Lub ntsiab txhais hauv ib kab lus
Active Signal: Powered los ntawm nws tus kheej. Cov kab teeb liab nqa nws tus kheej voltage / tam sim no, yuav tsum tsis muaj hluav taws xob sab nraud los xa cov ntaub ntawv.
Passive Signal: Tsis muaj zog. Nws tsuas yog sawv cev rau lub xeev hloov lossis hloov tsis kam, thiabxav tau lub zog sab nraudua haujlwm.
Dab tsi yog Active Signal?
Txhais
Ib qho khoom siv nrog ibinternal zogoutputs voltage los yog tam sim no signals uas yog inherently energized. Cov teeb liab no tuaj yeem xa ncaj qha los ntawm cov teeb liab xov hlau yam tsis muaj lub zog sab nraud ntxiv.
Hom Hom
Analog Active Signals4-20mA (active), 0-10V, 0-5V
Digital Active Signals: Active high / low level outputs, NPN / PNP transistor outputs
Cov yam ntxwv tseem ceeb
Tsim nws tus kheej voltage lossis tam sim no.
Xa cov teeb liab ntawm ob lub xov hlau yam tsis xav tau lub zog sab nraud.
Siv nyob rau hauv cov twj paj nruag / transmitters uas tus kheej - lub hwj chim thiab xa cov teeb liab tawm.
Yooj yim rau kev cuam tshuam; xav txog kev sib cais kom ntev - kis tau tus mob.
Tswv yim piv txwv
Ib qho kev sib cais transmitter lossis kub tswj uas tso tawm a4-20mA teeb liab powered los ntawm nws tus kheej movsiv ibnquag teeb liab.
Passive Signal yog dab tsi?
Txhais
Ib qho khoom siv nrogtsis muaj lub zog sab hauvtsuas yog muab kev sib cuag, qhib / tawm lub xeev, lossis kev hloov pauv hloov. Nws nqa tsis muaj hwj chim nws tus kheej thiabyuav tsum muaj kev siv hluav taws xob sab nraudlos tsim ib lub voj voog ua haujlwm.
Hom Hom
Passive Digital Signals: Relay qhuav hu, pushbuttons, txwv keyboards, ntab keyboards
Passive Analog SignalsPT100 RTDs, thermocouples, potentiometers
Cov yam ntxwv tseem ceeb
Tsis muaj voltage lossis tam sim no; tsuas yog ua haujlwm raws li kev hloov pauv ntawm / tawm.
Yuav tsum tau txuas nrog lub zog sab nraud(piv txwv li, los ntawm PLC lossis ntsuas) kom ua tiav lub voj voog.
Cov kev sib cuag qhuav yog feem ntau polarity- ywj siab.
Kev tiv thaiv ntau dua rau kev cuam tshuam ntau dua li cov cim qhia digital, ua rau lawv haum rau kev siv ntev - deb.
Tswv yim piv txwv
Ib tug relay tso zis tsuas yog ibhloov uas qhib los yog kaw. Nws tsis muaj zog; Thaum PLC muab qhov hluav taws xob rau lub voj voog, qhov hloov kaw tsim lub teeb liab - qhov no yogpassive qhuav tiv tauj.
Kev sib piv ncaj qha: Active vs. Passive Signals
表格
| Yam khoom | Active Signal | Passive Signal |
|---|---|---|
| Lub zog sab hauv | Yog, tus kheej -powered | Tsis yog, tsis muaj zog |
| Xav tau lub zog sab nraud | Tsis muaj | Yog (yuav tsum tau) |
| Qhov xwm txheej | Output voltage / tam sim no | Hloov lub xeev los yog tsis kam hloov |
| Cov Qauv | 4-20mA, 0-10V, theem tso zis | Relay qhuav hu, PT100, pushbuttons |
| Polarity | Polarized (yuav tsum txuas kom raug) | Feem ntau tsis yog -polarized |
| Tej kev siv | Cov cuab yeej kis tau tus mob, analog teeb liab hloov | Digital interlocks, ntsuas kub, tiv tauj tswj |
Common Industrial Applications
4-20mA tso zis los ntawm cov tswj qhov kub thiab txias los yog kev sib cais transmitters → Active Signal
Relay tswb tso zis los ntawm cov twj paj nruag → Passive Dry Contact
Kev ntsuas kub nrog PT100 RTDs → Passive Signal
NPN / PNP qhov sib thooj lossis photoelectric hloov → Active Digital Signal
Pushbuttons los yog pab tiv tauj rau ntawm Circuit Court breakers → Passive Signal
Feem ntau yuam kev kom zam
Kev kho mobpassive qhuav huraws li cov teeb liab nquag thiab txuas lawv yam tsis muaj lub hwj chim: Circuit Court yuav tsis ua haujlwm.
Ntxiv lub zog sab nraud rau ib qhoActive 4-20mA voj voog: Qhov no tuaj yeem ua rau lub ntsuas hluav taws xob ua haujlwm puas.
Misidentiifying active/passive signals, ua rau tsis raug PLC module xaiv lossis cov chaw nres nkoj puas.
Cov ntsiab lus ceev
Active=Powered los ntawm nws tus kheej, npaj xa cov cim
Passive=Tsuas yog hloov pauv/resistor, xav tau lub zog sab nraud los ua haujlwm