APLISENS PEM-1000 Electromagnetic Flowmeter Pulse Output Interfacing User Manual

Taw qhia
Phau ntawv no qhia kev cuam tshuam cov mem tes tso zis ntawm PEM-1000 flowmeter nrog rau sab nraud input circuits thiab teeb tsa cov zis. Cov zis kuj tuaj yeem ua haujlwm hauv hom zaus yam tsis muaj kev hloov kho kho vajtse.

Kev sib txuas hluav taws xob
Lub pulse tso zis terminals (5, 6) nyob rau hauv lub rear chamber ntawm lub flowmeter rooj plaub. Cov zis yog ib tug galvanically cais, passive optocoupler zoo li Circuit Court nrog overcurrent tiv thaiv thiab ib tug diode choj rau polarity kev twb kev txuas.

Interfacing Pulse Output
Muaj peb qhov xwm txheej yooj yim rau kev cuam tshuam cov khoom siv mem tes:

Discrete inputs nrog nruab nrab nrhiav tau qhov pib los yog nrhiav tam sim no
Passive discrete inputs nrog qhov ntsuas pom tsawg uas tau npaj rau NPN tsav
Tsawg voltage, active discrete inputs npaj rau qhib collector los yog reed hu xwb

Txuas Sab Nraud Inputs nrog Polarization Circuit Court
Rau inputs tsis muaj ib tug polarization Circuit Court, yuav tsum tau ib tug sab nraud fais fab mov. Xyuas kom meej tias muaj 24 V qhov muaj nyob rau qee qhov circuits.

Interfacing Passive Inputs nrog Kev Tshawb Fawb Tsawg
Passive inputs nrog qhov ntsuas qis qis yog tsim rau NPN cov zis tab sis xav tau ib qho yooj yim interfacing circuit ua hauj lwm hauv PNP hom.

FAQ

Q: Dab tsi yog qhov ua haujlwm siab tshaj plaws voltage rau passive inputs nrog ib tug tsawg nrhiav pom pib?
A: Qhov siab tshaj plaws ua haujlwm voltage yog hais txog 30 V, nrog rau qhov pib voltage 1v.

Taw qhia

Phau ntawv no npog cov xwm txheej ntawm kev cuam tshuam cov mem tes tso zis ntawm PEM-1000 flowmeter rau ntau hom sab nraud input circuits thiab kev teeb tsa ntawm cov zis. Thov nco ntsoov, cov zis kuj tseem siv tau rau hauv hom zaus, tsis muaj qhov sib txawv ntawm cov khoom siv. Rau qhov yooj yim ntawm daim ntawv no, cov zis yuav raug hu ua "pulse output", tsis hais txog kev teeb tsa.

Phau ntawv no xav tias tus neeg siv muaj kev txawj ntse hauv kev khiav hauj lwm cov flowmeter, xws li navigating cov ntawv qhia zaub mov thiab nkag mus rau tus lej muaj nuj nqis siv cov keyboard hauv zos.

Kev sib txuas hluav taws xob

Lub pulse output terminals (5, 6) yog siv tau nyob rau hauv lub rear chamber ntawm lub flowmeter rooj plaub raws li qhia nyob rau hauv daim duab hauv qab no:

Daim duab 1. Pulse output terminals

Cov qauv sab hauv ntawm cov zis yuav raug piav qhia, kom tsis txhob muaj teeb meem nrog kev cuam tshuam nrog cov khoom siv hluav taws xob sab nraud ntawm PLCs, cov khoom siv ntsuas ntsuas, ntsuas pulse, thiab lwm yam.
Lub pulse tso zis yog ib tug galvanically cais, passive optocoupler zoo li Circuit Court, nruab nrog ntxiv kev tiv thaiv tshaj tam sim no thiab ib tug diode choj, tso cai rau tej polarity kev twb kev txuas. Lub simplified schematics ntawm no tso zis yog raws li nram no:

Daim duab 2. Simplified schematics ntawm pulse tso zis

Tus tiv thaiv Circuit Court yog ib tug tsawg voltage poob passive tam sim no qhov chaw nrog qhov txwv tam sim no txog 20 mA. Txuas (mistakenly) low impedance voltage qhov chaw rau cov zis yog tsis destructible, ua tsaug rau no pro-tection. Lub guaranteed tso zis tam sim no ntawm cov zis yog 10 mA. Qhov tseem ceeb tshaj plaws ntawm lub Circuit Court saum toj no yog voltage poob ntawm li 1-1,5 V ntawm lub terminals 5-6. Qhov no voltage poob siab dua li ntawm lub xeev voltage poob ntawm tus qauv qhib-collector optocoupler lossis relay tso zis, uas cuam tshuam tsis zoo rau kev cuam tshuam rau sab nraud circuits uas yuav tsum tau qis vol.tage poob tso zis.

Muaj peb yam tseem ceeb ntawm kev cuam tshuam cov mem tes tso zis nrog rau sab nraud input circuit:

discrete inputs nrog nruab nrab nrhiav tau qhov pib los yog nrhiav tam sim no,
passive discrete inputs nrog qhov ntsuas qis qis (~ 0,7 V) npaj rau NPN tsav,
tsawg voltage, active discrete inputs npaj rau qhib collector los yog reed (relay) hu xwb.

Cov khoom siv nrog qhov nruab nrab qhov ntsuas qhov pib feem ntau yog cov khoom siv tam sim no nrog kev tshawb pom tam sim no lossis vol.tage hom inputs, optionally nrog active polarization network powered internally los ntawm voltages tsis tsawg dua 5 V. Hom examples ntawm cov inputs yog digital inputs circuits ntawm PLC controllers, xeem rigs 'input circuits, galvanically cais interfaces thiab hais txog. Hom pib voltages dag nyob rau hauv qhov ntau ntawm 5-20 V nrog hysteresis tseem ceeb. Qhov ntsuas tam sim no yog li 1-5 mA. Inputs nrog polarization circuits tuaj yeem cuam tshuam ncaj qha nrog cov khoom siv mem tes. Saib daim duab hauv qab no:

Daim duab 3. Txuas cov khoom siv sab nraud nrog lub voj voog polarization

Cov khoom siv uas tsis muaj polarization circuits yuav tsum tau cuam tshuam nrog kev pab los ntawm kev siv hluav taws xob sab nraud. Saib daim duab hauv qab no:

Daim duab 4. Kev sib txuas ntawm cov khoom siv sab nraud yam tsis muaj polarization Circuit Court

Thov nco ntsoov, tias qee qhov kev thov Circuit Court yuav xav tau lub zog hluav taws xob txog 24 V. Nws tuaj yeem yog ib qho khoom siv tau 24 V, piv txwv li hauv zos 24 V mains, fais fab mov ntawm qhov tsawg vol.tage version ntawm flowmeter, thiab lwm yam, vim galvanic rwb thaiv tsev ntawm lub flowmeter sab. Tsis tas li ntawd, cov khoom lag luam-qib PSU tuaj yeem siv tau, tawm tswv yim me me li sai tau, vim tias tam sim no kos los ntawm cov circuits no tsawg heev. Passive inputs nrog qhov ntsuas qis qis feem ntau yog npaj los tsav los ntawm NPN cov zis. Lawv qhov kev ua haujlwm siab tshaj plaws voltage yog hais txog 30 V, tab sis qhov pib voltage yog hais txog 1 V. Cov circuits tsis tuaj yeem cuam tshuam ncaj qha nrog cov zis tawm ntawm lub ntsuas dej, tab sis tuaj yeem siv hauv "PNP" hom. Ib qho yooj yim interfacing circuit daws qhov teeb meem no. Saib daim duab hauv qab no:

Daim duab 5. Txuas lub passive input nrog ib qho kev kuaj pom qis rau NPN tsav

Tus nqi ntawm Resistor tsis yog qhov tseem ceeb, nws yuav tsum nyob qhov twg hauv thaj tsam 2,2-22 kΩ. Qhov siab dua qhov kev tiv thaiv, qhov me me tam sim no kos duab los ntawm cov khoom siv hluav taws xob, tab sis kuj tseem txo qis lub suab nrov tiv thaiv ntawm Circuit Court. Qhov teeb meem tshaj plaws yog lub zog qis, qis-voltage active digital inputs npaj tsuas yog rau cov muaj peev xwm-dawb hu xws li relay, reed, los yog qhib collector sawv daws yuav. Hom examples ntawm cov inputs yog cov khoom siv hluav taws xob tsawg xws li LCD pulse counters, ntsuas kub, lossis lwm yam khoom siv raws li qhov tsawg-vol.tagib logic. Hauv qhov no, cov hauv qab no yuav tsum tau siv:

Daim duab 6. Kev sib txuas ntawm qhov qis-voltage active discrete inputs npaj rau muaj peev xwm-dawb hu

Lub Circuit Court siv ib lub xeev relay (SSR). Rau txoj hauj lwm no tsuas yog versions nrog qis hauv xeev voltage poob, qis tso zis tawm tam sim no, thiab qhov tsawg kawg nkaus ua haujlwm tam sim no yog qhov tsim nyog vim tias cov khoom siv hluav taws xob tsis tshua muaj voltage cov khoom siv feem ntau yog qhov chaw tam sim no nyob rau hauv thaj tsam ntawm 1-2 mA, thiab kuaj pom qhov pib voltage tsawg dua 1 V. ELCO SSR20-524C yog qhov zoo rau txoj haujlwm no. Parameters ntawm cov cuab yeej no muaj nyob rau hauv cov lus hauv qab no:

Table 1. Qhov tseem ceeb ntawm ELCO SSR20-524C

Resistor R yog xaiv tau nyob rau hauv Circuit Court no (siv tsuas yog rau high-rhiab heev SSRs). Txhua qhov sib npaug SSR ntawm cov tsis zoo sib xws tuaj yeem siv tau. Thov nco ntsoov, tias qhov SSR no muaj cov zis polarized thiab tsis yog polarized input. Saib cov polarities rau qhov sib npaug. Rau ib daim ntawv teev tag nrho ntawm lub voj voog no saib ➔ Cov Ntawv Ntxiv A. Cov npe ib feem ntawm cov khoom siv hluav taws xob sib txuas rau reed hu inputs. Rau qhov sib npaug SSR saib ➔ Daim Ntawv Ntxiv B. SSR sib npaug.

Qee qhov versions ntawm lub zog qis qis-voltage digital inputs tsis tuaj yeem tsav tau txawm tias los ntawm SSR relay vim tias tsis tshua muaj kev tsav tsheb tam sim no (hauv thaj tsam ntawm µAmperes) ua ke nrog qhov ntsuas qhov ntsuas qis thiab siab input impedance. Hom examples ntawm cov inputs yog cov roj teeb uas siv hluav taws xob tsawg, xws li LCD txee thiab lub zog ntsuas hluav taws xob (xws li Zenner multidata series). Hmoov zoo, cov khoom siv no feem ntau tuaj yeem tswj tau los ntawm kev ua haujlwm qis-voltage qhov chaw. Tsav cov khoom siv no yuav tsum tau hloov kho me ntsis ntawm PNP schematic:

Daim duab 7. Kev sib txuas cov inputs discrete nrog tsis tshua muaj tsav tam sim no (nyob rau hauv qhov ntau ntawm microamplwm yam)

Resistor R1 thiab R2 tsim ib lub voltage divider tiv thaiv input circuits tiv thaiv ntau dhau voltage los ntawm 24 V qhov chaw thaum cov khoom siv mem tes ua haujlwm. Rau siab tshaj input voltage ntawm low-voltage input ntawm 3,6 V, resistor qhov tseem ceeb yuav tsum yog: R1 = 12 kΩ, R2 = 1,5 kΩ rau 24 V fais fab mov, muab nws tsis pub tshaj 32 V. Fais fab mov units ntawm lwm yam vol.tages tuaj yeem siv tau, ces qhov tseem ceeb ntawm cov resistors yuav tsum raug xam raws li cov khoom siv hluav taws xob voltage thiab voltage txwv ntawm input circuit. Saib ➔ Cov Ntawv Ntxiv C. Cov kev ntsuas qis-volt-age active tsav tsheb rau kev suav rau lwm yam.

CONFIGURATION NTAWM LUB PULSE OUTPUT

Lub pulse tso zis ntawm lub flowmeter yuav tsum raug teeb tsa kom ua tiav qhov kev daws teeb meem zoo tshaj plaws thiab tsis txhob ua yuam kev los ntawm qhov siab dhau ntawm cov mem tes zaus. Qhov tseem ceeb tshaj plaws tsis yog mem tes ntev thiab ntim ib mem tes. Cov kev txwv no yog piav qhia tus kheej - rau txhua qhov ntim tag nrho ntawm "ntim ib pulse" ib pulse ntawm qhov ntev xaiv tau muab. Thov nco ntsoov, tias PEM-1000 flowmeter siv qhov "volume per pulse" mus kom ze, tab sis qee qhov flowmeters lossis pulse detection devices siv "pulses per volume" mus kom ze, cov kev ntsuas no yog sib cuam tshuam ntawm ib leeg. Tias yog vim li cas siv cov lej puag ncig raws li qhov ntim ntawm cov mem tes parameter (lossis kuaj nws qhov sib txawv) raug pom zoo.
Lub theoretical siab tshaj plaws instantaneous mem tes zaus rau pulse tso zis yog 500 Hz vim hais tias lub shortest pulis ntawm 1 ms thiab qhov shortest kis kuj yog 1 ms. Xws li cov frequencies siab yuav tsum tau zam vim muaj kev pheej hmoo ntawm mem tes poob nyob rau hauv cov ntaub ntawv ntawm ib ntus ntws tus nqi siab tshaj. Tsis tas li ntawd, SSR zaus txwv thiab cov kev txwv sab nraud Circuit Court zaus siv. Theoretical txwv rau ntim ib tus nqi mem tes thiab mem tes ntev tshwm sim los ntawm cov qauv hauv qab no:

qhov twg QMAX - qhov siab tshaj plaws ntws [m3 / h].

Kev teeb tsa cov txiaj ntsig zoo ntawm cov khoom siv hluav taws xob mem tes yuav tsum muaj qee qhov npoo. Tias yog vim li cas qhov zoo tshaj plaws tso zis zaus rau 100% ntawm qhov ntau yuav tsum tsis pub ntau tshaj li 200 Hz rau 1 ms pulses. Lub mem tes ntev yuav tsum tau teem kom txaus siab rau qhov kev tshawb pom muaj peev xwm ntawm sab nraud circuits. Cov txiaj ntsig siv tau haum nyob rau hauv thaj tsam ntawm 1 ms (sai inputs) - 100 ms (slow inputs). Tus nqi siv yuav tsum tsawg li tsawg tau vim tias nws txwv qhov ua tau zoo tshaj plaws. ntev dua pthe ulse ntev, qhov qis tshaj qhov theoretical zaus, rau 10 ms pulses nws poob rau ~ 90 Hz.

Qhov kev teeb tsa ntawm pulse tso zis yog raws li nram no:

Ntawv qhia zaub mov → Configuration → Outputs → Pulse output → On/Off = ON
Ntawv qhia zaub mov → Configuration → Outputs → Pulse output → Hom = PULSE
Ntawv qhia zaub mov → Configuration → Outputs → Pulse output → Pulse → Pulse time = 1 [ms] (saib cov ntawv sau saum toj no)
Ntawv qhia zaub mov → Configuration → Outputs → Pulse output → Pulse → Hom = POSITIVE
Ntawv qhia zaub mov → Configuration → Outputs → Pulse output → Pulse → Polar = POSITIVE
Ntawv qhia zaub mov → Configuration → Outputs → Pulse output → Pulse → Volume/imp. = saib cov lus piav qhia saum toj no.

Thov nco ntsoov, qhov chaw lim "rau cov zis tawm" ("Ntawv qhia zaub mov → Kev teeb tsa → Lim → rau Pulse tawm") hais txog hom zaus ntawm cov zis. Tsis muaj kev lim dej rau cov khoom siv mem tes hauv hom mem tes, vim tias nws tus kheej qhov nruab nrab thiab siab-precision ntawm hom kev ua haujlwm no.

KWV TIJ HMOOB

Daim ntawv teev cov zis interface Circuit Court rau reed hu inputs

SSR sib npaug

Thov nco ntsoov tias qhov sib npaug ntawm SSR siv nyob rau hauv lub interface Circuit Court yuav tsum tau xaiv nrog kev saib xyuas zoo, feem ntau ntawm SSRs tsis ua raws li qhov yuav tsum tau muaj ntawm lub zog qis, qis-vol.tage input circuits. SSRs raws li thyristor / triacs lossis bipolar transistors nrog kev tiv thaiv rov qab polarity yuav tsis tuaj yeem siv tau vim lawv qhov nce siab.tage poob los yog qhov tsawg kawg nkaus load tam sim no tus nqi. Cov nram qab no tau xaiv, raws li lawv cov catalog specifications, tab sis tsis tau sim hauv daim teb. Tag nrho cov ntawm lawv yog SPST-NO version, uas kuj yog qhov nrov tshaj plaws. Kev ntim khoom ntawm cov khoom no yuav tsis sib xws, thov siv cov khoom siv txuas rau TH35 rail mounting.

Tsawg voltage active driver suav

Ib co low-voltage digital inputs tuaj yeem tsav los ntawm kev ua haujlwm voltage qhov chaw, muab qhov siab tshaj plaws input voltage tsis tshaj. Schematic ntawm kev sib txuas yog raws li nram no:

Resistor R1 thiab R2 tsim ib lub voltage divider txwv qhov tso zis ntau tshaj voltage tus tsav tsheb. Kev suav ntawm qhov tseem ceeb ntawm qhov resistor rau qee qhov xwm txheej yog raws li hauv qab no (E series qhov tseem ceeb yog siv, pom zoo kam rau ua yog 1%):

Rau lwm qhov txiaj ntsig ntawm cov ntsuas no, ua raws li cov qauv hauv qab no:

Cov ntaub ntawv / Cov ntaub ntawv

APLISENS PEM-1000 Electromagnetic Flowmeter Pulse Output Interfacing [ua pdf] Tus neeg siv phau ntawv
PEM-1000 Electromagnetic Flowmeter Pulse Output Interfacing, PEM-1000, Electromagnetic Flowmeter Pulse Output Interfacing, Flowmeter Pulse Output Interfacing, Pulse Output Interfacing, Output Interfacing

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APLISENS PEM-1000 Electromagnetic Flowmeter Pulse Output Interfacing

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