National Instruments NI-9218 Channel Analogue Input Module
Litlhaloso
- Lebitso la Sehlahisoa: NI-9218
- Mefuta ea likhokahanyo: LEMO le DSUB
- Mefuta ea Tekanyo: Tšehetso e hahiloeng bakeng sa mefuta e fapaneng
- Phatlalatso ea Sensor: Boikhethelo ba 12V excitation
Mefuta ea likhokahanyo
NI-9218 e na le mefuta e fetang e le 'ngoe ea lihokelo: NI-9218 e nang le LEMO le NI-9218 e nang le DSUB. Ntle le haeba mofuta oa sehokelo o boletsoe, NI-9218 e bua ka mefuta e 'meli ea sehokelo.
Setšoantšo sa NI-9218
Signals by Measurement Type
| Mokhoa | Pin
1 |
|||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| ± 16 V | EX+ | — | AI-, EX- | — | — | AI + | — | — | — | — |
| ± 65 mV | EX+ 2 [2] | — | EX- [2] | — | — | AI + | AI- 3 | — | — | — |
| E felletseng-
Borokho |
EX+ [2] | — | EX- [2] | RS+ | RS- | AI + | AI- | SC | SC | — |
| IEPE | — | AI + | AI- | — | — | — | — | — | — | — |
| TEDS | — | T+ 4 | T- | — | — | — | — | — | — | T+ 5 |
Litlhaloso tsa Lipontšo
| Letshwao | Tlhaloso |
| 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 |
Mefuta ea Tekanyo
NI-9218 e fana ka tšehetso e hahelletsoeng bakeng sa mefuta e latelang ea litekanyo.
- ± 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.
Keletso NI recommends using the NI-9982 screw-terminal adapter when using built-in measurement types on the NI-9218.
NI-9218 e fana ka tšehetso e eketsehileng bakeng sa mefuta e latelang ea litekanyo ha u sebelisa adaptara e khethehileng ea tekanyo.
- ±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 Lihokelo
NI-9218 e fana ka boikhethelo ba 12 V sensor excitation. Ho sebelisa 12 V excitation, hokela 9 VDC ho 30 VDC phepelo ea matla ho Vsup, hokela li-terminals tsa ho hlasimolla ho sensor ea hau ho EX +/EX-, 'me u nolofalletse ho hlasimoloha ha 12 V ho software ea hau.
Referense e amanang:
- NI-9982 ± 16 V Pinout ea Khokahano
± 65 mV Mahokelo
- You must connect AI to EX- on the NI-9218.
- NI-9218 e fana ka boikhethelo ba 12 V sensor excitation. Ho sebelisa 12 V excitation, hokela 9 VDC ho 30 VDC phepelo ea matla ho Vsup, hokela li-terminals tsa ho hlasimolla ho sensor ea hau ho EX +/EX-, 'me u nolofalletse ho hlasimoloha ha 12 V ho software ea hau.
Related reference
- NI-9982 ± 65 mV Khokahanyo Pinout
Lihokelo tsa Borokho bo Felletseng
- 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.
Referense e amanang:
- NI-9982 Full-Bridge Connection Pinout
IEPE likhokahano
- 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.
Referense e amanang:
- NI-9982 IEPE Connection Pinout
±20 mA likhokahano
- Connecting ±20 mA signals requires the NI-9983.
- NI-9218 e fana ka boikhethelo ba 12 V sensor excitation. Ho sebelisa 12 V excitation, hokela 9 VDC ho 30 VDC phepelo ea matla ho Vsup, hokela li-terminals tsa ho hlasimolla ho sensor ea hau ho EX +/EX-, 'me u nolofalletse ho hlasimoloha ha 12 V ho software ea hau.
Connecting a loop-powered 2-wire or 3-wire transducer requires adding a 20 kΩ resistor between AI- and Ex-.
Referense e amanang:
- Setšoantšo sa NI-9983
± 60 V Lihokelo
Connecting ±60 V signals requires the NI-9987.
Referense e amanang:
- Setšoantšo sa NI-9987
Lihokelo tsa 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.
Referense e amanang:
- Setšoantšo sa NI-9986
Khokahano ea Kotara-Borokho
- Connecting 120 Ω quarter bridges requires the NI-9984.
- Connecting 350 Ω quarter bridges requires the NI-9985.
Keletso 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.
Referense e amanang:
- NI-9984/9985 Pinout
Lihokelo tsa TEDS
For more information about TEDS, visit ni.com/info and enter the Info Code rdteds.
Tšehetso ea TEDS
- Li-sensor tsa TEDS Class 1 li fana ka sebopeho sa ho fetisa tlhahisoleseling ho tsoa ho li-sensor. NI-9218 e nang le LEMO, NI-9218 e nang le DSUB, NI-9982L, NI-9982D, NI-9982F e tšehetsa li-sensor tsa 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.
Vsup Daisy Chain Topology
NI-9218 e nang le LEMO e fana ka lithakhisa tse 'nè holim'a sehokelo sa Vsup bakeng sa ketane ea daisy.
NI-9218 Litaelo tsa Khokahano
Make sure that the devices you connect to the NI-9218 are compatible with the module specifications.
Litaelo tse Tloaelehileng tsa Cabling
- Ela hloko litataiso tse latelang ha u sebelisa adaptara ea komiki ea solder ea NI-9988 kapa sehokelo sa LEMO crimp (784162-01) ho etsa lithapo tsa tloaelo.
- 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.
Setšoantšo sa NI-9218 Block
- Two 24-bit analogue-to-digital converters (ADCs) simultaneously sample likanale tsa AI ka bobeli.
- 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 le ± 65 mV Signal Conditioning
Matshwao a kenyang kanaleng e nngwe le e nngwe a behilwe, a behilwe, ebe sampe etelletsoeng pele ke ADC.
Boemo ba Letšoao la Borokho bo Tletseng
- 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 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 Maemo a Matšoao
The NI-9983 provides a current shunt for the incoming analogue signal.
± 60 V Signal Conditioning
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.
Kotara-Bridge Mode Conditioning
The NI-9984 and NI-9985 provide a quarter-bridge completion resistor and a half-bridge completion resistor.
Ho sefa
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.
NI-9218 e emela matšoao ka har'a passband, joalo ka ha e lekantsoe haholo-holo ke passband ripple le phase nonlinearity. Lipontšo tsohle tse hlahang ka har'a bandwidth e sa sebetseng e ka ba mats'oao a sa sebetseng kapa mats'oao a hloekisitsoeng ke bonyane palo ea ho hanoa ha stopband.
Passband
Lipontšo tse ka har'a passband li na le phaello kapa ho fokotseha ho itšetlehileng ka makhetlo. Phapang e nyane ea phaello mabapi le khafetsa e bitsoa "passband flatness". Li-filters tsa dijithale tsa NI-9218 li fetola lebelo la maqhubu a phaseband ho tsamaisana le sekhahla sa data. Ka hona, palo ea phaello kapa ho fokotseha ka makhetlo a mangata ho itšetlehile ka sekhahla sa data.
Sethibelo
Setlhopha se fokolisa mats'oao 'ohle ka holim'a maqhubu a stopband. Sepheo sa mantlha sa filthara ke ho thibela aliasing. Ka hona, sekhahla sa "stopband frequency sekala" hantle ka sekhahla sa data. Stopband rejection ke bonyane ba palo e sebelisoang ke sefe ho mats'oao ohle a nang le maqhubu ka har'a stopband.
Bandwidth ea Mahala
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.
Ho bula Adapter ea Tekanyo
Se o lokelang ho se etsa
- Unlock the measurement adapter housing/cover.
- Slide the measurement adapter housing/cover to access the screw terminals.
Ho kenya NI-998xD/998xL
Seo U ka se Sebelisang
- NI-998xD or NI-998xL Measurement Adapter
- M4 or Number 8 Screw
- Screwdriver
Se o lokelang ho se etsa
Mount the measurement adapter to a flat surface using the mounting hole on the measurement adapter and the screw.
Tekanyo ea Adapter Grounding
Li-terminals tse holim'a adaptara ea litekanyo li hokahantsoe le sebaka sa chassis ha adaptara ea tekanyo e hokahantsoe le NI-9218 mme NI-9218 e kentsoe ka chassis.
Litekanyo tsa Adapter Pinouts
Likarolo tse latelang li kenyelletsa li-pinouts tsa li-adapter tsa tekanyo ea NI-9218.
NI-9982 ± 16 V Pinout ea Khokahano
Pins 3a and 3b are tied together on the NI-9982.
Referense e amanang:
- ± 16 V Lihokelo
NI-9982 ± 65 mV Khokahanyo Pinout
Pins 3a and 3b are tied together on the NI-9982.
Referense e amanang:
- ± 65 mV Mahokelo
NI-9982 Full-Bridge Connection Pinout
Pins 3a and 3b are tied together on the NI-9982.
Referense e amanang:
- Lihokelo tsa Borokho bo Felletseng
NI-9982 IEPE Connection Pinout
Pins 3a and 3b are tied together on the NI-9982.
Referense e amanang:
- IEPE likhokahano
Setšoantšo sa NI-9983
Pins 3a and 3b are tied together on the NI-9983.
Referense e amanang:
- ±20 mA likhokahano
NI-9984/9985 Pinout
Referense e amanang:
- Khokahano ea Kotara-Borokho
Setšoantšo sa NI-9986
Pins 3a and 3b are tied together on the NI-9986.
Referense e amanang:
- Lihokelo tsa Half Bridge
Setšoantšo sa NI-9987
Pins 3a and 3b are tied together on the NI-9987.
Referense e amanang:
- ± 60 V Lihokelo
LBH
Litokomane / Lisebelisoa
 |
Lisebelisoa tsa Naha NI-9218 Channel Analog Input Module [pdf] Buka ea Taelo NI-9218 e nang le LEMO, NI-9218 e nang le DSUB, NI-9218 Channel Analog Input Module, NI-9218, Channel Analog Input Module, Analog Input Module, Input Module |