National Instruments NI-9218 Channel Analogue Input Module
Spesifikaasjes
- produkt Namme: NI-9218
- Ferbiningstypen: LEMO en DSUB
- Mjittypen: Ynboude stipe foar ferskate typen
- Sensor-oanstjoering: Opsjonele 12V-oanstjoering
Connector Soarten
De NI-9218 hat mear as ien ferbiningstype: NI-9218 mei LEMO en NI-9218 mei DSUB. Behalven as it ferbiningstype spesifisearre is, ferwiist NI-9218 nei beide ferbiningstypen.
NI-9218 Pinout
Signals by Measurement Type
| Wize | Pin
1 |
|||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| ±16 V | EX+ | — | KI-, EX- | — | — | AI+ | — | — | — | — |
| ± 65 mV | EX+ 2 [2] | — | EX- [2] | — | — | AI+ | AI- 3 | — | — | — |
| Fol-
Brêge |
EX+ [2] | — | EX- [2] | RS+ | RS- | AI+ | AI- | SC | SC | — |
| IEPE | — | AI+ | AI- | — | — | — | — | — | — | — |
| TEDS | — | T+ 4 | T- | — | — | — | — | — | — | T+ 5 |
Sinjaal beskriuwings
| Sinjaal | Beskriuwing |
| 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 |
Measurement Soarten
De NI-9218 biedt ynboude stipe foar de folgjende mjittypen.
- ±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.
Tip NI recommends using the NI-9982 screw-terminal adapter when using built-in measurement types on the NI-9218.
De NI-9218 biedt ekstra stipe foar de folgjende mjittypen by it brûken fan in mjitspesifike adapter.
- ±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 Ferbiningen
De NI-9218 biedt opsjonele 12 V sensor-eksitaasje. Om de 12 V-eksitaasje te brûken, ferbine in 9 VDC nei 30 VDC stroomfoarsjenning mei Vsup, ferbine de eksitaasjeterminals op jo sensor mei EX+/EX-, en skeakelje 12 V-eksitaasje yn jo software yn.
Relatearre referinsje:
- NI-9982 ±16 V ferbiningspinout
±65 mV Ferbiningen
- You must connect AI to EX- on the NI-9218.
- De NI-9218 biedt opsjonele 12 V sensor-eksitaasje. Om de 12 V-eksitaasje te brûken, ferbine in 9 VDC nei 30 VDC stroomfoarsjenning mei Vsup, ferbine de eksitaasjeterminals op jo sensor mei EX+/EX-, en skeakelje 12 V-eksitaasje yn jo software yn.
Related referinsje
- NI-9982 ±65 mV Ferbiningspinút
Folsleine-brêgeferbiningen
- 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.
Relatearre referinsje:
- NI-9982 Folsleine-brêgeferbining Pinout
IEPE-ferbiningen
- 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.
Relatearre referinsje:
- NI-9982 IEPE Connection Pinout
±20 mA Ferbiningen
- Connecting ±20 mA signals requires the NI-9983.
- De NI-9218 biedt opsjonele 12 V sensor-eksitaasje. Om de 12 V-eksitaasje te brûken, ferbine in 9 VDC nei 30 VDC stroomfoarsjenning mei Vsup, ferbine de eksitaasjeterminals op jo sensor mei EX+/EX-, en skeakelje 12 V-eksitaasje yn jo software yn.
Connecting a loop-powered 2-wire or 3-wire transducer requires adding a 20 kΩ resistor between AI- and Ex-.
Relatearre referinsje:
- NI-9983 Pinout
±60 V Ferbiningen
Connecting ±60 V signals requires the NI-9987.
Relatearre referinsje:
- NI-9987 Pinout
Healbrêgeferbiningen
- 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.
Relatearre referinsje:
- NI-9986 Pinout
Kwartbrêgeferbiningen
- Connecting 120 Ω quarter bridges requires the NI-9984.
- Connecting 350 Ω quarter bridges requires the NI-9985.
Tip 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.
Relatearre referinsje:
- NI-9984/9985 Pinout
TEDS-ferbiningen
For more information about TEDS, visit ni.com/info and enter the Info Code rdteds.
TEDS-stipe
- TEDS Klasse 1-sensoren leverje in ynterface foar it oerdragen fan ynformaasje fan sensoren. De NI-9218 mei LEMO, NI-9218 mei DSUB, NI-9982L, NI-9982D, NI-9982F stypje TEDS Klasse 1-sensoren.
- 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.
Vsup Daisy Chain Topology
De NI-9218 mei LEMO leveret fjouwer pinnen op 'e Vsup-ferbining foar daisy chaining.
NI-9218 Ferbiningsrjochtlinen
Make sure that the devices you connect to the NI-9218 are compatible with the module specifications.
Rjochtlinen foar oanpaste bekabeling
- Folgje de folgjende rjochtlinen by it brûken fan de NI-9988 soldeerkopferbiningsadapter of de LEMO-krimpferbining (784162-01) om oanpaste kabels te meitsjen.
- 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.
NI-9218 Blokdiagram
- Two 24-bit analogue-to-digital converters (ADCs) simultaneously sampbeide AI-kanalen.
- 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 en ±65 mV Sinjaalkonditionering
Ynfiersignalen op elk kanaal wurde bufferd, kondisjonearre en dan sampûnder lieding fan in ADC.
Folsleine-brêge sinjaalkonditionering
- 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.
IEPE-sinjaalkonditionering
- 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 Sinjaalkonditionering
The NI-9983 provides a current shunt for the incoming analogue signal.
±60 V Sinjaalkonditionering
The NI-9987 provides an attenuator for the incoming analogue signal.
Half-Bridge Signal Conditioning
- 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.
Kwartbrêgemoduskonditionering
The NI-9984 and NI-9985 provide a quarter-bridge completion resistor and a half-bridge completion resistor.
Filtering
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.
De NI-9218 fertsjintwurdiget sinjalen binnen de passband, sa't primêr kwantifisearre wurdt troch passbandrimpel en faze-nonlineariteit. Alle sinjalen dy't ferskine yn 'e aliasfrije bânbreedte binne of net-aliasearre sinjalen of sinjalen dy't filtere binne troch teminsten de hoemannichte fan 'e stopbandôfwizing.
Passband
De sinjalen binnen de passband hawwe frekwinsje-ôfhinklike fersterking of ferswakking. De lytse hoemannichte fariaasje yn fersterking mei respekt foar frekwinsje wurdt de passbandflakheid neamd. De digitale filters fan 'e NI-9218 oanpasse it frekwinsjeberik fan 'e passband om oerien te kommen mei de datasnelheid. Dêrom hinget de hoemannichte fersterking of ferswakking by in bepaalde frekwinsje ôf fan 'e datasnelheid.
Stopband
It filter ferswakket alle sinjalen boppe de stopbandfrekwinsje signifikant. It primêre doel fan it filter is om aliasing te foarkommen. Dêrom skaalet de stopbandfrekwinsje presys mei de datasnelheid. De stopbandôfwizing is de minimale hoemannichte ferswakking dy't troch it filter tapast wurdt op alle sinjalen mei frekwinsjes binnen de stopband.
Aliasfrije bânbreedte
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.
In mjitadapter iepenje
Wat te dwaan
- Unlock the measurement adapter housing/cover.
- Slide the measurement adapter housing/cover to access the screw terminals.
De NI-998xD/998xL ynstallearje
Wat te brûken
- NI-998xD or NI-998xL Measurement Adapter
- M4 or Number 8 Screw
- Schroevendraaier
Wat te dwaan
Mount the measurement adapter to a flat surface using the mounting hole on the measurement adapter and the screw.
Mjitadapter Aarding
De ierdklemmen op in mjitadapter binne ferbûn mei chassisgrûn as de mjitadapter ferbûn is mei de NI-9218 en de NI-9218 yn in chassis ynstalleare is.
Mjitadapter Pinouts
De folgjende seksjes befetsje pinouts foar de NI-9218 mjitadapters.
NI-9982 ±16 V ferbiningspinout
Pins 3a and 3b are tied together on the NI-9982.
Relatearre referinsje:
- ±16 V Ferbiningen
NI-9982 ±65 mV Ferbiningspinút
Pins 3a and 3b are tied together on the NI-9982.
Relatearre referinsje:
- ±65 mV Ferbiningen
NI-9982 Folsleine-brêgeferbining Pinout
Pins 3a and 3b are tied together on the NI-9982.
Relatearre referinsje:
- Folsleine-brêgeferbiningen
NI-9982 IEPE Connection Pinout
Pins 3a and 3b are tied together on the NI-9982.
Relatearre referinsje:
- IEPE-ferbiningen
NI-9983 Pinout
Pins 3a and 3b are tied together on the NI-9983.
Relatearre referinsje:
- ±20 mA Ferbiningen
NI-9984/9985 Pinout
Relatearre referinsje:
- Kwartbrêgeferbiningen
NI-9986 Pinout
Pins 3a and 3b are tied together on the NI-9986.
Relatearre referinsje:
- Healbrêgeferbiningen
NI-9987 Pinout
Pins 3a and 3b are tied together on the NI-9987.
Relatearre referinsje:
- ±60 V Ferbiningen
FAQ
Dokuminten / Resources
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National Instruments NI-9218 Kanaal Analoge Ynfiermodule [pdf] Ynstruksjehânlieding NI-9218 mei LEMO, NI-9218 mei DSUB, NI-9218 Kanaal analoge ynfiermodule, NI-9218, Kanaal analoge ynfiermodule, Analoge ynfiermodule, Ynfiermodule |