJT70-LA32B90B-?ABA-E
YUKEN HYDRAULIC CYLINDER CJT70-LA 50B 65B-ABD
FESTO VMPA-CPI-EPL-GU INTERNAL PILOT AIR SILENCER W/ FIELD BUS INTERFACE
ROSS 2771B4005 110/120 VOLTS 50/60 HERTZ PNEUMATIC VALVE
FESTO PNEUMATIC CYLINDER DNGU-80-430-PPV?-A
FESTO 145PSI PNEUMATIC CYLINDER DNC-32-300-PPV-?A-KP NNB
YUKEN HYDRAULIC CYLINDER CJT70-FA40B80B-?CAA-EK 20A
YUKEN HYDRAULIC CYLINDER CJT70-TC40B370B?-ADD-EK 20A
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YUKEN HYDRAULIC CYLINDER CJT70-FA32B350B?-ABD-EK 20A
YUKEN HYDRAULIC CYLINDER CJT70-FA40B100N?-AND-EK
FESTO 40MM BORE 450MM STROKE PNEUMATIC CYLINDER, DNC-40-450-PPV-?A, NNB
YUKEN HYDRAULIC CYLINDER CJT70-FA32B375B?-BCD-EK 20A
YUKEN 20 HYDRAULIC CYLINDER PAZ-0228 / CJT70-FA32B700B?-ABD
MAC 0-150 PSI PRESSURE REGULATOR VALVE, PR63D-11BA *NIB*
FESTO PNEUMATIC CYLINDER DKE-63-340-PPV-?A
FESTO 32MM BORE 240MM STROKE PNEUMATIC CYLINDER, DNU-32-240-PPV-?A, NNB
YUKEN HYDRAULIC CYLINDER CJT70-FA32B50B-?ABD-EK 20A
YUKEN HYDRAULIC CYLINDER CJT70-FA63B65B-?ABC 20A
YUKEN HYDRAULIC CYLINDER CJT70-FA32B220B?-DAA-EK 20A
PARKER SER.HD 3000PSI HYDRAULIC CYLINDER 01.50 CJHDLTV142AC 2.000
STANLEY AIR TOOLS PNEUMATIC NUTRUNNER NO LABEL
SMC PNEUMATIC CYLINDER 63MM BORE 125MM STROKE CDQ2463-125DCM-?A93L
YUKEN HYDRAULIC CYLINDER CJT70-FA50B80B-?CBA-EN
BARCO ROTARY UNION BC-54924-06-06 NIB
NUMATICS 120V, 50/60HZ, 0.36A SOLENOID VALVE WITH MANIFOLD 33DSA4410
FESTO CYLINDER ADVU-63-25-P-A
ARO FLUID POWER E712LS
SMC CYLINDER CLATN80-500-E
FESTO 174PSI, 25MM STROKE,ROUND CYLINDER DGS-25-25
PALL FILTER ELEMENT NNB HC8400FKN16H / TV20B 104870
FESTO PNEUMATIC CYLINDER DNG-40-100-PPV-?A NNB
FESTO PNEUMATIC CYLINDER DNG-50-40-PPV-A NNB
NUMATICS VOLTS/HZ: 120/50/60 AMPS .11 SOLENOID VALVE I23SS500K / 123SS500K
FESTO PNEUMATIC CYLINDER DNG-50-50-PPV-A
NUMATICS 0-15 PSI PRECISION REGULATOR R880-02BG
PARKER 150PSI PNEUMATIC LUBRICATOR 06L11BE
NUMATICS 150PSIG MAX SOLENOID VALVE WITH MANIFOLD 124BB515MP00061
NUMATICS 150 PSIG, 24V PNEUMATIC VALVE 13BB500MP00061
MOOG SERVO VALVE G761-3001 NIB