National Instruments NI-9218 Channel Analogue Input Module
Imininingwane
- Igama lomkhiqizo: NI-9218
- Izinhlobo Zokuxhuma: I-LEMO ne-DSUB
- Izinhlobo Zokulinganisa: Usekelo olwakhelwe ngaphakathi lwezinhlobo ezahlukahlukene
- I-Sensor Excitation: I-excitation engu-12V ozikhethela yona
Izinhlobo zezixhumi
I-NI-9218 inezinhlobo zesixhumi ezingaphezu kwesisodwa: i-NI-9218 ene-LEMO ne-NI-9218 ene-DSUB. Ngaphandle uma kucacisiwe uhlobo lwesixhumi, i-NI-9218 ibhekisela kuzo zombili izinhlobo zesixhumi.
I-NI-9218
Signals by Measurement Type
| Imodi | Phina
1 |
|||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| ±16 V | EX+ | — | I-AI-, EX- | — | — | I-AI+ | — | — | — | — |
| ±65 mV | EX+ 2 [2] | — | EX- [2] | — | — | I-AI+ | AI- 3 | — | — | — |
| Okugcwele-
Ibhuloho |
EX+ [2] | — | EX- [2] | RS+ | RS- | I-AI+ | AI- | SC | SC | — |
| IEPE | — | I-AI+ | AI- | — | — | — | — | — | — | — |
| I-TEDS | — | T+ 4 | T- | — | — | — | — | — | — | T+ 5 |
Izincazelo zesiginali
| Isiginali | Incazelo |
| I-AI+ | Positive analogue input signal connection |
| AI- | Negative analogue input signal connection |
| EX+ | Positive sensor excitation connection |
| EX- | Negative sensor excitation connection |
| RS+ | Positive remote sensing connection |
| RS- | Negative remote sensing connection |
| SC | Shunt calibration connection |
| T+ | TEDS data connection |
| T- | TEDS return connection |
Izinhlobo Zokulinganisa
I-NI-9218 inikeza ukwesekwa okwakhelwe ngaphakathi kwezinhlobo zokulinganisa ezilandelayo.
- ±16 V
- ±65 mV
- Full-Bridge
- IEPE
- NI-9218 with LEMO only.
- Optional sensor excitation.
- Tie to pin 3.
- TEDS Class 1 data connection.
- TEDS Class 2 data connection.
Ithiphu NI recommends using the NI-9982 screw-terminal adapter when using built-in measurement types on the NI-9218.
I-NI-9218 inikeza ukwesekwa okwengeziwe kwezinhlobo zokulinganisa ezilandelayo uma usebenzisa i-adaptha eqondene nokulinganisa.
- ±20 mA, requires the NI-9983
- ±60 V, requires the NI-9987
- Half-Bridge requires the NI-9986
- Quarter-Bridge requires the NI-9984 (120 Ω) or NI-9985 (350 Ω)
±16 V Izixhumanisi
I-NI-9218 ihlinzeka ngokuzikhethela kwenzwa eyi-12 V. Ukuze usebenzise i-excitation engu-12 V, xhuma i-9 VDC kuya ku-30 VDC amandla kagesi ku-Vsup, xhuma amatheminali e-excitation kunzwa yakho ku-EX+/EX-, futhi unike amandla i-12 V excitation kusofthiwe yakho.
Ireferensi ehlobene:
- I-NI-9982 ±16 V Iphinikhodi yokuxhuma
±65 mV Izixhumanisi
- You must connect AI to EX- on the NI-9218.
- I-NI-9218 ihlinzeka ngokuzikhethela kwenzwa eyi-12 V. Ukuze usebenzise i-excitation engu-12 V, xhuma i-9 VDC kuya ku-30 VDC amandla kagesi ku-Vsup, xhuma amatheminali e-excitation kunzwa yakho ku-EX+/EX-, futhi unike amandla i-12 V excitation kusofthiwe yakho.
Ireferensi ehlobene
- I-NI-9982 ±65 mV Iphinikhodi yokuxhuma
Izixhumanisi Zebhuloho Eligcwele
- The NI-9218 provides 2 V excitation to loads ≥120 Ω or 3.3 V excitation to loads ≥350 Ω.
- The NI-9218 provides optional connections for remote sensing (RS) and shunt calibration (SC). Remote sensing corrects for errors in excitation leads, and shunt calibration corrects for errors caused by resistance within one leg of the bridge.
Ireferensi ehlobene:
- I-NI-9982 Full-Bridge Connection Pinout
IEPE Connections
- The NI-9218 provides an excitation current for each channel that powers IEPE sensors.
- AI+ provides DC excitation, and AI- provides the excitation return path.
Ireferensi ehlobene:
- I-NI-9982 IEPE Connection Pinout
±20 mA Izixhumi
- Connecting ±20 mA signals requires the NI-9983.
- I-NI-9218 ihlinzeka ngokuzikhethela kwenzwa eyi-12 V. Ukuze usebenzise i-excitation engu-12 V, xhuma i-9 VDC kuya ku-30 VDC amandla kagesi ku-Vsup, xhuma amatheminali e-excitation kunzwa yakho ku-EX+/EX-, futhi unike amandla i-12 V excitation kusofthiwe yakho.
Connecting a loop-powered 2-wire or 3-wire transducer requires adding a 20 kΩ resistor between AI- and Ex-.
Ireferensi ehlobene:
- I-NI-9983
±60 V Izixhumanisi
Connecting ±60 V signals requires the NI-9987.
Ireferensi ehlobene:
- I-NI-9987
Izixhumanisi ze-Half-Bridge
- Connecting half bridges requires the NI-9986.
- The NI-9218 provides 2 V excitation to half bridges of ≥240 Ω total or 3.3 V excitation to half bridges of ≥700 Ω total.
- The NI-9218 provides optional connections for remote sensing (RS) and shunt calibration (SC). Remote sensing corrects for errors in excitation leads, and shunt calibration corrects for errors caused by resistance within one leg of the bridge.
Ireferensi ehlobene:
- I-NI-9986
Izixhumanisi zeQuarter-Bridge
- Connecting 120 Ω quarter bridges requires the NI-9984.
- Connecting 350 Ω quarter bridges requires the NI-9985.
Ithiphu NI-recommends 2 V excitation when using a NI-9984 with 120 Ω quarter bridges and 3.3 V excitation when using the NI-9985 with 350 Ω quarter bridges.
Ireferensi ehlobene:
- NI-9984/9985 Pinout
Izixhumanisi ze-TEDS
For more information about TEDS, visit ni.com/info and enter the Info Code rdteds.
Ukusekelwa kwe-TEDS
- Izinzwa ze-TEDS Class 1 zinikeza isixhumi esibonakalayo sokudlulisa ulwazi kusuka kuzinzwa. I-NI-9218 ene-LEMO, NI-9218 ene-DSUB, NI-9982L, NI-9982D, NI-9982F isekela izinzwa ze-TEDS Class 1.
- TEDS Class 2 sensors provide an interface for transferring information from TEDS-enabled sensors. The NI-9218 with LEMO, NI-9982L, NI-9983L, NI-9984L, NI-9985L, and NI-9986L support TEDS Class 2 sensors.
I-Vsup Daisy Chain Topology
I-NI-9218 ene-LEMO inikeza izikhonkwane ezine kusixhumi se-Vsup se-daisy chaining.
I-NI-9218 Connection Guidelines
Make sure that the devices you connect to the NI-9218 are compatible with the module specifications.
Imihlahlandlela yekhebula yangokwezifiso
- Qaphela le mihlahlandlela elandelayo lapho usebenzisa i-adaptha yesixhumi senkomishi ye-solder ye-NI-9988 noma isixhumi se-LEMO crimp (784162-01) ukuze udale izintambo zangokwezifiso.
- Use a shielded cable for all signals.
- Connect the cable shield to the earth ground.
- Use twisted-pair wiring for the AI+/AI- and RS+/RS- signals to achieve specified EMC performance.
I-NI-9218 Block Diagram
- Two 24-bit analogue-to-digital converters (ADCs) simultaneously sampzombili iziteshi ze-AI.
- The NI-9218 provides channel-to-channel isolation.
- The NI-9218 reconfigures the signal conditioning for each measurement type.
- The NI-9218 provides excitation for IEPE and bridge completion measurement types.
- The NI-9218 can provide optional 12 V sensor excitation for ±16 V, ±65 mV, and ±20 mA measurement types.
±16 V kanye ne-±65 mV Signal Conditioning
Amasignali okokufaka esiteshini ngasinye afakwe kubhafa, afakwe esimweni, bese kuba ngu-sampeholwa yi-ADC.
I-Full-Bridge Signal Conditioning
- The analogue input connections sense and then amplify the incoming analogue signal.
- The excitation connections provide differential bridge-excitation voltage.
- Remote sensing continuously and automatically corrects for lead-wire induced excitation voltage loss when using the RS connections.
- Shunt calibration can be used to correct for lead-wire-induced desensitisation of the bridge.
I-IEPE Signal Conditioning
- The incoming analogue signal is referenced to an isolated ground.
- Each channel is configured for AC coupling with an IEPE current.
- Each channel provides a TEDS Class 1 interface.
±20 mA Isimo Sesignali
The NI-9983 provides a current shunt for the incoming analogue signal.
±60 V Isimo Sesiginali
The NI-9987 provides an attenuator for the incoming analogue signal.
Isimo Sesignali seHalf-Bridge
- The NI-9886 provides half-bridge completion resistors for the incoming analogue signal.
- You must connect AI+, EX+, and EX-.
- RS+ and RS- connections are optional.
- You do not need to connect the AI signal because it is connected internally.
Isimo Semodi yeQuarter-Bridge
The NI-9984 and NI-9985 provide a quarter-bridge completion resistor and a half-bridge completion resistor.
Ukuhlunga
The NI-9218 uses a combination of analogue and digital filtering to provide an accurate representation of in-band signals while rejecting out-of-band signals. The filters discriminate between signals based on the frequency range, or bandwidth, of the signal. The three important bandwidths to consider are the passband, the stopband, and the alias-free bandwidth.
I-NI-9218 imele amasiginali ngaphakathi kwebhendi yokudlula, njengoba ibalwa ngokuyinhloko ngokuzwakala kwe-passband ripple kanye ne-phase nonlinearity. Wonke amasiginali avela kumkhawulokudonsa ongena-alias amasiginali angahlukanisiwe noma amasiginali ahlungwe okungenani inani lokwaliwa kwe-stopband.
I-passband
Amasignali angaphakathi kwebhendi yokudlula anokuzuzwa noma ukuncipha okuncike kufrikhwensi. Inani elincane lokwehluka kwenzuzo ngokuphathelene nemvamisa kubizwa ngokuthi i-passband flatness. Izihlungi zedijithali ze-NI-9218 zilungisa ibanga lemvamisa yebhendi yokudlula ukuze ifane nenani ledatha. Ngakho-ke, inani lenzuzo noma ukuncipha emvamisa ethile lincike esilinganisweni sedatha.
Ibhande lokumisa
Isihlungi sinciphisa ngokuphawulekayo wonke amasignali ngaphezu kwefrikhwensi ye-stopband. Umgomo oyinhloko wesihlungi ukuvimbela ukubizwa ngamagama. Ngakho-ke, imvamisa ye-stopband sikala ngokunembile nenani ledatha. Ukwenqatshwa kwe-stopband inani elincane lokuncishiswa elisetshenziswa isihlungi kuwo wonke amasignali anefrikhwensi ngaphakathi kwebhande lokumisa.
I-Alias-Free Bandwidth
Any signal that appears in the alias-free bandwidth of the NI-9218 is not an aliased artefact of signals at a higher frequency. The alias-free bandwidth is defined by the ability of the filter to reject frequencies above the stopband frequency, and it is equal to the data rate minus the stopband frequency.
Ukuvula i-adaptha yokukala
Okufanele ngikwenze
- Unlock the measurement adapter housing/cover.
- Slide the measurement adapter housing/cover to access the screw terminals.
Ukukhweza i-NI-998xD/998xL
Ongakusebenzisa
- NI-998xD or NI-998xL Measurement Adapter
- M4 or Number 8 Screw
- Isikulufi
Okufanele ngikwenze
Mount the measurement adapter to a flat surface using the mounting hole on the measurement adapter and the screw.
I-Adaptha Yokulinganisa Ukumisa
Amatheminali aphansi ku-adaptha yokulinganisa axhunywe endaweni ye-chassis lapho i-adaptha yokulinganisa ixhunywe ku-NI-9218 futhi i-NI-9218 ifakwe ku-chassis.
Amaphinikhodi we-adaptha yokulinganisa
Izigaba ezilandelayo zifaka phakathi amaphinikhodi ama-adaptha okulinganisa we-NI-9218.
I-NI-9982 ±16 V Iphinikhodi yokuxhuma
Pins 3a and 3b are tied together on the NI-9982.
Ireferensi ehlobene:
- ±16 V Izixhumanisi
I-NI-9982 ±65 mV Iphinikhodi yokuxhuma
Pins 3a and 3b are tied together on the NI-9982.
Ireferensi ehlobene:
- ±65 mV Izixhumanisi
I-NI-9982 Full-Bridge Connection Pinout
Pins 3a and 3b are tied together on the NI-9982.
Ireferensi ehlobene:
- Izixhumanisi Zebhuloho Eligcwele
I-NI-9982 IEPE Connection Pinout
Pins 3a and 3b are tied together on the NI-9982.
Ireferensi ehlobene:
- IEPE Connections
I-NI-9983
Pins 3a and 3b are tied together on the NI-9983.
Ireferensi ehlobene:
- ±20 mA Izixhumi
NI-9984/9985 Pinout
Ireferensi ehlobene:
- Izixhumanisi zeQuarter-Bridge
I-NI-9986
Pins 3a and 3b are tied together on the NI-9986.
Ireferensi ehlobene:
- Izixhumanisi ze-Half-Bridge
I-NI-9987
Pins 3a and 3b are tied together on the NI-9987.
Ireferensi ehlobene:
- ±60 V Izixhumanisi
FAQ
Amadokhumenti / Izinsiza
 |
Amathuluzi Kazwelonke NI-9218 Imojuli yokufaka ye-Analog yesiteshi [pdf] Incwadi Yeziqondiso I-NI-9218 ene-LEMO, i-NI-9218 ene-DSUB, i-NI-9218 Channel Analog Input Module, NI-9218, Imojula yokufaka ye-Analog yesiteshi, i-Analog Input Module, Imojula yokufaka |