National Instruments NI 6115/6120 manual

DAQ NI 6115/6120 User Manual Multifunction I/O Devices for PCI/PXI/CompactPCI Bus Computers NI 6115/6120 User Manual November 2002 Edi tion Part Number 3228 12C-01[...]

Support Worldwide Technical Support and Product Info rmation ni.com National Instruments Corporate Headquarters 11500 North Mopac Expressway Aust in, Texas 78759-3504 USA Tel: 512 683 0100 Worldwide Offices Australia 03 9879 5166, Austria 0662 45 79 9 0 0, Belgium 02 757 00 20, Brazil 55 11 3262 3599, Canada (Calgary) 403 274 9391, Canada (Montre a[...]

Important Information Warranty The NI PCI-6115, NI PXI-6115, NI PCI-6120, an d NI PXI-6120 devices are warranted against defects in materials and workmans hip f or a period of one year from the date of shipment, as evidenced by re ceipts or other docu mentation. National In struments will, at it s option, repair or replace equipment that proves to [...]

Compliance FCC/Canada Radio Frequency Interference Compliance Determining FCC Class The Federal Communications Commission (FCC) has rules to protect wireless co mmunications from inte rference. The FCC places digital electronics into two classes. These classes are known as Class A (for use in industrial-commercial locations onl y) or Class B (for u[...]

Canadian Departmen t of Communications This Class B digital apparatus meets a ll requirements of the Cana dian Inte rfere nce-Causing Equi pment Regulations. Cet appareil numérique de la classe B respecte toutes les ex igences du Règlement sur le matériel brouilleur du Cana da. Compliance to EU Directives Readers in the European Union (EU) mu st[...]

© National Instruments Corporation vii NI 6115/6120 User Manual Contents About This Manual Conventions ............ .............. .............. .............. .............. .............. ............ .............. ....... x i National Instruments D ocumentatio n ............... .............. .............. ............ .............. .......[...]

Contents NI 6115/6120 User Manual viii ni.com Programmable Function Inputs ....................... .............. .............. .............. ...... 3-12 Device and RTSI Clocks ............. .............. .............. .............. .............. ............ 3-12 RTSI Triggers ......... .............. .............. .............. ..........[...]

Contents © National Instruments Corporation ix NI 6115/6120 User Manual GPCTR1_UP_DOWN Signal ..................... .............. .............. .......... 4-37 FREQ_OUT Signal ....................... .............. .............. .............. .......... 4-38 Field Wiring Considerations ............... .............. .............. ............[...]

© National Instruments Corporation xi NI 6115/6120 User Manual About This Manual This manual describes the electrical and mechanical aspects of the NI 6115/6120 and contains inform ation concerning its operation and programming. The NI 6115/6120 family includes the following devices: • NI PCI-6115 • NI PXI-6115 • NI PCI-6120 • NI PXI-6120 [...]

About This Manual NI 6115/6120 User Manual xii ni.com bold Bold text denotes items that you must select or click in the software, such as menu items and dialog box options. Bold text also denotes parameter names and har dware l abels. CompactPCI CompactPCI refers to the core specification defined by the PCI Industrial Computer Manufacturer’ s Gro[...]

About This Manual © National Instruments Corporation xiii NI 6115/6120 User Manual configuration instructions, specification information about the D A Q hardware, and application hints . • Software documentation—Y ou may hav e both application software and NI-D A Q documentation. NI applicatio n software includes LabVIEW and Measurement Studio[...]

© National Instruments Corporatio n 1-1 NI 6115/6120 User Manual 1 Introduction This chapter describes the NI 6115/6120 , lists what you need to get started , describes the optional software and optional equipment , and explains how to unpack the device. About the NI 6115/6120 Thank you for buying an NI 6115/6120. The NI 6115/612 0 is a Plug and P[...]

Chapter 1 Introduction NI 6115/6120 User Manual 1-2 ni.com you do not need the R TSI cable for system triggering and timing on the PXI. In addition, a phase-locked loop (PLL) circuit accomplishes the synchronization of multiple NI PXI-6115/ 6120 devices or other PXI devices which support PLL synchronization by allowing these de vices to all lock to[...]

Chapter 1 Introduction © National Instruments Corporatio n 1-3 NI 6115/6120 User Manual What Y ou Need to Get Started To set up and use the NI 6115/6120, yo u need the following: ❑ A computer or a PXI/Compact PCI chassis and controller (hereafter referred to as the computer) ❑ At least one of the follo wing de vices: – NI PCI-6115 – NI PXI[...]

Chapter 1 Introduction NI 6115/6120 User Manual 1-4 ni.com Software Programming Choices When programming National Instrumen ts DAQ hardware, you can use an NI application development environmen t (ADE) or other ADEs. In either case, you use NI-DAQ. NI-DAQ NI-DAQ, which shipped with the NI 6 115/6120, has an ex tensive library of functions that you [...]

Chapter 1 Introduction © National Instruments Corporatio n 1-5 NI 6115/6120 User Manual Figure 1-1. The Relationship Among the Programming Environment, NI-DAQ, and the Hardware T o download a free copy of the mo st recent v ersion of NI-DA Q, click Downloa d Software at ni.com . National Instruments ADE Software LabVIEW features interactive graphi[...]

Chapter 1 Introduction NI 6115/6120 User Manual 1-6 ni.com D A Q hardware. These Activ eX con trols provide a high-le vel programming interface for b uilding virtual instrument s (VIs). For V isual C++ deve lopers, Measurement Studio of fers a set of V isual C++ classes and tools to integrate those classes into V isual C ++ applications. The Activ [...]

Chapter 1 Introduction © National Instruments Corporatio n 1-7 NI 6115/6120 User Manual • Route the analog l ines separately from t he digital lines. • When using a cable shield, use separate shields for the analog and digital halves of the cable. Failure to do so results in noise coupling into the analog signals from transient digital signals[...]

Chapter 1 Introduction NI 6115/6120 User Manual 1-8 ni.com Safety Information The following section contains important safety inform ation that you must follow when installing and using the product. Do not operate the product in a manner not specified in this document. Misuse of the product can result in a hazard. Y ou can compromise the safety pro[...]

Chapter 1 Introduction © National Instruments Corporatio n 1-9 NI 6115/6120 User Manual Operate the product at or belo w the installation catego ry 1 marked on the hardware label. Measurement circuits are subjected to wo rking voltages 2 and transient stresses (overv oltage) from the circuit to which the y are connected during measurement or test [...]

© National Instruments Corporatio n 2-1 NI 6115/6120 User Manual 2 Installing and Configuring the NI 6115/6120 This chapter explains how to install and configure the NI 6115/6120 . Installing the Software Before you install th e NI 6115/6120, comp lete the following steps to install the software: 1. Install the ADE, such as LabVIE W or Measurement[...]

Chapter 2 Installing and Co nfiguring the NI 6115/6120 NI 6115/6120 User Manual 2-2 ni.com or bus master de vices. NI recommends installing the NI PXI-6115/6120 in such a slot. Note The PXI specif ication requires all slots to support b us master devices, b ut the CompactPCI specification does not. If you install in a CompactPCI non-master slot, yo[...]

Chapter 2 Installing and Configu ring the NI 6115/6 120 © National Instruments Corporatio n 2-3 NI 6115/6120 User Manual 8. Replace the co ver . 9. Plug in and p ower on the computer . The NI PCI-6115/6120 is now installed. Y ou are now ready to configure the hardware and software. Configuring the Device Because of the NI standard architectur e fo[...]

© National Instruments Corporatio n 3-1 NI 6115/6120 User Manual 3 Hardware Over view This chapter presents an o vervie w of the hardware functio ns on the NI 6115/6120. Figures 3-1 and 3-2 provide block diagrams for the NI 6115 and NI 6120, respectively . Figure 3-1. NI 611 5 Block Diagram Timing PFI / Trigger I/O Connector RTSI Bus STC Digital I[...]

Chapter 3 Hardware Overview NI 6115/6120 User Manual 3-2 ni.com Figure 3-2. NI 612 0 Block Diagram Analog Input The following sections descri be in detail each AI category. Input Mode The NI 6115/6120 support s only differential (DIFF) in put mode. For more information about DIFF input, refer to the Connecting An alog Input Signals section of Chapt[...]

Chapter 3 Hardware Overview © National Instruments Corporatio n 3-3 NI 6115/6120 User Manual Input Polarity and Input Range The NI 6115/6120 has bipolar inputs o nly. Bipolar input means that the midpoint of the input voltage ran ge is centered at zero volts. Y ou can independently conf igure each channel for a dif ferent input voltage range. The [...]

Chapter 3 Hardware Overview NI 6115/6120 User Manual 3-4 ni.com Considerations for Se lecting Input Ranges The range you select depends on the e xpected range of the incoming signal. A large input range can accommodate a large signal variation but reduces the voltage resolution. Choosing a sm aller input range improves the voltage resolution but ma[...]

Chapter 3 Hardware Overview © National Instruments Corporatio n 3-5 NI 6115/6120 User Manual Analog Output The NI 6115/6120 supplies two channel s of AO voltage at the I/O connector. The range is fixed at bipolar ±10 V. The A O channels on the NI 6115 contain 12-bit DA Cs that are capable of 4 MS/s for one channel or 2.5 MS/s for each of two c ha[...]

Chapter 3 Hardware Overview NI 6115/6120 User Manual 3-6 ni.com Figure 3-3. Analog T rigger Block Diagram for the NI 6115/6120 In below-lo w-lev el analog triggering mode, the trigger is generated when the signal value is less than lowValue , as sho wn in Figure 3-4. HighValue is unused. Figure 3-4. Below-Low-Level Analog T riggering Mode In abov e[...]

Chapter 3 Hardware Overview © National Instruments Corporatio n 3-7 NI 6115/6120 User Manual Figure 3-5. Above-High-Level Analog T riggering Mode In inside-region analog triggering mod e, the trigger is generated when t he signal v alue is between the lowV alue and the highV alue , as Figure 3-6 sho ws. Figure 3-6. Inside-Region Analog T riggering[...]

Chapter 3 Hardware Overview NI 6115/6120 User Manual 3-8 ni.com In low-hysteresis analog trigg ering mo de, the trigger is generated when the signal value is less than lo wV alue , with the hysteresis specified by highV alue , as Figure 3-8 shows. Figure 3-8. Low-Hysteresis Analog T riggering Mode The analog trigger circuit generates an internal di[...]

Chapter 3 Hardware Overview © National Instruments Corporatio n 3-9 NI 6115/6120 User Manual Figure 3-9. Eff ects of Hardware and Soft ware Filtering on Antialiasing Phase-Locked Loop Circuit ♦ NI PXI-6115/6120 A phase-locked loop (PLL) circuit accomplishes the synchronization of multiple NI PXI-6115/6120 de vices or other PXI devices which supp[...]

Chapter 3 Hardware Overview NI 6115/6120 User Manual 3-10 ni.com Figure 3-10. PLL Block Diagram Correlated Digital I/O The NI 6115/6120 contains eight lines of DIO for general-purpose use. You can software-configure g roups of individual lines for either input or output. The NI 6115/6120 includ es a FIFO for buffered operation. This operation allow[...]

Chapter 3 Hardware Overview © National Instruments Corporation 3-11 NI 6115/6120 User Manual configurable. F or example, Figure 3-11 sho ws th e signal routing multiplexer for controlling t he ST AR TSCAN signal. Figure 3-11. ST ARTSCAN Signal Routing This figure sho ws that ST AR TSCAN can be generated from a number of sources, including the exte[...]

Chapter 3 Hardware Overview NI 6115/6120 User Manual 3-12 ni.com Programmable Function Inputs The 10 PFIs are connected to the signal routing multiplexer for each timing signal, and software can select one of the PFIs as the ex ternal source for a given timing signal. It is important to note th at any PFI can be used as an input by any t iming sign[...]

Chapter 3 Hardware Overview © National Instruments Corporation 3-13 NI 6115/6120 User Manual In PCI, you can access all seven R TSI lines (R TSI<0..6 >) through their R TSI cable. W ith the NI PXI-611 5/6120, R TSI<0..5> con nects to PXI T rigger <0..5>, respecti vely , through the NI PXI-6 115/6120 backplane. In PXI, R TSI<6&[...]

Chapter 3 Hardware Overview NI 6115/6120 User Manual 3-14 ni.com Figure 3-13. PXI R TSI Bus Signal Connections Refer to the Connecting Ti ming Signals section of Chapter 4, Connecting Signals , for a description of the signals shown in Figures 3-12 and 3-13. PXI Bus Connector PXI Trigger (7) DAQ-STC TRIG1 TRIG2 CONVERT* UPDATE* WFTRIG GPCTR0_SOURCE[...]

© National Instruments Corporatio n 4-1 NI 6115/6120 User Manual 4 Connecting Signals This chapter describes how to connect input and out put signals to the NI 6115/6120 using the device I/ O connector. I/O Connector Figure 4-1 shows the pin assignments for the 68-pin I/ O connector on the NI 6115/6120. A signal descriptio n follows the connector [...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-2 ni.com Figure 4-1. I/O Connector Pi n Assignment for the NI 611 5/6120 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 ACH0– ACH1+ ACH1GND ACH2[...]

Chapter 4 Connecting Signals © National Instruments Corporatio n 4-3 NI 6115/6120 User Manual I/O Connector Sig nal Descriptions Table 4-2. Signal Descriptions for I/O Connector Pins Signal Name Reference Dir ection Description A CH<0..3>GND — — Grou nd for Analog Input Chan nels 0 through 3—Thes e pins are the bias curr ent return po [...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-4 ni.com PFI0/TRIG1 DGND Input Output PFI0/T rigger 1—As an input, this is either a PF I or the source for the hardware analog trigger . PFI signals are explained in the Connecting Timing Signals section later in this chapter. The hardware analog trigger is explained in the Analog Trigger se[...]

Chapter 4 Connecting Signals © National Instruments Corporatio n 4-5 NI 6115/6120 User Manual PFI8/GPCTR0_SOURCE DGND Input Output PFI8/Counte r 0 Source—As an input, this is a PFI. As an output, this is the GPCT R0_SOURCE signal. This signal reflects the actual source c onnected to the general-purpose counter 0. PFI9/GPCTR0_GA TE DGND Input Out[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-6 ni.com Table 4-4. An alog I/O Summar y for the NI 6120 Signal Name Signal T ype and Direction Impedance Input/ Output Protection (V olts) On/Off Source (mA at V) Sink (mA at V) Rise Tim e (ns) Bias AC H < 0 . . 3> + AI 100 G Ω to GND ±42 V to GND — — — ±300 pA AC H < 0 . .[...]

Chapter 4 Connecting Signals © National Instruments Corporatio n 4-7 NI 6115/6120 User Manual T ypes of Signal Sources When making signal connections, you mu st first determine whether the signal sources are floating or ground-referenced. Th e following sections describe these two types of signals. Floating Signal Sources A floating signal source [...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-8 ni.com source. You must tie the ground reference of a floating signal to the NI 6115/6120 AI ground to establish a local or onboard reference for the signal. Otherwise, the measured input si gnal varies as the source floats out of the common-mode input range. Ground-Referenced Signal Sources[...]

Chapter 4 Connecting Signals © National Instruments Corporatio n 4-9 NI 6115/6120 User Manual Connections for Ground-Ref erenced Signal Sources Figures 4-2 and 4-3 show how to connect a ground-referenced signal source to a channel on the NI 6115 and NI 6120, respectively. Figure 4-2. Pseudodifferential Input C onnections on the NI 6115 for Ground-[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-10 ni.com Figure 4-3. Pseudodifferential Input C onnections on the NI 6120 for Ground-Referenced Signals W ith th is type of connection, the PGIA rejects both the comm on-mode noise in the si gnal and the gro und potential difference between the signal source and the de vice ground, shown as V[...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-11 NI 6115/6120 User Manual Connections for Nonreferenced or Floating Si gnal Sources Figures 4-4 and 4-5 show how to connect a floating signal source to a channel on the NI 6115 and NI 6120, respectiv ely. Figure 4-4. Differential Input Con nections on the NI 6115 for Nonreferenced[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-12 ni.com Figure 4-5. Differential Input Connections on the NI 6120 for Nonreferenced Signals Figures 4-4 and 4-5 show a bias resist or connected between A CH0– and the floating signal source ground. This resistor provides a return path for the ±200 pA bias current. A v alue of 10 k Ω to [...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-13 NI 6115/6120 User Manual Like an y amplifier , the common-mode rejection ratio (CMRR) of the PGIA is limited at high frequen cy . This lim itation has been comp ensated for in the design of the NI 6115/6120 by using a common-mode chok e on each channel. ♦ NI 6115 The purpose of[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-14 ni.com Connecting Analog Output Signals The AO signals are DAC0OUT, DAC1OUT, and AOGND. D AC0OUT is the v oltage output signal for A O channel 0. D A C1OUT is the voltage output signal for A O channel 1. A OGND is the ground -reference signal for the A O channels. A OGND is a hard ground. F[...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-15 NI 6115/6120 User Manual Connecting Digital I/O Signals The DIO signals are DIO<0..7> and DGND. DIO< 0..7> are the signals making up the DIO port, an d DGND is the ground-reference signal for t he DIO port. You can program groups of individual lines to be inp uts or o[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-16 ni.com Figure 4-7 shows DIO<0..3> conf igured for digital input and DIO<4..7> configured for digital ou tput. Digital input appli cations include recei ving TTL signals and sensing external devi ce states such as the switch state shown in Figure 4-7. Digital output application s[...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-17 NI 6115/6120 User Manual Figure 4-8. Clock Signal Drivi ng DI and DO Signals Figure 4-9 shows a DIO operation dri ven b y the A O Update signal on its rising edge. Figure 4-9. Rising-Edge AO Update Si gnal Driving a DIO Signal CLK DI<7:4> DO<3:0> AO Update DIO[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-18 ni.com Figure 4-10 shows a DIO operation dri ven by an R TSI clock signal on its falling edge. Figure 4-10. Falling-Edge RTSI Clock Si gnal Driving a DIO Signal Power Connections Two pins on the I/O connector supply +5 V fro m the computer power supply using a self-resetting fuse. The fuse [...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-19 NI 6115/6120 User Manual The D A Q signals are explained in the DAQ Timing Connections section later in this chapter . The Waveform Generation Timing Connections section later in this chapter explains the wa veform generation signals, and the General-Purpose Timing Signal Connect[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-20 ni.com Programmable Functi on Input Connections You can externally control 13 intern al timing signals from the PFI pins. The source for each of these signals is software selectab le from any PFI when you want external control. This flexibl e routing scheme reduces the need to change the ph[...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-21 NI 6115/6120 User Manual Figure 4-12. T ypical Posttriggered Acquisition Pretriggered data acquisition allows you to vie w data that is acquired b efore the trigger of interest in addition to data acquired aft er the trigger . Figure 4-13 shows a typical pretriggered DA Q sequ en[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-22 ni.com Refer to Chapter 3, Hardware Overview , for more information on analog triggering. As an output, TRIG1 reflects the action that initiates a DA Q sequence ev en if another PFI is externally triggering the acquisition. The output is an acti ve high pulse with a pulse width of 25 to 50 [...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-23 NI 6115/6120 User Manual selection for either rising or falling edge. The selected edge of TRIG2 initiates the posttrigg ered phase of a pretriggered D A Q sequence. In pretriggered mode, the TRIG1 signal initiates the acquisi tion. The scan counter indicates the m inimum number [...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-24 ni.com ST ARTSCAN Signal Any PFI pin can receive as an input th e STARTSCAN signal, which is available as an output on the PFI7/STARTSCAN pin. Refer to Figures 4-18 and 4-19 for the relatio nship of STARTSCAN to the DAQ sequence. As an input, ST AR TSCAN is con figur ed in the edge-detectio[...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-25 NI 6115/6120 User Manual Figure 4-19. ST ARTSCAN Output Signal T iming The CONVER T* pulses are masked of f until th e de vice generates ST AR TSCAN. If you are using interna lly g enerated con versions, the first CONVER T* appears when the onboard sample inte rval counter reache[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-26 ni.com CONVER T* Signal Any PFI pin can receive as an in put the CONVERT* signal, which is available as an output on the PFI2/CONVERT* pin. Refer to Figures 4-20 and 4-21 for the relationship of CONVER T* to the D A Q sequence. As an input, CONVER T* is configured in the edge-detection mode[...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-27 NI 6115/6120 User Manual The ADC switches t o hold mode wi thin 20 ns of the selected edge. This hold-mode delay tim e is a function of temperature and does not vary from one con version to the next. The sample interval counter on the NI 6115/6120 device normally generates CONVER[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-28 ni.com Either the 20 MHz or 100 kHz inte rnal timebase generates SISOURCE unless you select some external source. Fig ure 4-22 shows the timing requirements for SISOURCE. Figure 4-22. SISOURCE Signal Timing SCANCLK Signal SCANCLK is an outp ut-only signal that generates a pulse with the lea[...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-29 NI 6115/6120 User Manual EXTSTROBE* Signal EXTSTROBE* is an output-only signal that generates either a single pulse or a sequence of eight p ulses in th e hardware-strobe mo de. An external device can use this signal to latch signals or to trigger events. In the single-pulse mode[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-30 ni.com Figures 4-25 and 4-26 show the tim ing requirements for WF TRIG. Figure 4-25. WF TRIG Input Signal Timing Figure 4-26. WF TRIG Output Signal T iming UPDA TE* Signal Any PFI pin can receive as an in put the UPDATE* si gnal, which is available as an output on the PFI5/UPDATE* pin. As a[...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-31 NI 6115/6120 User Manual Figures 4-27 and 4-28 show the timing requirements for UP D A TE*. Figure 4-27. UPDA TE* Input Signal T iming Figure 4-28. UPDA TE* Output Signal Timing The D ACs are updated within 100 ns of the leading edge. Separate the UPD A TE* pulses with enough tim[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-32 ni.com Figure 4-29. UISOURCE Signal T iming The maximum allowed frequency is 20 MHz, with a minimum pulse widt h of 10 ns high or low . There is no minimum frequency limitation . Either the 20 MHz or 100 kHz inte rn al timebase normally generates UISOURCE unless you select some external sou[...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-33 NI 6115/6120 User Manual Figure 4-30 shows the timing requirements for GPCTR0_SOURCE. Figure 4-30. GPCTR0_SOURCE Signal Timing The maximum allowed frequency is 20 MHz, with a minimum pulse width of 10 ns high or low . There is no minimum frequency limitation . The 20 MHz or 100 k[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-34 ni.com Figure 4-31 shows the timing requirements for GPCTR0_GA TE. Figure 4-31. GPCTR0_GA TE Signal Timing in Edge-Detection Mode GPCTR0_OUT Signal This signal is available as an output on the GPCTR0_OUT pin. The GPCTR0_OUT sign al reflects the terminal count (TC) of general-purpose counter[...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-35 NI 6115/6120 User Manual GPCTR0_UP_DOWN Signal This signal can be received as an inpu t on the DIO6 pin and is not available as an output on the I/O connector. The general-purpose counter 0 count s down when this pin is at a logic low and cou nt up when it is at a logic high. You[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-36 ni.com GPCTR1_GA TE Signal Any PFI pin can receive as an input th e GPCTR1_GATE signal, which is available as an output on the PFI4/GPCTR1_GATE pin. As an input, GPCTR1_GA TE is configured in edge-detection mode. Y ou can select any PFI pin as the sour ce for GPCTR1_GA TE and configure the [...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-37 NI 6115/6120 User Manual Figure 4-35 shows the timing requireme nts for GPCTR1_OU T . Figure 4-35. GPCTR1_OUT Signal Timing GPCTR1_UP_DOWN Signal This signal can be received as an inpu t on the DIO7 pin and is not available as an output on the I/O conn ector. General-purpose coun[...]

Chapter 4 Connecting Signals NI 6115/6120 User Manual 4-38 ni.com The GA TE and OUT signal transitions shown in Figure 4-36 are referenced to the rising edge of the SOURCE sign al. This timi ng diagram assumes that the counters are programmed to count rising edges. The same timing diagram, but with the source signal in verted and referenced to the [...]

Chapter 4 Connecting Signals © National Instruments Corporation 4-39 NI 6115/6120 User Manual Field Wiring Considerations Environmental noise can se riously affect the meas urement accuracy of the NI 6115/6120 if you do not take prop er care when running signal wires between signal sources and the device. The followi ng recommendations apply mainl[...]

© National Instruments Corporatio n 5-1 NI 6115/6120 User Manual 5 Calibration This chapter discusses the calibration procedures for the NI 6115/6120. NI-DAQ includ es calibration fun ctions fo r performin g all of the steps in the calibration process. Calibration refers to the process of minimizing m easurement and output voltage errors b y makin[...]

Chapter 5 Calibr ation NI 6115/6120 User Manual 5-2 ni.com This method of calibration is not very accurate because it does not take into account the fact that the de vice measur ement and output voltage errors can v ary with time and temperature. It is be tter to self-calibrate when the device is installed in the en vironment in which it is used. S[...]

Chapter 5 Calibration © National Instruments Corporatio n 5-3 NI 6115/6120 User Manual T o externally calibrate your de vice, be sure to use a very accurate external reference. The reference should be se veral times more accurate than the device itself. For a detailed calibration procedure for the NI 6115/6120, click Manual Calibration Procedures [...]

© National Instruments Corporation A-1 NI 611 5/6120 User Manual A Specifications This appendix list s the specifications of the NI 6115/6120. These specifications are typical at 25 °C unless otherwise noted. Analog Input Input Characteristics Number of channels ..... ........... ...... ......... 4 pseudodifferential Type of ADC Resolution NI 611[...]

Appendix A Specifications NI 6115/6120 User Manual A-2 ni.com ACH+ to ACHGND NI 6115 ................... .............. ....100 G Ω NI 6120 ................... .............. ....100 G Ω Input bias current ............. .............. .........±300 pA Input offset current . .............. .............. ....±200 pA Input coupling ............[...]

Appendix A Specifications © National Instruments Corporation A-3 NI 6115/6120 User Manual Table A-1. NI 6115 Analog Input DC Accuracy I nformation Nomina l Range (V) Absolute Accuracy Relative Accuracy % of Read ing Offset (mV) Noise + Quantization (mV) Te m p Drift (%/°C) Absolute Accuracy at Full Scale ( ± mV) Resolution (mV) Full Scale 24 Hou[...]

Appendix A Specifications NI 6115/6120 User Manual A-4 ni.com Dynamic Characteristics Interchannel skew .................... .............. .1 ns typ Analog filters Number NI 6115 ................. .............. ......2 NI 6120 ................. .............. ......1 Type NI 6115 ................. .............. ......3-pole Bessel NI 6120 ......[...]

Appendix A Specifications © National Instruments Corporation A-5 NI 6115/6120 User Manual Table A-3. NI 6115 Analog Input Dynamic Characteristics Input Range Bandwidth (MHz) 1 SFDR T yp (dB) 2 SFDR Max (dB) CMRR (dB) 3 System Noise (LSB rms ) 4 ±50 V 5.5 78 70 34 0.35 ±20 V 4.4 78 70 40 0.45 ±10 V 7.2 81 75 46 0.35 ±5 V 4.8 81 75 52 0.35 ±2 V[...]

Appendix A Specifications NI 6115/6120 User Manual A-6 ni.com Figure A-1. NI 6115 T otal Harmonic Distortion Plus Noise (THD + N) 0.1 38 44 50 56 62 68 74 1.0 10.0 THD+N (–dBc) F requency (MHz) ±10 V ±5 V ±2 V ±1 V ±0.5 V ±0.2 V Full-Scale (–0.3 dB) Input Amplitude[...]

Appendix A Specifications © National Instruments Corporation A-7 NI 6115/6120 User Manual Figure A-2. NI 6120 T otal Harmonic Distortion Plus Noise (THD + N) Full-Scale (–0.3 dB) Input Amplitude Frequency (kHz) 75 77 79 81 83 85 ± 5 V ± 2 V ± 1 V ± 0.5 V ± 0.2 V ± 10 V THD+N (–dBc) 1 10 100[...]

Appendix A Specifications NI 6115/6120 User Manual A-8 ni.com Figure A-3. NI 6115 High-V oltage THD + N 0.1 38 44 50 56 62 68 74 1.0 10.0 THD+N (–dBc) F requency (MHz) High-V oltage Ranges, only ±10 V Input Amplitude ±50 V ±20 V[...]

Appendix A Specifications © National Instruments Corporation A-9 NI 6115/6120 User Manual Figure A-4. NI 6120 High-V oltage THD + N High-Voltage Ranges, only ±10 V Input Amplitude 80.0 80.5 81.0 81.5 82.0 82.5 83.0 83.5 84.0 84.5 85.0 1 10 100 Frequency (kHz) THD+N (–dBc) ± 50 V ± 20 V[...]

Appendix A Specifications NI 6115/6120 User Manual A-10 ni.com Figure A-5. NI 6115 THD + N with Filters 10 62 63.2 65.6 66.8 68 70.4 71.6 100 1000 THD+N (–dBc) F requency (kHz) With Filters, Full-Scale Input f or Range of ±1 V 69.2 64.4 50 kHz 500 kHz[...]

Appendix A Specifications © National Instruments Corporation A-11 N I 6115/6120 User Manual Figure A-6. NI 6120 THD + N with Filters Stability Recommended warm-up time ................ 15 min Offset temperature coefficient Pregain NI 6115 .......... .............. ............ ±12 µ V/°C NI 6120 ............. .............. ......... ±1.5 µ V[...]

Appendix A Specifications NI 6115/6120 User Manual A-12 ni.com Onboard calibration reference Level ................ .............. .............. ....5.000 V (±2.5 mV) (actual value stored in EEPROM) Temperature coefficient............. ......±4.1 ppm/°C max Long-term stability ................. ......... Analog Output Output Characteristics Num[...]

Appendix A Specifications © National Instruments Corporation A-13 N I 6115/6120 User Manual V oltage Output Ranges .......................... .............. ........... . ±10 V Output coupling....................... .............. . DC Output impedance ...................... ............ 50 Ω ±5% Current drive ........................ ........[...]

Appendix A Specifications NI 6115/6120 User Manual A-14 ni.com Dynamic Characteristics Slew rate NI 6115 ..................... .............. .........300 V/ µ s NI 6120 ..................... .............. .........15 V/ µ s Noise NI 6115 .................. .............. ............600 µ V rms , DC to 5 MHz NI 6120 .................. ........[...]

Appendix A Specifications © National Instruments Corporation A-15 N I 6115/6120 User Manual Digital I/O Number of channels ...................... ......... 8 input/output Compatibility ...... .............. .............. ....... TTL/CMOS Power-on state ........... .............. .............. . Input (high-impedance) Data transfers .............[...]

Appendix A Specifications NI 6115/6120 User Manual A-16 ni.com Base clock accuracy ......... ........... ............± 0.01% Max source frequency................. ............20 MHz Min source pulse duration ......... ............10 ns, edge-detect mode Min gate pulse duration ..................... ....10 ns, edge-detect mode Data transfers ......[...]

Appendix A Specifications © National Instruments Corporation A-17 N I 6115/6120 User Manual Digital T rigger Compatibility ...... .............. .............. ....... TTL Response .......... ............................. ......... Rising or falling edge Pulse width ........................ .............. ....... 10 ns min RT S I Trigger lines ...[...]

Appendix A Specifications NI 6115/6120 User Manual A-18 ni.com Relative humidity .................... .............. .10 to 90% noncondensing Pollution Degree (indoor use only) ........ 2 Safety The NI 6115/6120 was ev alua ted using the criteria of EN 61010-1 a-2:19 95 and meets the requirements of the follo wing standards for safety and electrica[...]

© National Instruments Corporation B-1 NI 6115/6120 User Manual B Common Questions This appendix contains a list of commonly asked questions and their answers relating to usage and special features of the NI 6115/6120. General Information What is the NI 6115/61 20? The NI 6115/6120 is a switchless and jumperless enhanced MIO device that uses the D[...]

Appendix B Common Question s NI 6115/6120 User Manual B-2 ni.com What type of 5 V pr otection does the NI 6115/6120 hav e? The NI 6115/6120 has 5 V lines equipped with a self-resetting 1 A fuse. How do I use the NI 6115/6120 with the NI-D A Q C API? The NI-DAQ User Manual for PC Compa tibles describes the general programming flow when using the NI [...]

Appendix B Common Questions © National Instruments Corporation B-3 NI 6115/6120 User Manual Analog Input and Output Why is ther e a minimum sampling rate on the NI 6115? The NI 6115 makes use of a pipelined ADC in order to achie ve high sampling rates. Samp ling at rates below 20 kS/s can result in improper digitization, which appear as noise in t[...]

Appendix B Common Question s NI 6115/6120 User Manual B-4 ni.com I’m using the D A Cs to generate a wa veform, b ut I discov ered with a digital oscilloscope that there ar e gl itches on the output signal. Is this normal? When the D AC switches from one volta ge to another , any D A C produces glitches due to released charges. The larg est glitch[...]

Appendix B Common Questions © National Instruments Corporation B-5 NI 6115/6120 User Manual T i ming and Digital I/O What types of triggering can be hard ware-imp lemented on th e NI 6115/6120? Hardware digital and analog triggering are both supported on the NI 6115/6120. If I’m using one of the general-pur pose counter/timers on the NI 6115/612[...]

Appendix B Common Question s NI 6115/6120 User Manual B-6 ni.com Caution If you enable a PFI line for output, do not connect any e xternal signal source to it; if you do, you can damage the device, th e computer , and the connected equipment. What are the power- on states of the PFI and DIO lines on the I/O connector? At system power-on and reset, [...]

© National Instruments Corporation C-1 NI 6115/6120 User Manual C T echnical Support and Professional Ser vices Visit the following sections of the NI Web site at ni.com for technical support and professional services: • Support —Online technical support resources include the following: – Self-Help Resources —For immediate answ ers and sol[...]

Appendix C T echnical Support and Professional Ser vices NI 6115/6120 User Manual C-2 ni.com • Calibration Certificate —If your product suppor ts calibration, you can obtain the calibration certif icate for your product at ni.com/calibration . If you searched ni.com and could not find the answers you need, contact your local off ice or NI corp [...]

© National Instruments Corporation G- 1 NI 6115/6120 User Manual Glossar y Pref ix Meaning V alue p- pico- 10 –1 2 n- nano- 10 –9 µ -m i c r o - 1 0 –6 m- milli- 10 –3 k- kilo- 10 3 M- me ga- 10 6 Numbers/Symbols °d e g r e e > greater than ≥ greater than or equal to < less than ≤ less than or equal to /p e r % percent ± plus [...]

Glossary NI 6115/6120 User Manual G- 2 ni.com A A amperes A/D analog-to-digital A C alternating current A CH analog input channel signal A CH 0GND analog input channel ground sign al ADC analog-to-digital con ver ter—an electronic de vice, often an integrated circuit, that con verts an an al og voltage to a digital number ADE application de velop[...]

Glossary © National Instruments Corporation G- 3 NI 6115/6120 User Manual C CC e l s i u s CalD AC calibration DA C cm centimeter CMOS complementary metal-oxide semicond uctor CMRR common-mode rejection ratio—a measure of an instrument to reject interference from a common-mode signal, usually expressed in decibels (dB) CompactPCI a Eurocard conf[...]

Glossary NI 6115/6120 User Manual G- 4 ni.com D A Q -STC data acquisition system timing controller—an application-specific integrated circuit (ASIC) for the system tim ing requirements of a general A/D and D/A system, such as a system containing the National Instruments E Series de vices dB decibel—the unit for expressing a logarithmic measure [...]

Glossary © National Instruments Corporation G- 5 NI 6115/6120 User Manual ESD electrostatic discharge EXTSTR OBE* external stro be signal F F farad—a measurement unit of capacitance FIFO first-in first-out memory buf fer—t he first data stored is the first data sent to the acceptor; often used on D A Q de vices to temporar ily store incoming o[...]

Glossary NI 6115/6120 User Manual G- 6 ni.com GPCTR1_UP_DOWN general-purpos e counter 1 up do w n signal grounded signal sources signal sources with voltage signals that are referenced to a system ground, such as the earth or a b uilding ground; also called grounded signal sources H h hour Hz hertz—the number of scans read or updates written per [...]

Glossary © National Instruments Corporation G- 7 NI 6115/6120 User Manual L LabVIEW Laboratory V irtual Instrument Engineering W orkbench—a program dev elopment application based on the programming language G and used commonly for test and measurement purposes LED light emitting diode LSB least significant bit M master a functional part of a MXI[...]

Glossary NI 6115/6120 User Manual G- 8 ni.com N NC not connected (signal) NI National Instruments NI-D A Q National Instruments driv er software for D A Q hardware noise an undesirable electrical signal from e xternal sources such as the A C power line, motors, generators, transf ormers, fluorescent lights, sol dering irons, CR T displays, co mpute[...]

Glossary © National Instruments Corporation G- 9 NI 6115/6120 User Manual PFI2/CONVER T* PFI2/con vert PFI3/GPCTR1_ SOURCE PFI3/gener al purpose counter 1 source PFI4/GPCTR1_GA TE PFI4/general-purpose counter 1 gate PFI5/UPDA TE* PFI5/update PFI6/WFTRIG PFI6/wa veform trigger PFI7/ST AR TSCAN PFI7/start of scan PFI8/GPCTR0_ SOURCE PFI8/gener al-pu[...]

Glossary NI 6115/6120 User Manual G-10 ni.com rise time the difference in time between the 10% and 90% points of the step response of a system rms root mean sq uare R TD r esistiv e temperature detector—a metallic probe that measures temperature based upon its coef ficient of resisti vity R TSI bus real-time system integration bus—the National [...]

Glossary © National Instruments Corporation G-11 NI 6115/6120 User Manual T TC terminal count—the ending v alue of a counter t gh gate hold time t gsu gate setup tim e t gw gate pulse width THD total harm onic distortion—the rat io of the total rms signal due to harmonic distortion to the overall rm s signal, in decibe l or a percentage thermo[...]

Glossary NI 6115/6120 User Manual G-12 ni.com V Vv o l t s V CC collector common voltag e—po wer supply voltage V cm common-mode no ise and ground p otential VCXO voltage-controlled crystal oscillator VDC volts direct current VI virtual instrument—(1) a combination of hardware and/or software elements, typically used with a PC, that has the fun[...]

© National Instruments Corporatio n I-1 NI 6115/6120 User Manual Index Numerics +5 V signal description (table), 4-3 incorrect connecti ons (caution), 4-15 self-resetting fuse, 4-18, B-2 A above-high-level analog triggering mod e, 3-7 AC input coupling, 3-4 ACH<0..3>– signal analog input signal connecti ons, 4-8 description (table), 4-3 si[...]

Index NI 6115/6120 User Manual I-2 ni.com AOGND signal analog output signal connections, 4-14 description (table), 4-3 avoiding false triggering (note), 3-6 B base address for NI 6115/6120 device, B-2 below-low-level analog trigg ering mode, 3-6 bipolar input, 3-3 block diagrams analog trigger, 3-6 NI 6115 block diagram, 3-1 NI 6120 block diagram, [...]

Index © National Instruments Corporatio n I-3 NI 6115/6120 User Manual professional services, C-1 technical support, C-1 D DAC0OUT signal analog output signal connections, 4-14 description (table), 4-3 signal summary (table), 4-5 DAC1OUT signal analog output signal connections, 4-14 description (table), 4-3 signal summary (table), 4-5 DAQ timing c[...]

Index NI 6115/6120 User Manual I-4 ni.com external calibration, 5-2 EXTSTROBE* signal description (table), 4-3 signal summary (table), 4-6 timing connections, 4-2 9 F field wiring considerations, 4-39 floating signal sources description, 4-7 signal connections, 4 -11 FREQ_OUT signal description (table), 4-5 general-purpose timing connect ions, 4-38[...]

Index © National Instruments Corporatio n I-5 NI 6115/6120 User Manual GPCTR1_UP_DOWN signal digital I/O lines, 3-10 general-purpose timing connect ions, 4-37 ground-referenced signal sources description, 4-8 questions about, B-3 signal connections, 4 -9 H hardware installation procedure, 2-1 unpacking NI 611 5/6120, 1-8 hardware overview analog i[...]

Index NI 6115/6120 User Manual I-6 ni.com N National Instruments calibration certificate, C-2 customer education, C-1 Declaration of Conformity, C-1 documentation, xii professional services, C-1 system integration services, C-1 technical support, C-1 worldwide offices, C-2 NI 6115/6120 device See also hardware ov erview block diagrams NI 6115 block[...]

Index © National Instruments Corporatio n I-7 NI 6115/6120 User Manual PFI9/GPCTR0_GATE signal See also GPCTR0_GATE signal description (table), 4-5 signal summary (table), 4-7 PFIs (programmable fun ction inputs) questions about, B-5 signal name equivalen cies (table), B-5 signal routing, 3-10 timing connections, 4-2 0 phase-locked loop circuit bl[...]

Index NI 6115/6120 User Manual I-8 ni.com signal connections analog input connection s common-mode signal rejection, 4-12 floating signal sources, 4-11 ground-referenced signal sources, 4-9 nonreferenced signal sources, 4-11 analog output connections, 4-14 data acquisition timing connections AIGATE signal, 4-27 CONVERT* signal, 4-2 6 EXTSTROBE* sig[...]

Index © National Instruments Corporatio n I-9 NI 6115/6120 User Manual bus interface, A-17 digital I/O, A-15 electromagnetic co mpatibility, A -18 environmental, A-17 physical, A-17 power requirements, A-1 7 RTSI trigger lines, A-17 safety, A-18 timing I/O, A-15 triggers analog trigger, A-16 digital trigger, A-17 stability specifications analog in[...]

Index NI 6115/6120 User Manual I-10 ni.com TRIG1 signal See also PFI0/TRIG1 signal input timing (f igure), 4-22 output timing (figure), 4-22 RTSI bus signal connections (figure), 3-13 timing connections, 4-2 1 typical posttriggered acquisition (figure), 4-21 typical pretriggered acquisition (figure), 4-21 TRIG2 signal See also PFI1/TRIG2 signal inp[...]