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NI WSN-3214 User Guide and Specifications

1. Puen en eee EU Regulatory Statements Cesk National Instruments timto prohlaSuje _e tento NI WSN 3214 je ve shod se zakladnimi cs y p je i J s Czech po_adavky a dal mi p slu n mi ustanoven mi sm rnice 1999 5 ES Dansk Undertegnede National Instruments erkl rer herved at fflgende udstyr NI WSN 3214 g g yl Danish overholder de v sentlige krav og fvrige relevante krav i direktiv 1999 5 EF Deutsch Hiermit erklart National Instruments dass sich das Gerat NI WSN 3214 in German bereinstimmung mit den grundlegenden Anforderungen und den brigen einschl gigen Bestimmungen der Richtlinie 1999 5 EG befindet Eesti Kaesolevaga kinnitabNational Instruments seadme NI WSN 3214 vastavust direktiivi g Estonian 1999 5 EU p hin uetele ja nimetatud direktiivist tulenevatele teistele asjakohastele s tetele English Hereby National Instruments declares that this NI WSN 3214 is in compliance with the g y p essential requirements and other relevant provisions of Directive 1999 5 EC Espa ol Por medio de la presente National Instruments declara que el NI WSN 3214 cumple con es p p q p Spanish los requisitos esenciales y cualesquiera otras disposiciones aplicables o exigibles de la Directiva 1999 5 CE NI WSN 3214 User Guide and Specifications 50 ni com EAAnviKh Greek ME THN l IAPOY2A National Instruments AHAONEI OTI NI WSN 3214
2. S em um 25 40 mm 100in lt 85 85 mm 3 380 in 1 665 in 508mm Figure 2 NI WSN 3214 Device Dimensions Safety Guidelines Operate the NI WSN 3214 device only as described in this user guide AN Hot Surface This icon denotes that the component may be hot Touching this component may result in bodily injury NI WSN Safety Information The following section contains important safety information that you must follow when installing and using NI WSN products UN Caution Do not operate the NI WSN product in a manner not specified in the user manual or operating instructions Product misuse can result in a hazard You can compromise the safety NI WSN 3214 User Guide and Specifications 2 ni com protection built into the product if the product is damaged in any way If the product is damaged return it to National Instruments for repair Caution Do not substitute parts or modify the NI WSN product Use the product only with the devices accessories and cables specified in the installation instructions Caution Do not operate NI WSN products in an explosive atmosphere or where there may be flammable gases or fumes Caution If you need to clean a NI WSN product wipe it with a dry towel The product must be completely dry and free from contaminants before you return it to service Caution Operate the product indoors only at or below Pollution Degre
3. Channel 1 Sample 4Channels 10 Samples 6 4Channels 1 Sample 1 Channel 100 Samples 1 Channel 10 Samples 4Channels 100 Samples eee Battery Life Years T T T 300 400 500 600 Time Interval Seconds T T 0 100 200 Test Conditions NI LabVIEW WSN Module up to 10 User defined Variables Sent per Radio Interval 50 60 Hz High Rejection Figure 39 NI LabVIEW WSN Battery Life Versus Time Intervals Number of Channels and Number of Samples per Waveform with No Waveform Sent Over the Radio National Instruments 37 NI WSN 3214 User Guide and Specifications 99 1Waveform mo a 10 Waveforms sees 50 Waveforms N Battery Life Years a d 0 54 0 100 200 300 400 500 600 Time Interval Seconds Test Conditions NI LabVIEW WSN Module 10 Samples per Waveform 50 60 Hz High Rejection 4 Channels 350 Full Bridge Figure 40 NI LabVIEW WSN Battery Life Versus Time Interval and Number of Waveforms Acquired for Each Waveform Sent Over Radio sess 4CH 35090 Full Bridge 4CH 1KQ Full Bridge 4CH 35090 Half Quarter Bridge m 4CH 1KQ Half Quarter Bridge ere o Battery Life Years l o a 0 T T T T T 0 100 200 300 400 500 600 Time Interval Seconds Test Conditions NI LabVIEW WSN Module 10 Samples per Wave
4. eeeeeeeeeeee 20 bits Type Of ADC centre Oversampled converter b nce No missing codes guaranteed Modes configurable per channel Full bridge half bridge quarter bridge Bridge completion Quarter bridge and half bridge Internal Bridge resistance FulbEbridge noe eEEERERUUR 350 1 000 Q Halt bfidge i ete eene 350 1 000 Q Qu rter bridge esee totes 350 1 000 Q Powerline filtering modes usse 50 Hz 60 Hz 50 60 Hz none Overvoltage protection 30 VDC Input tange ftre tret tin 20 mV V Table 3 Accuracy Percent of Range Percent of Offset Error Measurement Reading Conditions Gain Error Full Bridge Half Bridge Quarter Bridge Typical 25 C 5 C 0 1 0 005 0 7 0 5 1 A V V 140 u V V 100 u V V Maximum 40 to 70 C 0 45 0 03 1 1 6 u V V 200 u V V 200 u V V After using shunt calibration for quarter bridge and using remote sensing for full half bridge to remove errors from lead wire resistance Range equals 20 mV V Before offset null The offset error can be removed for current temperature conditions by using offset null After doing offset null the offset error of the measurement is determined by the temperature drifts over the expected temperature range For example if you perform an offset null for a half bridge measurement at a tempera
5. DIO PWR T High Side Switch P External DIO DI o Q 2 Device s Poner Internal Supply DGND T NI WSN 3214 L Figure 30 Connecting a Device to the NI WSN 3214 in Drive High Mode Drive Low Sinking Drive Low Sinking mode is for devices that require low side drive or a sinking output When using this mode The DIOx terminal is pulled to DGND when you turn on the channel Writing a digital value of 0 turns on the channel and writing a digital value of 1 turns off the channel National Instruments 31 NI WSN 3214 User Guide and Specifications The channel is high impedance when the channel is turned off 1 e When driving inductive loads use an external flyback diode or snubber circuit as shown in Figure 31 NI WSN 3214 M y Flyback Diode i D o DIOx Device Internal External i Power Low Side Switch i BENE T Supply Figure 31 Connecting a Device to the NI WSN 3214 in Drive Low Sinking Mode 3V TTL Logic Open Collector with Pull Up The 3V TTL Logic Open Collector with Pull Up mode can be used to connect to 3 V and 5 V logic inputs with TTL Logic compatible thresholds When using this mode TheDIOx terminal is pulled up to 3 V through a pull up resistor for a DIO output value of 1 and driven low to ground for a DIO output value 0 The DIO line is read with 3V TTL
6. R4 Active element measuring tensile strain GF Gage Factor specified by the gage manufacturer Vcy Measured voltage of the bridge Vgx Excitation voltage provided by the NI WSN 3214 V Offset compensated ratiometric bridge output defined by the following equation CH T y Dd x Shunt Calibration Offset Null EX Note The ratio of the bridge output voltage to the excitation voltage is calculated internally on the NI WSN 3214 Shunt Calibration is only supported for quarter bridge If you are switching from using a quarter bridge to a half bridge or full bridge configuration you need to specify 1 for Shunt Calibration and then perform Offset Null in the software The NI WSN 3214 converts the readings to strain using the following equation V F strain GF NI WSN 3214 User Guide and Specifications 22 ni com Full Bridge Type Il This section provides information for the full bridge type II strain gage configuration The full bridge type II only measures bending strain Figure 21 shows how to position strain gage resistors in a bending configuration Figure 22 shows the full bridge type II circuit wiring diagram Rejects Axial Measures Bending Figure 21 Full Bridge Type II Rejecting Axial and Measuring Bending Strain A full bridge type II configuration has the following characteristics Four active strain gage elements Two are mounted in the direction of bending strain with one
7. and RS together When using full bridge pair IN NI WSN 3214 User Guide and Specifications 28 ni com When powering the NI WSN 3214 from a floating power supply source like an external battery or isolated power supply the measurements are susceptible to picking up noise National Instruments recommends connecting the shield of the cable to both the mounting plate of the strain gage or the metal casing of a bridge based sensor and the DGND pin on the NI WSN 3214 Or connect the DGND pin on the NI WSN 3214 to Earth GND EX V C Strain Gage IN Cable Pcowe EX Shield A S77 Mounting Surface i DGND NI WSN 3214 EX V 1 Earth GND Strain C _ Reference Gage IN Supply Cable gt Reowe EX Shield A S77 i Mounting i Surface ODGND NI WSN 3214 Figure 28 Quarter Bridge Measurements Supplied From an Earth GND Referenced Supply Controlling Digital Inputs and Outputs The following sections discuss how to configure the NI WSN 3214 device for different types of input and output and how to connect external devices to the NI WSN 3214 DIO terminals On the 36 position screw terminal connector terminals 16 18 and 34 36 are the DIO section The DIO section has the following terminals e DIOx signal terminal DGND ground terminal e DIOPWR DIO Power positive required when one of the DIO channels is config
8. Power Requirements The following power requirements specifications are typical at 25 C Battery Power N Caution Do not use rechargeable batteries Internal battery etes 4 AA 1 5 V alkaline or lithium batteries Only use the following batteries Energizer E91 AA alkaline Duracell MN1500 AA alkaline Energizer L91 AA lithium Due to regulations the frequency bands depend upon country of operation National Instruments 45 NI WSN 3214 User Guide and Specifications Battery operating temperature range Energizer E91 18 C to 55 C Duracell MN1500 20 C to 54 C En tgizer LO lociones 40 C to 60 C Voltage range erinnern mercis 3 6to 7 5 V Power consumption Sleep mod iii t tete teen 0 3 mW iyi Note Power consumption and battery life varies per application Refer to the Battery Considerations section for examples that show how battery performance is impacted by settings like samples per waveform and sample interval External Power UN Caution You must use a UL Listed ITE power supply marked LPS with the NI WSN 3214 The power supply must also meet any safety and compliance requirements for the country of use Voltage Tange i t iere rte 5 to 30 V Power input mating connector ssss 2 position mini combicon Phoenix Contact part number 1714977 Power consumption Sleep mode mW 60 second sample interval 4
9. USER GUIDE AND SPECIFICATIONS NI WSN 3214 NI Wireless Sensor Network 4 Channel Quarter Half Full Bridge Input Node This user guide describes how to use the NI WSN 3214 input node and lists its specifications The NI WSN 3214 is a four channel low power wireless quarter bridge half bridge and full bridge device that works with other NI WSN 32xx nodes and gateways to form a wireless sensor network Figure 1 shows the NI WSN system components 1 NI WSN 32xx Nodes 4 NI CompactRIO Chassis 2 NI 9792 WSN Real Time Gateway 5 NI 9795 WSN C Series Gateway 3 NIWSN 9791 Ethernet Gateway 6 PC Running NI Software Figure 1 NI WSN System Components M NATIONAL P INSTRUMENTS The NI WSN system receives and analyzes distributed sensor data through one or more NI WSN gateways up to 36 NI WSN nodes per gateway and multiple PCs When you connect the NI WSN gateway you can use a separate host PC running Windows or a NI CompactRIO chassis running NI LabVIEW Real Time to display measurement results status information and to change the NI WSN gateway and NI WSN 3214 device settings Dimensions Figure 2 shows the NI WSN 3214 device dimensions ZR Se UNIUS sp Bem A bj 231 25 mm oko nll 9 104 in Sov 123 98 mm 8 4 881 in Beast 2 200 in
10. Using a Panel Mount Accessory The NI WSN 3280 3281 panel mount accessories NI part numbers 780999 01 and 781073 01 each include a retention clip and knob and integrated strain relief for power and I O wires You can use the NI WSN 3280 panel mount accessory to attach the NI WSN 3214 device to a panel or other flat surface The NI WSN 3281 panel mount accessory also includes a magnetic mount for attaching the NI WSN 3214 device to metallic surfaces Figure 6 shows the NI WSN 3214 panel mounting dimensions 78 74 mm 4 5 mm 5x 177 in m Ne sre Q A e i 55 88 mm o 2 200 in l 183 79 7 236 in Dx Y WELLE ere a 9 53 34 mm 2 100 in T Y Pede XM ATA ee M J 13 97 gt 0 550 in i i 25 40 rin 25 40 mm 1 000 in lt gt 1 000 in Figure 6 NI WSN 3214 Device Panel Mount Dimensions NI WSN 3214 User Guide and Specifications 8 ni com 1 Retention Knob 4 Integrated Mounting Pin 2 Retention Clip 5 Power and I O Strain Relief 3 Mounting Hole Figure 7 Panel Mount Accessory Refer to Figure 7 while completing the following steps to mount the NI WSN 3214 on a panel 1 NI WSN 3280 Bolt or screw the panel mount accessory to a panel using five 8 32 or M4 screws NI WSN 3281 Attach the panel mount accessory using the integrated magnet 2 Slide the NI WSN 3214 device into the panel mount
11. Waveform Sample Period 1 Waveform Sample Rate Radio Send Data se UT Radio time slot where waveform data is sent Figure 34 NI WSN Waveform Acquisition Timing The following graphs demonstrate estimated battery life under common conditions Channel 2 Channels 8 Channels dreas 4 Channels Battery Life Years M l T T T T T 0 100 200 300 400 500 600 Waveform Interval Seconds Test Conditions NI WSN 1 Sample per Waveform 50 60 Hz High Rejection 350 Full Bridge Figure 35 NI WSN Battery Life Versus Waveform Interval and Number of Channels National Instruments 35 NI WSN 3214 User Guide and Specifications 1 Channel 2 Channels 3 Channels ID 4 Channels Battery Life Years 0 01 T T Waveform Interval Seconds Test Conditions NI WSN 1 Sample per Waveform 50 60 Hz High Rejection 350 Q Full Bridge Figure 36 NI WSN Battery Life Versus Waveform Interval and Number of Channels 1 Channel 2 Channels 8 Channels EIL 4 Channels Battery Life Years Number of Samples per Waveform Test Conditions NI WSN 180 Seconds Waveform Interval 50 60 Hz High Rejection 350 Q Full Bridge Figure 37 NI WSN Battery Life Versus Number of Samples per Waveform NI LabVIEW WS
12. Contact Closure Input voltage range eeeeeeenee 3 3 to 24 VDC maximum National Instruments 48 NI WSN 3214 User Guide and Specifications Digital input logic level thresholds TTL Logic and Contact Closure modes High level ON input voltage 22 V Low level OFF input voltage 50 8 V 24 V modes IEC 61131 2 compatibility Type 1 and 3 High level ON input voltage 210 V High level ON input current 22 mA High level OFF input voltage lt 6 V Low level OFF input current X mA Input current TTL Logic and Contact Closure modes lt 375 uA at 30 V X110 pA at 5 V lt 80 WA at 3 V Contact Closure mode pull up current lt 175 uA through closed contact DA V modes teneret lt 6 4 mA at 30 V 3 2 mA at 15 V Minimum detectable pulse width TTL Logic mode 24 V modes oin eun eei rtr RR REESE Contact Closure mode sss 100 us Digital Output Modes configurable per channel Drive High Sourcing Drive Low Sinking Drive High and Low Sinking and Sourcing and 3V TTL Logic Open Collector with Pull Up DIO power supply voltage range Vpio_pwr 3 3to 24 V Sourcing current one channel 0 25 A maximum Sinking current per channel 1 A maximum Output voltage None
13. E Vpio pwna 750 mV with Iour 0 25 A SMKN 3 etroscteieitee teat he eta 50 mV with Ioyr 1 A 3V TTL Logic mode pull up 22 V with Ioyr 20 HA DO protection Mr 30 VDC maximum Reversed voltages ettet bets None Short circuit sourcing Trip c trent isisiyi ienen 0 26 A minimum 1 2 A maximum TAPINE naa lt 250 us at 1 2 A Overcurrent sinking esses 6 5 A maximum NI WSN 3214 User Guide and Specifications 44 ni com DO propagation delay SNL 250 us SOUFOIIB usce nter READS 2 5 ms Node Resources for LabVIEW WSN Module Minimum sample interval sss 0 5s User flash Size ritmi eee 188 KB User RAM SIZe iecore Edere 2MB Number of flash erase cycles per sector 100 000 Wireless Characteristics Radio 1 O06 4 5 noe unen nn Ue neta IEEE 802 15 4 RE data rate ione eie pee 250 Kbps Range AMETAS uinci i nene ces Up to 300m International Up to 150m Frequency band sss ISM 2 4 GHz 2400 MHz to 2483 5 MHz Channels oeenn erreren eisiea oia 11 24 TX power AMECA edet EOS 17 dBm maximum 50 mW International 10 dBm maximum Modulation type iicet rette DSSS O QPSK Receiver sensitivity eee rm eese 102 dBm Antenna MM Female RP SMA connector 2 0 maximum Impedance rmt rtr 50 Q Directii dC Omni Nominal Sanit gettin Rhe 1 5 dBi
14. You can connect a variety of industrial devices such as solenoids relays and indicators to the NI WSN 3214 device Refer to the Specifications section to ensure compatibility Note You must use 2 wire ferrules to create a secure connection when connecting more than one wire to a single terminal on the NI WSN 3214 Note You can connect only one external DIO PWR supply to the NI WSN 3214 e GG The power supply provides the current for the devices you connect to the NI WSN 3214 Connect the power supply positive lead to DIO PWR terminal and the power supply negative lead to one of the DGND terminals The DIO PWR terminal on the NI WSN 3214 is internally connected to each digital channel Refer to the Specifications section for information about the power supply voltage range yl Note The Drive High Sourcing and Drive High and Low Sinking and Sourcing modes require an external power supply connected to the DIO PWR terminal Drive High Sourcing Drive High Sourcing mode is for devices that require high side drive or a sourcing output When using this mode e Connect the device to DIOx and connect the device common to the DGND terminal corresponding to that DIOx terminal The DIOx terminal is driven to the voltage supplied to DIO PWR when you turn on the channel e Writing a digital value of 1 turns on the channel and 0 turns off the channel e The channel is high impedance when the channel is turned off 0
15. EC Radio and Telecommunications Terminal Equipment R amp TTE Directive NI WSN 3214 User Guide and Specifications 48 ni com Regulatory Information United States This product generates and radiates radio frequency energy To comply with the radio frequency radiation exposure guidelines in an uncontrolled environment this equipment must be installed and operated while maintaining a minimum body to antenna distance of 20 cm This product complies with Part 15 of the FCC Rules Operation is subject to these two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation This product does not contain any user serviceable components Any unauthorized product changes or modifications will invalidate the warranty and all applicable regulatory certifications and approvals Canada This product complies with Industry Canada RSS 210 Cet appareil est conforme aux norme RSS210 d Industrie Canada Europe EU Declaration of Conformity C Marking by the above CE symbol on the label indicates compliance with the Essential Requirements of the R amp TTE Directive of the European Union 1999 5 EC This equipment meets the following conformance standards EN 300 893 EN 300 328 EN 301 489 17 EN 60950 Europe Restrictions for Use of 2 4 GHz Frequencies in European Community Countries Belgi For private usage
16. Logic input thresholds e A supply voltage is not required on DIO PWR 3V i TTL i Pull Up i DI DIOx External Int 1 TTL Device Power nterna Low Side pply Switch PRONE INIWSN 3214 NZ Figure 32 Connecting a Device to the NI WSN 3214 in 3V TTL Logic Mode Drive High and Low Sinking and Sourcing When using Drive High and Low Sinking and Sourcing mode e Connect the device to DIOx and connect the device common to the DGND terminal corresponding to that DIOx terminal TheDIOx terminal is driven to the voltage supplied to DIO PWR when you turn on the channel and is driven to DGND when you turn off the channel NI WSN 3214 User Guide and Specifications 32 ni com e fasupply voltage is not connected to DIO PWR it operates as if it is set to the Drive Low Sinking mode e Writing a digital value of 1 turns on the channel and writing a 0 turns the channel off DIO PWR High Side Switch P External i DI o o DIOx Power 9 Internal Supply Low Side Switch DGND NI WSN 3214 Figure 33 Connecting a Device to the NI WSN 3214 in Drive High and Low Mode Connecting Digital Inputs You can connect a variety of sensors switches and industrial devices to the NI WSN 3214 device Refer to the Specifications section to ensure compatibility 24 V Sinking In 24 V Sinking mode the DIOx terminal has a low imped
17. NI WSN 3214 are reserved for future use by National Instruments Specifications These specifications are typical from 40 to 70 C and assume high rejection strength mode and 50 60 Hz filter rejection mode unless otherwise noted Some specifications such as sample interval and power consumption can be optimized by customizing node behavior with the NI LabVIEW Wireless Sensor Network WSN Module Pioneer Refer to the LabVIEW WSN Performance Benchmarks documents at zone ni com for more information For the NI WSN gateway specifications refer to the gateway documentation UN Caution Electromagnetic interference can adversely affect the measurement accuracy of this product The analog input terminals of this device are not protected for electromagnetic interference As a result this device may experience reduced measurement accuracy or other temporary performance degradation when connected cables are routed in an environment with radiated or conducted radio frequency electromagnetic interference To limit radiated emissions and to ensure that this device functions within specifications in its operational electromagnetic environment take precautions when designing selecting and installing measurement probes and cables NI WSN 3214 User Guide and Specifications 40 ni com Analog Input Characteristics Number of channels esses 4 analog input channels Sampling mode eee Scanned ADC resolution
18. OET65 This product generates and radiates radio frequency energy To comply with the radio frequency radiation exposure guidelines in an uncontrolled environment this equipment should be installed and operated with at least 20 cm between the radiator and the person s body excluding extremities hands wrists feet and legs This equipment complies with the European Council Recommendation 1995 519 EC on the limitation of exposure of the general public to electromagnetic fields Compliance was determined in accordance with the requirements in EN 50371 Environmental Operating temperature IEC 60068 2 1 and IEC 60068 2 2 40 to 70 C Storage temperature IEC 60068 2 1 and IEC 60068 2 2 40 to 85 C Operating humidity IEC 60068 2 56 10 to 90 RH noncondensing Storage humidity IEC 60068 2 56 5 to 95 RH noncondensing Pollution Degree IEC 60664 2 National Instruments 47 NI WSN 3214 User Guide and Specifications Maximum altitude ssssseesseeeeee 2 000 m Indoor use only Shock and Vibration Operating vibration random IEC 60068 2 64 5 gins 10 to 500 Hz Operating shock IEC 60068 2 27 30 g 11 ms half sine 50 g 3 ms half sine 18 shocks at 6 orientations Operating vibration sinusoidal IEC 60068 2 6 sss 5 g 10 to 500 Hz Electrom
19. Sensitivity 1 0 n V V per pe for GF 2 0 v 0 Figure 24 Full Bridge Type III Circuit Diagram The following symbols apply to the circuit diagram and equations R Active element measuring compressive Poisson effect v R Active element measuring tensile strain R Active element measuring compressive Poisson effect v R4 Active element measuring the tensile strain GF Gage Factor specified by the gage manufacturer v Poisson s ratio defined as the negative ratio of transverse strain to axial strain longitudinal strain Poisson s ratio is a material property of the specimen you are measuring Vcg Measured voltage of the bridge Vgx Excitation voltage provided by the NI WSN 3214 V Offset compensated ratiometric bridge output defined by the following equation r V V y d x Shunt Calibration Offset Null EX NI WSN 3214 User Guide and Specifications 25 ni com Note The ratio of the bridge output voltage to the excitation voltage is calculated internally on the S NI WSN 3214 Shunt Calibration is only supported for quarter bridge If you are switching from using a quarter bridge to a half bridge or a full bridge configuration you need to specify 1 for Shunt Calibration and then perform Offset Null in the software The NI WSN 3214 converts the readings to strain using the following equation 2V r strain GF v D V v 1 A
20. ZYMMOPOONETAI NPOX TIX OYZIOAEIZ ANAITHZEIZ KAI TIZ AOINES ZXETIKEZ AIATA EI2 TH OAHMIAZ 1999 5 EK rangais ar la pr sente National Instruments d clare que l apparei est conforme F i Par Ssente National Inst ts d cl I il NI WSN 3214 est conf renci aux exigences essentielles et aux autres dispositions pertinentes de la directive D oF h i tiell t tres di iti rtinentes de la directi 1999 5 CE aliano on la presente National Instruments dichiara che questo conforme ai Itali Con la p te National Inst ts dichi he questo NI WSN 3214 fi i 1 Italian requisiti essenziali ed alle altre disposizioni pertinenti stabilite dalla direttiva 1999 5 CE atviski r o National Instruments deklar ka atbilst Direktivas Latviski Ar o National Inst ts dekl ka NI WSN 3214 atbilst Direkt 1999 5 EK atvian tiskajam prasibam un citiem ar to saistitajiem noteikumiem Latvi b tiskaj b iti t istitaji teikumi Lietuviu Siuo National Instruments deklaruoja kad Sis NI WSN 3214 atitinka esminius reikalavimus E Lithuanian ir kitas 1999 5 EB Direktyvos nuostatas Nederlands Hierbij verklaart National Instruments dat het toestel NI WSN 3214 in overeenstemming is ul Dutch met de essenti le eisen en de andere relevante bepalingen van richtlijn 1999 5 EG Malti Hawnhekk National Instruments jiddikjara li dan NI WSN 3214 jikkonforma mal htigijiet Maltese essenzjali u ma provvedimenti ohrajn relevanti
21. cabling such as the 36 terminal detachable screw terminal connector Attaching the NI WSN 3282 DIN Rail Optional You can mount the NI WSN 3214 on a standard 35 mm DIN rail using a NI WSN 3282 DIN rail clip NI part number 781074 01 Complete the following steps to mount the NI WSN 3214 on a DIN rail UN Caution Power off the device before mounting it to the DIN rail iyi Note Use thread forming screws to permanently affix the DIN rail clip to the device Unscrewing and reinstalling the thread forming screws produces a compromised connection between the DIN rail clip and the device 1 Fasten the DIN rail clip to the NI WSN 3214 using a number 2 Phillips screwdriver and the four 8 32 x 5 16 in thread forming screws that shipped with the DIN rail clip s Figure 4 shows how to fasten the DIN rail clip to the NI WSN 3214 UN Caution Do not use screws longer than 5 16 in to fasten the DIN rail clip to the NI WSN 3214 NI WSN 3214 User Guide and Specifications 6 ni com Figure 4 NI WSN 3214 Device DIN Rail Installation 2 Insert one edge of the DIN rail into the deeper opening of the DIN rail clip as shown in Figure 5 1 DIN Rail Clip Without Device 2 DIN Rail Figure 5 DIN Rail Clip Installation 3 Press down firmly on the NI WSN 3214 to compress the spring until the clip locks into place on the DIN rail National Instruments 7 NI WSN 3214 User Guide and Specifications
22. circuit protection turn off the high side switch by writing a digital value of 0 to the channel Then check the wiring and remove any possible faults The correct functionality of the circuit should be confirmed by writing a digital value 1 to the channel and then reading a logical 1 from it Battery Considerations NI WSN 3214 power consumption is different depending on whether or not you are using NI WSN or NI LabVIEW WSN NI WSN If you are using NI WSN you have control of the data using the following settings waveform interval sample rate number of samples per waveform acquisition mode or bridge type At each waveform interval the NI WSN 3214 transmits the acquired data to the gateway The size of the acquired data varies along with the number of channels being measured and with the number of samples per waveform For each channel that is being measured a certain radio communication protocol is repeated meaning that the power required by the radio is directly proportional to the number of channels that are being measured As more samples per waveform are acquired these are split into packages when sent which increases the amount of power required to send them The following timing diagram shows how the NI WSN 3214 acquires and sends data using NI WSN NI WSN 3214 User Guide and Specifications 34 ni com Samples per Waveform Waveform Interval i gt Acquisition MI IE xs IE IE IE m IE
23. for the half bridge strain gage configuration type I The half bridge type I measures either axial or bending strain Figure 15 shows how to position strain gage resistors in an axial and bending configurations Figure 16 shows the half bridge type I circuit wiring diagram Figure 15 Half Bridge Type Measuring Axial and Bending Strain A half bridge type I has the following characteristics Two active strain gage elements One strain gage element is mounted in the direction of axial strain while the other acts as a Poisson gage and is mounted perpendicular to the principal axis of strain e Half bridge completion resistors R and R5 are provided by the NI WSN 3214 e Sensitive to both axial and bending strain e Sensitivity 0 5 uV V per pe for GF 2 0 v 0 NI WSN 3214 User Guide and Specifications 18 ni com M Vou _ rs EX gt J alse o D Vex Rave i o RS 7 Figure 16 Half Bridge Type Circuit Diagram The following symbols apply to the circuit diagram and equations R and R Half bridge completion resistors located inside the NI WSN 3214 R Active element measuring compression from Poisson effect ve R4 Active element measuring tensile strain GF Gage Factor specified by the gage manufacturer v Poisson s ratio defined as the negative ratio of transverse strain to axial strain longitudinal strain Poiss
24. ground yourself and the equipment when handling or connecting to the device 1 Loosen the battery compartment retention screw and remove the compartment cover as shown in Figure 10 1 Battery Retention Screw Figure 10 NI WSN 3214 Battery Compartment UN Caution Using the incorrect battery type creates an explosion risk Do not use rechargeable batteries Refer to the Battery Replacement and Disposal section for information about how to dispose of used batteries B Note When using the NI WSN 3214 device on battery power you should configure the device as an end node so that it sleeps most of the time Running a device configured in router mode from battery power greatly reduces the battery life The device ships from the factory configured as an end node For more information about how to switch the node from an end node to router mode refer to Configuring WSN in MAX available from Start All Programs National Instruments NI WSN 2 Install four AA alkaline or lithium batteries in the device making sure to install them with the correct polarity Figure 12 shows the battery polarity markings inside the device battery compartment 3 Reinstall the battery compartment cover and tighten the retention screw NI WSN 3214 User Guide and Specifications 12 ni com Connecting External Power to the NI WSN 3214 Device UN Caution To ensure the specified EMC performance do not connect the power input to a DC mains supply or
25. mW at 12 V 5 second sample interval 40 mW at 12 V Router mode sesinin 200 mW at 12 V Physical Characteristics Screw terminal wiring eere 14 to 24 AWG wire Torque for screw terminals sssss 0 2 to 0 25 N m DIMENSIONS esi tiser E rA EEEa eee ensi TERESE Refer to Figure 2 for device dimensions Sru Approx 242 g 8 5 oz Weight with antenna eee Approx 256 g 9 oz Calibration You can obtain the calibration certificate and information about calibration services for the NI WSN 3214 at ni com calibration Calibration interval eese 3 years Safety Standards UN Caution Do not operate the NI WSN 3214 in a manner not specified in this user guide Product misuse can result in a hazard You can compromise the safety protection built into the product if the product is damaged in any way If the product is damaged return it to National Instruments for repair Device executing NI WSN firmware Device executing NI WSN firmware 4 channels 10 S waveform 50 60 Hz high rejection 3 Router connected directly to a NI WSN gateway 1 second sample interval NI WSN 3214 User Guide and Specifications 46 ni com The NI WSN 3214 is designed to meet the requirements of the following standards of safety for electrical equipment for measurement control and laboratory use e TEC 61010 1 EN 61010 1 e UL
26. ni com info and enter rdwsnrd In addition to this guide the following documents may be useful when configuring your NI WSN system The getting started guide for your NI WSN gateway s The user guide and specifications for your NI WSN node s Configuring WSN in MAX available from Start All Programs National Instruments NI WSN LabVIEW Help for WSN Devices available in LabVIEW from Help LV Help WSN Devices Help NI WSN Readme available on the software installation disc included with your gateway Training Courses If you need more help getting started developing an application with NI products NI offers training courses To enroll in a course or obtain a detailed course outline refer to ni com training Technical Support on the Web For additional support refer to ni com support or zone ni com NI WSN 3214 User Guide and Specifications 4 ni com Software Overview 3 Note Refer to the NI WSN Readme available on the software installation disc included with your gateway or at ni com drivers for NI software application version support The NI WSN software is supported by Windows 7 Vista XP and contains the following components NI Measurement amp Automation Explorer MAX e NI WSN NI WSN software and NI MAX manage the hardware configurations and simplify programmatic access to I O channels The NI WSN software is downloadable from ni com drivers and on the software installation disc included with your
27. outside buildings across public grounds over less than 300m no special registration Belgique with IBPT BIPT is required Registration to IBPT BIPT is required for private usage outside buildings across public grounds over more than 300m For registration and license please contact IBPT BIPT Voor priv gebruik buiten gebouw over publieke groud over afstand kleiner dan 300m geen registratie bij BIPT IBPT nodig voor gebruik over afstand groter dan 300m is wel registratie bij BIPT IBPT nodig Voor registratie of licentie kunt u contact opnemen met BIPT Dans le cas d une utilisation priv e l ext rieur d un b timent au dessus d un espace public aucun enregistrement n est n cessaire pour une distance de moins de 300m Pour une distance sup rieure 300m un enregistrement aupr s de I IBPT est requise Pour les enregistrements et licences veuillez contacter l IBPT Deutschland License required for outdoor installations Check with reseller for procedure to follow Anmeldung im Outdoor Bereich notwendig aber nicht genehmigungspflichtig Bitte mit Handler die Vorgehensweise abstimmen France Restricted frequency band only channels 1 to 7 2400 MHz and 2454 MHz respectively may be used outdoors in France Check with the Telecommunications and Postal Regulation Authority http www arcep fr for procedure to follow Bande de fr quence restreinte seuls les canaux 1 7 2400 et 2454 MHz respectivement doiven
28. quarter bridge only Offset Nulling For each new installed bridge sensor the bridge does not output exactly 0 mV V when not under load Slight variations in resistance among the bridges legs generate some nonzero initial offset voltage To apply software compensation for the bridge perform an offset nulling calibration The NI WSN 3214 measures the bridge while not under load and then uses this measurement as the initial bridge voltage when scaling readings from the bridge This method is simple fast and requires no manual adjustments The disadvantage of the software compensation method in contrast to hardware compensation is that software compensation does not physically remove the offset of the bridge If the offset is large enough it limits the amplifier gain you can apply to the output voltage thus limiting the dynamic range of the measurement Noise Considerations Using the NI WSN 3214 in noisy environments creates additional noise in the measurements One common scenario is to observe the 50 Hz or 60 Hz noise in the spectrum of your measurement This can be caused by a nearby device that is supplied from the mains The WSN 3214 is capable of filtering the 50 Hz and 60 Hz in this situation by selecting the filter acquisition modes in NI WSN or in NI LabVIEW WSN National Instruments recommends using shielded cabling to lessen the susceptibility to noise For full half bridge measurements use a shielded twisted pair cable Pair EX
29. ratio of the bridge output voltage to the excitation voltage is calculated internally on the NI WSN 3214 Shunt Calibration is only supported for quarter bridge If you are switching from using a quarter bridge to a half bridge or full bridge configuration you need to specify 1 for Shunt Calibration and then perform Offset Null in the software The NI WSN 3214 converts the readings to strain using the following equation 2V r strain GFO v Full Bridge Type IlI This section provides information for the full bridge strain gage configuration type III The full bridge type III only measures axial strain Figure 23 shows how to position strain gage resistors in an axial configuration Figure 24 shows the full bridge type III circuit wiring diagram Measures Axial i Rejects Bending Figure 23 Full Bridge Type IIl Measuring Axial and Rejecting Bending Strain NI WSN 3214 User Guide and Specifications 24 ni com A full bridge type III configuration has the following characteristics Four active strain gage elements Two strain gage elements are mounted in the direction of axial strain with one on one side of the strain specimen top while the other is on the opposite side bottom The other two act together as a Poisson gage and are mounted transverse perpendicular to the principal axis of strain with one on one side of the strain specimen top and the other on the opposite side bottom Rejects bending strain
30. specify 1 for Shunt Calibration and then perform Offset Null in the software The NI WSN 3214 converts the readings to strain using the following equation r train strain GF Full Bridge Type This section provides information for the full bridge strain gage configuration type I The full bridge type Lonly measures bending strain Figure 19 shows how to position strain gage resistors in a bending configuration Figure 20 shows the full bridge type I circuit wiring diagram Rejects Axial Measures Bending Figure 19 Full Bridge Type Rejecting Axial and Measuring Bending Strain A full bridge type I configuration has the following characteristics e Four active strain gage elements Two strain gage elements are mounted in the direction of bending strain on one side of the strain specimen top while the other two are mounted in the direction of bending strain on the opposite side bottom Highly sensitive to bending strain e Rejects axial strain e Sensitivity 2 u V V per ue for GF 2 0 National Instruments 21 NI WSN 3214 User Guide and Specifications Vex Pate Roomp EX RS Figure 20 Full Bridge Type Circuit Diagram The following symbols apply to the circuit diagram and equations R Active element measuring compressive strain R Active element measuring tensile strain R5 Active element measuring compressive strain
31. switched off Caution Substitution of components may impair suitability for Class I Division 2 gt ee EE Caution For Zone 2 applications install the WSN system in an enclosure rated to at least IP 54 as defined by IEC 60529 and EN 60529 Special Conditions for Hazardous Locations Use in Europe The NI WSN 3214 has been evaluated as Ex nA nL IIC T4 equipment under DEMKO Certificate No 07 ATEX 0626664X Each module is marked II 3G and is suitable for use in Zone 2 hazardous locations in ambient temperatures of 40 C lt Ta lt 70 C Electromagnetic Compatibility Guidelines This product was tested and complies with the regulatory requirements and limits for electromagnetic compatibility EMC as stated in the product specifications These requirements and limits are designed to provide reasonable protection against harmful interference when the product is operated in its intended operational electromagnetic environment National Instruments 3 NI WSN 3214 User Guide and Specifications This product is intended for use in industrial locations There is no guarantee that harmful interference will not occur in a particular installation when the product is connected to a test object or if the product is used in residential areas To minimize the potential for the product to cause interference to radio and television reception or to experience unacceptable performance degradation install and use this product in strict accor
32. to any supply requiring a connecting cable longer than 30 m 100 ft A DC mains supply is a local DC electricity supply network in the infrastructure of a certain site or building To connect an external power supply to the NI WSN 3214 complete the following steps 1 Remove the 2 position mini combicon plug from the device Loosen the retaining screws if necessary Figure 11 2 Position Mini Combicon Plug 2 Connect the external power supply positive lead to the V terminal Connect the negative common lead to the C terminal 4 Reinstall the 2 position mini combicon plug in the device and tighten the retaining screws IN Caution You must use a UL Listed ITE power supply marked LPS with the NI WSN 3214 The power supply must also meet any safety and compliance requirements for the country of use National Instruments 13 NI WSN 3214 User Guide and Specifications Device Interface Figure 12 shows the NI WSN 3214 device interface LID RESET HR briifiIiiiiiiiiiiii 6 1 Antenna 6 O Connector 2 WSN Connect Button 7 Reset Button 3 Signal Strength Status LEDs 8 Pro2 Port Reserved for Future Use 4 User LED 9 5 30 V External Power Input 5 Battery Slots Polarity Indicat
33. 512 795 8248 For telephone support outside the United States visit the Worldwide Offices section of ni com niglobal to access the branch office Web sites which provide up to date contact information support phone numbers email addresses and current events LabVIEW National Instruments NI ni com the National Instruments corporate logo and the Eagle logo are trademarks of National Instruments Corporation Refer to the Trademark Information at ni com trademarks for other National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies For patents covering National Instruments products technology refer to the appropriate location Help Patents in your software the patents txt file on your media or the National Instruments Patent Notice at ni com patents Refer to the Export Compliance Information at ni com legal export compliance for the National Instruments global trade compliance policy and how to obtain relevant HTS codes ECCNs and other import export data 2012 National Instruments All rights reserved 373304A 01 Sep12
34. 61010 1 CSA 61010 1 3 Note For UL and other safety certifications refer to the product label or go to ni com certification search by model number or product line and click the appropriate link in the Certification column Hazardous Locations WS CU Li ess eee Class I Division 2 Groups A B C D T4 Class I Zone 2 AEx nC IIC T4 Canada GUL c cien oiii eate Class I Division 2 Groups A B C D T4 Class I Zone 2 Ex nL IIC TA Europe DEMRKO eene Ex nA nL IIC T4 Safety Voltages Connect only voltages that are within these limits V terminal to C terminal sess 30 V maximum Measurement Category I Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage MAINS is a hazardous live electrical supply system that powers equipment This category is for measurements of voltages from specially protected secondary circuits Such voltage measurements include signal levels special equipment limited energy parts of equipment circuits powered by regulated low voltage sources and electronics Caution Do not connect the system to signals or use for measurements within Measurement Categories II MI or IV RF Safety Warning This equipment complies with FCC radiation exposure limits set for uncontrolled equipment and meets the FCC radio frequency RF Exposure Guidelines in Supplement C to
35. Battery Replacement and Disposal Battery Directive After replacement recycle the old battery For information about the available collection and recycling scheme and your nearest National Instruments Branch Office or on Battery Directive compliance Directive 2006 66 EC of the European Parliament and Council in a particular EU country visit ni com company citizenship product htmfbattery Taiwan R 0 C 1 bs FEE oos e C Cd Hg Pb mem mR Sie AE ROHS QL PAA National Instruments 5 74 Edit TAA EP eb b Ee ae TE RoHS XT National Instruments FE RoHS AHE Ea WSK ni com environment rohs china For information about China RoHS compliance go to ni com environment rohs china NI WSN 3214 User Guide and Specifications 52 ni com Where to Go for Support The National Instruments Web site is your complete resource for technical support At ni com support you have access to everything from troubleshooting and application development self help resources to email and phone assistance from NI Application Engineers National Instruments corporate headquarters is located at 11500 North Mopac Expressway Austin Texas 78759 3504 National Instruments also has offices located around the world to help address your support needs For telephone support in the United States create your service request at ni com support and follow the calling instructions or dial
36. N If you are using NI LabVIEW WSN the expected battery life of your NI WSN 3214 can vary greatly based on your NI LabVIEW WSN program waveform interval waveform sample rate number of samples per waveform acquisition mode or bridge type Given a small number of samples per waveform the largest contributor to the power consumption is the radio communication NI LabVIEW WSN allows you to select the amount of data that you send over the radio and when to send it increasing the expected NI WSN 3214 User Guide and Specifications 36 ni com battery life You can select to send Waveforms or User Defined I O Variables UDV One example of an application where you can extent the battery life of your NI WSN 3214 is when you take measurements but you choose to send only the average or the minimum and maximum of the acquired data as UDVs The following timing diagram shows how the NI WSN 3214 acquires and sends data using NI LabVIEW WSN Samples per Waveform 1 me Waveform Interval 0c Acquisition ULI LU sais IE HUE LUE sis HE gt lt Waveform Sample Period 1 Waveform Sample Rate v Radio Send Di DA T E Data 64 un iis i E diis X mm i i Radio time slot where Radio time slot where optionally Time Interval gt waveform data or UDVs DE waveform data is not sent are sent Figure 38 NI LabVIEW WSN Waveform Acquisition Timing The following graphs demonstrate estimated battery life under common conditions
37. NI WSN gateway You can download a current version of NI WSN software from ni com support Using your Web browser go to ni com support and select Drivers and Updates Distributed I O Wireless Sensor Networks and then select the latest version of NI WSN software If you are using other software refer to the accompanying installation instructions What You Need to Get Started To set up and use NI LabVIEW with the NI WSN 3214 device you need the following e NIWSN gateway e NIWSN 3214 device s with a 5 30 V power supply or four alkaline or lithium AA 1 5 V batteries for each node Refer to the Battery Power section for recommended battery types Mounting hardware DIN rail or panel panel mount Ethernet cable connection 1 8 in flathead and number 2 Phillips screwdrivers e NI WSN 1 3 1 or later Host PC running Windows 7 Vista XP e NILabVIEW 2011 32 bit or later e NI LabVIEW 2011 WSN Module or later optional NI 9792 WSN Real Time Gateway Only NI LabVIEW 32 bit Real Time Module or later NI 9795 WSN C Series Gateway Only NI RIO 4 0 or later and NI LabVIEW 32 bit Real Time Module Related hardware and software documentation For more information about NI WSN software versions go to ni com info and enter wsnsoftware Unpack the Device and Install the Antenna AN AN AN Remove the device from the package and inspect the device Contact NI if the device appears damaged Do not insta
38. accessory as shown in Figure 7 Slide the retention clip down and tighten the panel mount knob to secure the NI WSN 3214 device as shown in Figure 8 4 Optional Secure any I O signal or power supply cabling to the panel mount accessory using a zip tie and the integrated strain relief slots National Instruments 9 NI WSN 3214 User Guide and Specifications Oo Oo NATIONAL NATIONAL Nis raUMENTS instruments Figure 8 Slide Retention Clip Down and Tighten Panel Mount Knob Using the Integrated Panel Mount Slots You can also mount the NI WSN 3214 to a panel using the integrated panel mount slots as shown in Figure 9 1 Attach three number 8 or M4 pan head screws in the mounting panel leaving 0 1 in space under the head of each screw Refer to Figure 2 for the correct hole pattern and dimensions 2 Slide the NI WSN 3214 device onto the panel Note In this configuration the NI WSN 3214 is held in place only by the weight of the device and the friction of the screw attachment Use the DIN rail clip or panel mount accessories in high vibration environments NI WSN 3214 User Guide and Specifications 10 ni com Figure 9 Integrated Panel Mount Slots UN Caution Disconnect power before removing the device from the panel Setting Up the NI WSN 3214 Device The following sections discuss setting up the NI WSN 3214 for use Installing the Software For more information about NI WSN sof
39. agnetic Compatibility This product is designed to meet the requirements of the following standards of EMC for electrical equipment for measurement control and laboratory use EN 61326 2 IEC 61326 2 Class A emissions Basic immunity EN 55011 CISPR 11 Group 1 Class A emissions AS NZS CISPR 11 Group 1 Class A emissions FCC 47 CFR Part 15B Class A emissions ICES 001 Class A emissions The NI WSN 3214 also meets the requirements of the following EMC standards for intentional radiators Ej 3 EN 300 328 EN 301 489 1 and EN 301 489 17 FCC 47 CFR Part 15C IC RSS 210 Note In the United States per FCC 47 CFR Class A equipment is intended for use in commercial light industrial and heavy industrial locations In Europe Canada Australia and New Zealand per CISPR 11 Class A equipment is intended for use only in heavy industrial locations Note Group 1 equipment per CISPR 11 is any industrial scientific or medical equipment that does not intentionally generates radio frequency energy for the treatment of material or inspection analysis purposes Note For EMC certification and additional information refer to the product label or the Online Product Certification section CE Compliance C This product meets the essential requirements of applicable European Directives as amended for CE marking as follows 2006 95 EC Low Voltage Directive safety 2004 108 EC Electromagnetic Compatibility EMC Directive 1999 5
40. ance to ground and input thresholds compatible with 24 V signaling Select this mode for connection to industrial 24 V IEC1131 sourcing output devices 24 V Sinking with Power Management In 24 V Sinking with Power Management mode the DIOx terminal is similar to 24 V Sinking mode but the low impedance path to ground is removed when the inputs are not being actively read This can reduce the power consumption of the output device This mode should only be used with output devices that have valid output states within 100 Lis of having a low impedance path presented to the output TTL Logic TTL Logic mode is suitable for most 3 V or 5 V logic signals The DIOx terminal has high impedance inputs with TTL Logic compatible thresholds Contact Closure Contact Closure mode is suitable for connections to contact switches wired between the input and ground The DIOx terminal has TTL Logic compatible thresholds and provides a pull up resistor to 3 V when the input is being read If a contact to ground remains closed while the DIO Notification property is enabled the current into the contact switch increases power consumption and can reduce battery life Digital 1 0 Protection The high side switch on each I O channel has short circuit protection The low side switch on each I O channel is oversized to be able to withstand higher currents than when in normal operating conditions National Instruments 33 NI WSN 3214 User Guide and Specifications Und
41. dance with the instructions in the product documentation Furthermore any changes or modifications to the product not expressly approved by National Instruments could void your authority to operate it under your local regulatory rules The following statements contain important EMC information needed before installing and using this product Caution To ensure the specified EMC performance product installation requires either special considerations or user installed add on devices See the product installation instructions for further information Caution To ensure the specified EMC performance operate this product only with shielded cables and accessories Caution To ensure the specified EMC performance operate this product with a DGND terminal on the I O connector tied to earth ground or use the NI recommended external power supply NI part number 780703 01 or equivalent Caution The inputs outputs of this product can be damaged if subjected to Electrostatic Discharge ESD To prevent damage industry standard ESD prevention measures must be employed during installation maintenance and operation gt be P This product may become more sensitive to electromagnetic disturbances in the operational environment when test leads are attached or when connected to a test object Related Documentation Check ni com manuals for the most recent documentation For a complete list of documentation related to the NI WSN system refer to
42. e 2 Pollution is foreign matter in a solid liquid or gaseous state that can reduce dielectric strength or surface resistivity Pp Caution You must insulate signal connections for the maximum voltage for which the NI WSN product is rated Do not exceed the maximum ratings for the product Do not install wiring while the product is live with electrical signals Do not remove or add connector blocks when power is connected to the NI WSN system Avoid contact between your body and the connector block signal wiring when hot swapping devices gt Caution To comply with safety regulations use only recommended batteries with this product Refer to the Battery Power section for the recommended battery types Safety Guidelines for Hazardous Locations The NI WSN 3214 is suitable for use in Class I Division 2 Groups A B C D T4 hazardous locations Class I Zone 2 AEx nC IIC T4 and Ex nL IIC T4 hazardous locations and nonhazardous locations only Follow these guidelines if you are installing the NI WSN 3214 in a potentially explosive environment Not following these guidelines may result in serious injury or death Caution Observe the battery manufacturers operating temperature ratings listed in the Battery operating temperature range specification section Caution Do not disconnect the power supply wires and connectors from the device unless power has been switched off Caution Do not install or remove the device unless power has been
43. ect button as shown in Figure 12 The button controls network connection and the LEDs which display connection status Pressing the WSN connect button results in the device responses shown in Table 2 Table 2 WSN Connect State Device Status Current Device State Duration of Button Press Result Initial power on Any duration Node turns on and searches for an available network not connected Connected to a 5 seconds Node blinks all four signal strength LEDs twice and NI WSN gateway then displays the signal strength as shown in Table 1 25 seconds Node leaves current network and searches for a new network Reset Button The NI WSN 3214 is equipped with a reset button as shown in Figure 12 Pressing the reset button results in the following device responses When pressed for fewer than 5 seconds the device reboots with the current configuration When pressed for 5 seconds or more the device reboots into Factory Default Mode which returns the device user configuration to the factory set defaults Using the NI WSN 3214 Device AN 3 Caution To ensure the specified EMC performance operate this product only with shielded cables and accessories Cable shields must be connected to one of the DGND pins of the I O connector Note When you insert or remove a new sensor from the NI WSN 3214 slight changes in the excitation voltages can cause a mismatch between the internal half bridge comp
44. erstanding Short Circuit Protection The current that flows through the high side switch is continuously sensed If a current above the trip limit is detected the current protection trips and turns off the high side switch The protection latches in the tripped state and only resets when the high side switch is given the command to turn off High inrush currents that exist for a short time do not trip the short circuit protection Refer to the Specifications section for more information about the maximum continuous output current short circuit behavior and short circuit trip time Preventing an Overcurrent Condition Follow these recommendations to prevent an overcurrent condition Donotconnect DIO PWR to ground Do not ground unused terminals Donot exceed the output current rating of the channel Do not exceed the voltage ratings of the channel Detecting an Overcurrent Condition To check whether or not the short circuit protection is tripped the logic state of the DIO pin can be read when driving high using the digital input function If DO is set to Drive High Sourcing or Drive High and Low Sinking and Sourcing modes and a digital value of 1 is written to the channel a logical 1 should be read from the channel If a logical 0 is read instead then the current protection is tripped or a fault is preventing the high side switch from driving the output high Resetting Channels After an Overcurrent Condition To reset the short
45. form 50 60 Hz High Rejection 4 Channels Figure 41 NI LabVIEW WSN Battery Life Versus Time Interval and Bridge Type NI WSN 3214 User Guide and Specifications 38 ni com 3 4CH250us Aperture Time 4CH21 5ms Aperture Time 4CH 50Hz Low Power esos 4CH 50 60Hz High Rejection Battery Life Years amp 42 Lu ue Ll eR 0 5 0 T T T T T 0 100 200 300 400 500 600 Time Interval Seconds Test Conditions NI LabVIEW WSN Module 10 Samples per Waveform 4 Channels 350 Q Full Bridge 10 Waveforms Acquired 1 Waveform Sent Over Radio for a Sampling Interval Figure 42 NI LabVIEW WSN Battery Life Versus Time Interval and Acquisition Mode for Multiple Waveform Acquisitions National Instruments 39 NI WSN 3214 User Guide and Specifications NI WSN 3214 Device Pinout 19 RSO 20 EX0 21 AlO 22 Alo 23 RCOMP EXO e4 Rso 25 TEDSO RS1 EX1 Alt AS J ae RCOMP EX1 5 8 RS1 lel a6 TEDS1 7 6 DGND s 26 DGND RS3 9 a 1 27 RS2 EX3 le e 28 Ex2 Al3 112 a H 29 Al2 Al3 te 30 a2 RCOMP EX3 13 a H 31 RCOMP EX2 RS3 4 e s2 Rs2 33 TEDS2 34 DGND 35 DIOO 36 DIO PWR TEDS3 15 DGND he DIO1 aa DGND Figure 43 NI WSN 3214 Pinout TEDS Channels The TEDS channels on the
46. igh Rejection NI WSN 3214 User Guide and Specifications 42 ni com Table 4 Maximum Sampling Rate and Input Noise Continued 1 Channel 2 Channel 3 Channel 4 Channel Measurement Sampling Sampling Sampling Sampling Total Noise Conditions Rate SPS Rate SPS Rate SPS Rate SPS UL V V cus Filter 60 Hz 30 30 30 30 0 08 High Rejection Filter 27 27 27 27 0 08 50 60 Hz Low Power Filter 13 13 13 13 0 07 50 Hz 60 Hz High Rejection Samples per second Table 5 Normal Mode Rejection Filter Characteristics Filter Strength Filter Rejection High rejection 60 dB at 50 and or 60 Hz 1 Hz Low power 30 dB at 50 and or 60 Hz 1 Hz Excitation Excitation type essere Voltage Voltage terit te ois tree koino 2 V 0 85 maximum Maximum current eeseeseeseeeeeee 6 4 mA Maximum allowable lead resistance per lead wire 350 Q full bridge sees 17 Q 1 KQ full bridge eee 50 Q 350 Q half bridge and quarter bridge 330 1 KQ half bridge and quarter bridge 90 Q Digital 1 0 Number of channels esee 2 Power on output state eene High impedance DIO pin capacitance seen 2 000 pF Digital Input Modes configurable per channel 24 V Sinking 24 V Sinking with Power Management TTL Logic
47. l Instruments erklaerer herved at utstyret NI WSN 3214 er i samsvar med de Norwegian grunnleggende krav og vrige relevante krav i direktiv 1999 5 EF Online Product Certification Refer to the product Declaration of Conformity DoC for additional regulatory compliance information To obtain product certifications and the DoC for this product visit ni com certification search by model number or product line and click the appropriate link in the Certification column National Instruments 51 NI WSN 3214 User Guide and Specifications Environmental Management NI is committed to designing and manufacturing products in an environmentally responsible manner NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers For additional environmental information refer to the NJ and the Environment Web page at ni com environment This page contains the environmental regulations and directives with which NI complies as well as other environmental information not included in this document Waste Electrical and Electronic Equipment WEEE EU Customers At the end of the product life cycle all products must be sent to a WEEE recycling center For more information about WEEE recycling centers National Instruments WEEE initiatives and compliance with WEEE Directive 2002 96 EC on Waste and Electronic Equipment visit ni com environment weee Ix
48. letion resistors and the half bridge sensors which results in a change in the measurement offsets National Instruments recommends performing bridge calibrations of quarter bridge or half bridge sensors after connecting all sensors to the NI WSN 3214 and after removing or attaching any additional sensor Strain Gage Sensor Configurations This section describes the configurations and signal connection of various supported strain gage configuration types Quarter Bridge Type This section provides information for the quarter bridge strain gage configuration type I The quarter bridge type I measures either axial or bending strain Figure 13 shows how to position a strain gage resistor in an axial and bending configuration Figure 14 shows the quarter bridge type I circuit wiring diagram National Instruments 16 NI WSN 3214 User Guide and Specifications Bending Figure 13 Quarter Bridge Type Measuring Axial and Bending Strain A quarter bridge type I configuration has the following characteristics Asingle active strain gage element is mounted in the principal direction of axial or bending strain e A passive quarter bridge completion resistor R4 is required in addition to half bridge completion resistors R and R3 All of these resistors are provided by the NI WSN 3214 module Sensitivity 0 5 V V per pe for GF 2 0 Figure 14 Quarter Bridge Circuit Diagram The following sy
49. li hemm fid Dirrettiva 1999 5 EC hu Magyar Alul rott National Instruments nyilatkozom hogy a NI WSN 3214 megfelel a vonatkoz Hungarian alapvet k vetelm nyeknek s az 1999 5 EC ir nyelv egy b el r sainak Polski Niniejszym National Instruments o wiadcza ze NI WSN 3214 jest zgodny z zasadniczymi E Polish wymogami oraz pozostatymi stosownymi postanowieniami Dyrektywy 1999 5 EC Portugu s National Instruments declara que este NI WSN 3214 esta conforme com os requisitos Portuguese essenciais e outras disposi es da Directiva 1999 5 CE Slovensko National Instruments izjavlja da je ta NI WSN 3214 v skladu z bistvenimi zahtevami in Slovenian ostalimi relevantnimi doloGili direktive 1999 5 ES e Slovensky National Instruments t mto vyhlasuje e NI WSN 3214 sp a z kladn po iadavky a Slovak v etky pr slu n ustanovenia Smernice 1999 5 ES Suomi National Instruments vakuuttaa t ten ett NI WSN 3214 tyyppinen laite on direktiivin Finnish 1999 5 EY oleellisten vaatimusten ja sita koskevien direktiivin muiden ehtojen mukainen Svenska H rmed intygar National Instruments att denna NI WSN 3214 st r verensst mmelse Swedish med de vasentliga egenskapskrav och vriga relevanta bestammelser som framg r av direktiv 1999 5 EG slenska H r me l sir National Instruments yfir pvi a NI WSN 3214 er samr mi vi grunnkr fur Icelandic og a rar kr fur sem ger ar eru i tilskipun 1999 5 EC Norsk Nationa
50. ll a damaged device Caution The device is static sensitive Always properly ground yourself and the equipment when handling or connecting to the device Caution An electrostatic discharge ESD to the antenna connector when the product is operating may cause interference or disruption of the wireless signal To prevent ESD do not attempt to remove the antenna while the product is operating or ensure that you employ industry standard ESD prevention measures Caution The antenna must be attached to the NI WSN device in order for the NI WSN device to function correctly National Instruments 5 NI WSN 3214 User Guide and Specifications To attach the antenna align the antenna with the mount and screw it on as shown in Figure 3 S oio obl NATIONAL INSTRUMENTS Figure 3 Attach the Antenna to the Device Mounting the NI WSN 3214 Device You can mount the NI WSN 3214 on a panel or on a 35 mm DIN rail For kit accessory ordering information refer to the NI WSN product page accessory section at ni com Before using any of these mounting methods remove and save the serial number sticker located on the back of the NI WSN 3214 device for future use when configuring your device in the software For the NI WSN 3214 device dimensions refer to Figure 2 UN Caution Your installation must allow 50 8 mm 2 in of clearance in front of the device for common connector
51. mbols apply to the circuit diagram and equations R and R Half bridge completion resistors located inside the NI WSN 3214 e R3 Quarter bridge completion resistor located inside the NI WSN 3214 You can select to use a bridge completion of 350 Q or 1 KQ Rs must be equal to the nominal resistance of the active gage R4 e R Active element measuring tensile strain You provide this element e GF Gage Factor specified by the gage manufacturer Vgy Excitation voltage provided by the NI WSN 3214 NI WSN 3214 User Guide and Specifications 17 ni com e V Offset compensated ratiometric bridge output defined by the following equation e Vcg Measured voltage of the bridge cH uu y y x Shunt Calibration Offset Null EX 3 Note The ratio of the bridge output voltage to the excitation voltage is calculated internally on the NI WSN 3214 Shunt Calibration is only supported for quarter bridge If you are switching from using a quarter bridge to a half bridge or full bridge configuration you need to specify 1 for Shunt Calibration and then perform Offset Null in the software The NI WSN 3214 converts the readings to strain using the following equation 4y A strain GF 1 2V_ To compensate for lead resistance errors shunt calibration should be used For more information refer to the Shunt Calibration section Half Bridge Type This section provides information
52. nalog Input Circuitry Excitation Voltage The NI WSN 3214 uses a fixed 2 V excitation to supply the bridges This is generated internally from the external power supply or batteries Bridge excitation current is limited to 6 4 mA per channel The excitation current for a single bridge is N 2V R where R is the total resistance of the bridge For a quarter bridge or half bridge R is equal to two times the resistance of each element For a full bridge R is equal to the resistance of each element If you are using a 350 Q full bridge the excitation current is 5 7 mA If you are using a 1 kQ half bridge and quarter bridge the excitation current is 1 1 mA You cannot use 120 Q bridges because they require more than 6 4 mA Refer to the Battery Considerations section for more information about how the battery life changes with the type of bridge used Connection Options to Correct for Resistance Errors Wiring resistance can create gain errors in bridge circuits The NI WSN 3214 provides two mechanisms to correct for these errors remote sensing and shunt calibration The gage and completion resistance tolerances create offset errors The NI WSN 3214 provides offset nulling to correct for this error Remote Sensing Remote sensing continuously and automatically corrects for errors in excitation leads and is only supported for half bridge and full bridge sensors iyi Note The NI WSN 3214 does not support remote sense with quarter bridge sensor
53. ng strain on one side of the strain specimen top while the other is mounted in the direction of bending strain on the opposite side bottom e Half bridge completion resistors R and R5 are provided by the NI WSN 3214 e Sensitive to bending strain e Rejects axial strain Sensitivity 1 0 uV V per pe for GF 2 0 Ale Vou _ mors EX e i Ra e Pi Lo Vex Rate 3 Roomp EX is e o RS EAE A AE NI WSN 3214 Figure 18 Half Bridge Type II Circuit Diagram NI WSN 3214 User Guide and Specifications 20 ni com The following symbols apply to the circuit diagram and equations e R and R Half bridge completion resistors located inside the NI WSN 3214 R Active element measuring compressive strain e R4 Active element measuring tensile strain e GF Gage Factor specified by the gage manufacturer Vcy Measured voltage of the bridge e Vgy Excitation voltage provided by the NI WSN 3214 e V Otfset compensated ratiometric bridge output defined by the following equation r V V y cu x Shunt Calibration Offset Null EX iyi Note The ratio of the bridge output voltage to the excitation voltage is calculated internally on the NI WSN 3214 Shunt Calibration is only supported for quarter bridge If you are switching from using a quarter bridge to a half bridge or full bridge configuration you need to
54. on s ratio is a material property of the specimen you are measuring Vc Measured voltage of the bridge Vgy Excitation voltage provided by the NI WSN 3214 V Offset compensated ratiometric bridge output defined by the following equation V y cn x Shunt Calibration Offset Null ro MEX Note The ratio of the bridge output voltage to the excitation voltage is calculated internally on the NI WSN 3214 Shunt Calibration is only supported for quarter bridge If you are switching from using a quarter bridge to a half bridge or full bridge configuration you need to specify 1 for Shunt Calibration and then perform Offset Null in the software The NI WSN 3214 converts the readings to strain using the following equation 4y f strain GF v 2V v D National Instruments 19 NI WSN 3214 User Guide and Specifications Half Bridge Type Il This section provides information for the half bridge strain gage configuration type II The half bridge type II only measures bending strain Figure 17 shows how to position strain gage resistors in a bending configuration Figure 18 shows the half bridge type II circuit wiring diagram Rejects Axial Measures Bending Figure 17 Half Bridge Type II Rejecting Axial and Measuring Bending Strain A half bridge type II configuration has the following characteristics Two active strain gage elements One strain gage element is mounted in the direction of bendi
55. on one side of the strain specimen top and the other on the opposite side bottom The other two act together as a Poisson gage and are mounted transverse perpendicular to the principal axis of strain with one on one side of the strain specimen top and the other on the opposite side bottom e Rejects axial strain e Sensitivity 1 0 u V V per ue for GF 2 0 v 0 Al V i RS GH _ EX 3 Ie Roomp EX RS pes tates shat NI WSN 3214 Figure 22 Full Bridge Type Il Circuit Diagram National Instruments 28 NI WSN 3214 User Guide and Specifications The following symbols apply to the circuit diagram and equations e R Active element measuring compressive Poisson effect ve e R Active element measuring tensile Poisson effect ve e R lt Active element measuring compressive strain e R Active element measuring tensile strain e GF Gage Factor specified by the gage manufacturer e V Poisson s ratio defined as the negative ratio of transverse strain to axial strain longitudinal strain Poisson s ratio is a material property of the specimen you are measuring Vcy Measured voltage of the bridge Vgy Excitation voltage provided by the NI WSN 3214 e V Offset compensated ratiometric bridge output defined by the following equation V y Dd x Shunt Calibration Offset Null r Wey ik Note The
56. ors Figure 12 NI WSN 3214 Node Interface NI WSN 3214 User Guide and Specifications 14 ni com Signal Strength Status LED Indicators The NI WSN 3214 has four signal strength status LED indicators which flash twice before displaying signal strength information Table 1 shows the status and signal strength LED patterns Table 1 Signal Strength and Status LED State Node Status LED Indication Mode LED State LED Pattern Device Status Signal Strength LED 1 4 OFF Low Signal LEDS 1 4 blink addi twice and then 1234 display the signal strength for three LED 1 ON Poor seconds LED 2 4 OFF al il 1234 LED 1 2 ON Fair LED 3 4 OFF o0 Y 1234 LED 1 3 ON Good LED 4 OFF o0 Bi 1234 LED 1 4 ON al Excellent 1234 Status Indication Each LED 1 4 Searching for a network blinking in OL gt oi succession al 34 o 34 0000 coli 1234 1234 LED 1 4 and 2 3 Updating firmware alternate blinking acl 4 i 1234 1234 LED 1 4 Error Reboot device If problem continuously persists reset device to factory blinking abl abt default settings Go to ni com 1234 1234 support for additional troubleshooting steps National Instruments 15 NI WSN 3214 User Guide and Specifications WSN Connect Button 3 Note Refer to your NI WSN gateway documentation for detailed instructions about how to connect a NI WSN 3214 to the NI WSN gateway The NI WSN 3214 is equipped with a WSN conn
57. s Long wire and small gauge wires have greater resistance which can result in gain error The resistance in the wires that connect the excitation voltage to the bridge causes a voltage drop which is a source of gain error The NI WSN 3214 includes remote sensing to compensate for this gain error Connect remote sense wires to the points where the excitation voltage wires connect to the bridge circuit Figure 25 shows how to connect remote sense wires to the NI WSN 3214 NI WSN 3214 User Guide and Specifications 26 ni com Rbridge R bridge Figure 25 Connecting Remote Sense Wires to the NI WSN 3214 The actual bridge excitation voltage is smaller than the voltage at the EX and EX leads If you do not use remote sensing of the actual bridge voltage the resulting gain error is Read for half bridge sensors and bridge 2 Riead for full bridge sensors bridge If you connect the remote sense signals directly to the bridge resistors the NI WSN 3214 senses the actual bridge voltage and adjusts the excitation voltage to compensate for the gain errors caused by the resistance of the EX and EX leads There is a limit to the amount of resistance that can be compensated for which is 100 mV Excitation current For example if you are using a 350 Q full bridge the amount of resistance that can be compensated for is 100mV _ 172 5 7mA Shunt Calibration Remote sensing correct
58. s for resistances from the EX pins on the NI WSN 3214 to the sensor and shunt calibration corrects for these errors and for errors caused by wire resistance within an arm of the bridge Shunt calibration is most useful with quarter bridge sensors because there may be significant resistance in the wiring to the active resistor in the bridge Refer to Figure 26 for a diagram of this setup The NI WSN 3214 shunt calibration circuitry consists of a precision resistor and a software controlled switch Refer to the software help for information about enabling the shunt calibration switch for the NI WSN 3214 National Instruments 27 NI WSN 3214 User Guide and Specifications EX D Roowp EX R4 8 Figure 26 Shunt Calibration Circuitry Shunt calibration involves simulating the input of strain by changing the resistance of an arm in the bridge by some known amount This is accomplished by shunting or connecting a large resistor of known value across one arm of the bridge creating a known strain induced change in resistance You can then measure the output of the bridge and compare it to the expected voltage value You can use the results to correct gain errors in the entire measurement path or to verify general operation to gain confidence in the setup iyi Note The NI WSN 3214 does not support shunt calibration for the half bridge and full bridge measurement types The NI WSN 3214 supports shunt calibration for
59. t tre utilis s endroits ext rieur en France Vous pouvez contacter l Autorit de R gulation des Communications Electroniques et des Postes http www arcep fr pour la proc dure suivre Italia General authorization required for outdoor use Check with reseller for procedure to follow E necessaria un autorizzazione generale per l uso esterno Verificare con i rivenditori la procedura da seguire National Instruments 49 NI WSN 3214 User Guide and Specifications Nederland License required for outdoor installations Check with reseller for procedure to follow Licentie verplicht voor gebruik met buitenantennes Neem contact op met verkoper voor juiste procedure Japan The certified radio equipment is embedded in this device ASA UC URBE RIE V A ERR OS AR S YU CW ET Singapore Complies with IDA Standards DA105692 Taiwan R 0 C EE ZE FE We PE RE EE RA fL eS Bi HZ RTA dpt Aa eMail A B VU II BUG EB e ERE Au BIS EZ JLACUL HUBER JG SE TRE FY BE FES ANY EI eS DR KM REBT AT AEE E RR BIE 7I SE HORA TEE MTS PERE TEC ESAE ESE CARR os EDRI PE
60. ture of 25 C and the expected temperature variation is 20 C then the typical offset error for the measurement is as follows uV 1l offset erroryg 067 x SC x20 C pir 0 06 of range National Instruments 41 NI WSN 3214 User Guide and Specifications Gain dift ent ede orit 10 ppm C Offset drift Fullbridge tete dett 0 05 u V V per C Half bridge es ERERRRUARS 0 6 uL V V per C Quarter bridge eee 1 V V per C Shunt calibration Selection Software selectable Resistance 50 KQ 350 Q accuracy DSO Qr i ste ret et teen ie cocks 0 12 40t0 70 C viii chere eet 0 22 maximum 1KQ accuracy 259 G i aAA BHO ERU 0 11 40 t0 70 C i ceret eterne 0 19 maximum Table 4 Maximum Sampling Rate and Input Noise 1 Channel 2 Channel 3 Channel 4 Channel Measurement Sampling Sampling Sampling Sampling Total Noise Conditions Rate SPS Rate SPS Rate SPS Rate SPS UL V V ms Aperture time 4 096 1 560 1 092 862 0 76 250 us Aperture time 2 340 992 697 537 0 54 400 us Aperture time 1 260 585 404 306 0 38 750 us Aperture time 668 168 217 164 0 27 1 4 ms Aperture time 344 86 113 85 0 19 2 8 ms Aperture time 175 43 57 43 0 14 5 5 ms Aperture time 88 44 29 22 0 1 10 8 ms Aperture time 44 22 14 11 0 07 21 5 ms Filter 50 Hz 49 49 49 49 0 09 Low Power Filter 60 Hz 59 59 59 59 0 1 Low Power Filter 50 Hz 25 25 25 25 0 08 H
61. tware go to ni com info and enter wsnsoftware You must be an administrator to install NI software and devices on your computer Before connecting the hardware install the following software in the following order 1l NI LabVIEW 2011 or later 2 NILabVIEW Real Time Module 2011 or later required only for NI 9795 and NI 9792 support 3 NI RIO 4 0 or later required for NI 9795 support 4 NI LabVIEW WSN Module 2011 or later 5 NI WSN 1 3 1 or later includes NI MAX Y Tip NI WSN 1 3 1 or later and NI MAX are available for download at ni com support ay Note After installation of NI WSN the NI Wireless Sensor Network Getting Started Guide is available from Start All Programs National Instruments NI WSN Powering the NI WSN 3214 Device The NI WSN 3214 device can be powered by either an external power supply or four AA alkaline or lithium batteries Refer to the Specifications section for details about the input power and battery requirements National Instruments 11 NI WSN 3214 User Guide and Specifications If both battery and external power are connected the NI WSN 3214 functions from the external power input The device is designed to provide battery backup in the event of loss of external power and automatically switches to battery power when external power is lost Installing Batteries To install batteries in the NI WSN 3214 device complete the following steps N Caution The device is static sensitive Always properly
62. ured for Drive High Sourcing or Drive High and Low Sinking and Sourcing mode National Instruments 29 NI WSN 3214 User Guide and Specifications B Note Use the Node Properties dialog box in the LabVIEW Project Explorer window to change the DIO settings The NI WSN 3214 device has two bi directional digital I O channels Each channel supports eight operational modes depending on whether the channel is configured as digital output or digital input The NI WSN software controls the different modes of operation by turning on and off the high side and low side switches Digital Output Operational Modes The channels support the following digital output operational modes e Drive High Sourcing Drive Low Sinking e JV TIL Logic Open Collector with Pull Up Drive High and Low Sinking and Sourcing 3 Note When configured in a digital output mode reading the channel returns the state of the pin voltage with TTL thresholds Digital Input Operational Modes The channels support the following digital input operational modes e 24 V Sinking e 24 V Sinking with Power Management TTL Logic Contact Closure TTL Pull Up r 9 DIO PWR High Side Switch f f DIOx Internal emet gee o Low Side Switch 24 V Sinking Load NI WSN 3214 Figure 29 Simplified Circuit Diagram of One DIO Channel NI WSN 3214 User Guide and Specifications 30 ni com Connecting Digital Outputs

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