Page 3 - Important Information
Important Information Warranty The NI 6232/6233 is warranted against defects in materials and workmanship for a period of three years from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be de...
Page 5 - Compliance; Determining FCC Class; Class A; Compliance with EU Directives
Compliance Compliance with FCC/Canada Radio Frequency Interference Regulations Determining FCC Class The Federal Communications Commission (FCC) has rules to protect wireless communications from interference. The FCC places digital electronics into two classes. These classes are known as Class A (fo...
Page 6 - Contents; About This Manual
© National Instruments Corporation vii NI 6232/6233 User Manual Contents About This Manual Conventions ................................................................................................................... xvRelated Documentation.............................................................
Page 12 - Glossary
Contents © National Instruments Corporation xiii NI 6232/6233 User Manual Using RTSI Terminals as Timing Input Signals ............................................. 10-6RTSI Filters ..................................................................................................... 10-6 PXI Clock a...
Page 13 - Conventions
© National Instruments Corporation xv NI 6232/6233 User Manual About This Manual The NI 6232/6233 User Manual contains information about using the National Instruments 6232/6233 M Series data acquisition (DAQ) devices with NI-DAQmx 8.0 and later. NI 6232/6233 devices feature eight analog input (AI) ...
Page 14 - Related Documentation
About This Manual NI 6232/6233 User Manual xvi ni.com monospace Text in this font denotes text or characters that you should enter from the keyboard, sections of code, programming examples, and syntax examples. This font is also used for the proper names of disk drives, paths, directories, programs,...
Page 15 - LabVIEW
About This Manual © National Instruments Corporation xvii NI 6232/6233 User Manual The NI-DAQmx for Linux Configuration Guide provides configuration instructions, templates, and instructions for using test panels. Note All NI-DAQmx documentation for Linux is installed at /usr/local/ natinst/nidaqmx/...
Page 16 - LabWindows; Measurement Studio; ANSI C without NI Application Software
About This Manual NI 6232/6233 User Manual xviii ni.com • Getting Started»Getting Started with DAQ —Includes overview information and a tutorial to learn how to take an NI-DAQmx measurement in LabVIEW using the DAQ Assistant. • VI and Function Reference»Measurement I/O VIs and Functions —Describes t...
Page 17 - Device Documentation and Specifications; Training Courses
About This Manual © National Instruments Corporation xix NI 6232/6233 User Manual .NET and Visual C++ class libraries. This help collection is integrated into the Visual Studio .NET documentation. In Visual Studio .NET, select Help»Contents . Note You must have Visual Studio .NET installed to view t...
Page 18 - Getting Started; Installing Other Software; Device Pinouts
© National Instruments Corporation 1-1 NI 6232/6233 User Manual 1 Getting Started M Series NI 6232/6233 devices feature sixteen analog input (AI) channels, two analog output (AO) channels, two counters, six lines of digital input (DI), and four lines of digital output (DO). If you have not already i...
Page 19 - Device Specifications; Device Accessories and Cables
Chapter 1 Getting Started NI 6232/6233 User Manual 1-2 ni.com Device Specifications Refer to the NI 6232/6233 Specifications , available on the NI-DAQ Device Document Browser or ni.com/manuals , for more detailed information on the NI 6232/6233 device. Device Accessories and Cables NI offers a varie...
Page 20 - DAQ System Overview; DAQ Hardware
© National Instruments Corporation 2-1 NI 6232/6233 User Manual 2 DAQ System Overview Figure 2-1 shows a typical DAQ system, which includes sensors, transducers, cables that connect the various devices to the accessories, the M Series device, programming software, and a PC. The following sections co...
Page 22 - Calibration Circuitry; Sensors and Transducers
Chapter 2 DAQ System Overview © National Instruments Corporation 2-3 NI 6232/6233 User Manual Calibration Circuitry The M Series analog inputs and outputs have calibration circuitry to correct gain and offset errors. You can calibrate the device to minimize AI and AO errors caused by time and temper...
Page 23 - Cables and Accessories; Custom Cabling
Chapter 2 DAQ System Overview NI 6232/6233 User Manual 2-4 ni.com Cables and Accessories NI offers a variety of products to use with NI 6232/6233 devices, including cables, connector blocks, and other accessories, as follows: • Cables and cable assemblies – Shielded – Unshielded ribbon • Screw termi...
Page 24 - Programming Devices in Software
Chapter 2 DAQ System Overview © National Instruments Corporation 2-5 NI 6232/6233 User Manual Programming Devices in Software National Instruments measurement devices are packaged with NI-DAQ driver software, an extensive library of functions and VIs you can call from your application software, such...
Page 25 - Connector Information; I/O Connector Signal Descriptions
© National Instruments Corporation 3-1 NI 6232/6233 User Manual 3 Connector Information The I/O Connector Signal Descriptions and RTSI Connector Pinout sections contain information on M Series connectors. Refer to Appendix A, Device-Specific Information , for device I/O connector pinouts. I/O Connec...
Page 27 - RTSI Connector Pinout
Chapter 3 Connector Information © National Instruments Corporation 3-3 NI 6232/6233 User Manual RTSI Connector Pinout Refer to the RTSI Connector Pinout section of Chapter 10, Digital Routing and Clock Generation , for information on the RTSI connector.
Page 28 - Analog Input Circuitry
© National Instruments Corporation 4-1 NI 6232/6233 User Manual 4 Analog Input Figure 4-1 shows the analog input circuitry of NI 6232/6233 devices. Figure 4-1. NI 6232/6233 Analog Input Circuitry Analog Input Circuitry I/O Connector You can connect analog input signals to the M Series device through...
Page 29 - Analog Input Range
Chapter 4 Analog Input NI 6232/6233 User Manual 4-2 ni.com Ground-Reference Settings The analog input ground-reference settings circuitry selects between differential and referenced single-ended modes. Each AI channel can use a different mode. Instrumentation Amplifier (NI-PGIA) The NI programmable ...
Page 33 - Multichannel Scanning Considerations; Use Low Impedance Sources
Chapter 4 Analog Input NI 6232/6233 User Manual 4-6 ni.com Figure 4-3. Enabling Multimode Scanning in LabVIEW Multichannel Scanning Considerations M Series devices can scan multiple channels at high rates and digitize the signals accurately. However, you should consider several issues when designing...
Page 34 - Use Short High-Quality Cabling; Carefully Choose the Channel Scanning Order
Chapter 4 Analog Input © National Instruments Corporation 4-7 NI 6232/6233 User Manual Settling times increase when scanning high-impedance signals due to a phenomenon called charge injection. Multiplexers contain switches, usually made of switched capacitors. When one of the channels, for example c...
Page 35 - Insert Grounded Channel between Signal Channels; Minimize Voltage Step between Adjacent Channels
Chapter 4 Analog Input NI 6232/6233 User Manual 4-8 ni.com 1/50 LSB) of the ±10 V range. Some devices can take many microseconds for the circuitry to settle this much. To avoid this effect, you should arrange your channel scanning order so that transitions from large to small input ranges are infreq...
Page 36 - Avoid Scanning Faster Than Necessary; Analog Input Data Acquisition Methods; Software-Timed Acquisitions
Chapter 4 Analog Input © National Instruments Corporation 4-9 NI 6232/6233 User Manual Avoid Scanning Faster Than Necessary Designing your system to scan at slower speeds gives the PGIA more time to settle to a more accurate level. Here are two examples to consider. Example 1 Averaging many AI sampl...
Page 37 - Hardware-Timed Acquisitions; Buffered
Chapter 4 Analog Input NI 6232/6233 User Manual 4-10 ni.com each ADC conversion. In NI-DAQmx, software-timed acquisitions are referred to as having on-demand timing. Software-timed acquisitions are also referred to as immediate or static acquisitions and are typically used for reading a single sampl...
Page 38 - Analog Input Triggering
Chapter 4 Analog Input © National Instruments Corporation 4-11 NI 6232/6233 User Manual be transferred to host memory. The device generates an error in this case. With continuous operations, if the user program does not read data out of the PC buffer fast enough to keep up with the data transfer, th...
Page 39 - Types of Signal Sources
Chapter 4 Analog Input NI 6232/6233 User Manual 4-12 ni.com Refer to the Analog Input Ground-Reference Settings section for descriptions of DIFF and RSE modes. Types of Signal Sources When configuring the input channels and making signal connections, first determine whether the signal sources are fl...
Page 40 - Floating Signal Sources
Chapter 4 Analog Input © National Instruments Corporation 4-13 NI 6232/6233 User Manual two reference planes. Isolated front ends require a ground-reference point to the signal that is being measured. Floating Signal Sources A floating signal source is not connected to the building ground system (ea...
Page 42 - Differential Input Biasing
Chapter 4 Analog Input © National Instruments Corporation 4-15 NI 6232/6233 User Manual With this type of connection, the PGIA rejects both the common-mode noise in the signal and the ground potential difference between the signal source and the device ground, shown as V cm in the figure. Refer to t...
Page 43 - Single-Ended Connection Considerations
Chapter 4 Analog Input NI 6232/6233 User Manual 4-16 ni.com Figure 4-5. Differential Connections for Floating Signal Sources This figure shows AI GND connected to the ground reference point for the floating signal source. If you do not connect AI GND, the source is not likely to remain within the co...
Page 45 - Field Wiring Considerations
Chapter 4 Analog Input NI 6232/6233 User Manual 4-18 ni.com Figure 4-6. Single-Ended Connections for Floating Signal Sources (RSE Configuration) Refer to the NI 6232/6233 Specifications for the usable range of V cm . Common-Mode Signal Rejection Considerations For signal sources that are already ref...
Page 46 - Analog Input Timing Signals
Chapter 4 Analog Input © National Instruments Corporation 4-19 NI 6232/6233 User Manual • Use individually shielded, twisted-pair wires to connect AI signals to the device. With this type of wire, the signals attached to the positive and negative input channels are twisted together and then covered ...
Page 49 - AI Sample Clock Signal
Chapter 4 Analog Input NI 6232/6233 User Manual 4-22 ni.com Figure 4-10. Pretriggered Data Acquisition Example If an ai/ReferenceTrigger pulse occurs before the specified number of pretrigger samples are acquired, the trigger pulse is ignored. Otherwise, when the ai/ReferenceTrigger pulse occurs, th...
Page 50 - Using an Internal Source; Using an External Source
Chapter 4 Analog Input © National Instruments Corporation 4-23 NI 6232/6233 User Manual Using an Internal Source One of the following internal signals can drive ai/SampleClock. • Counter n Internal Output • AI Sample Clock Timebase (divided down) • A software pulse A programmable internal counter di...
Page 51 - AI Sample Clock Timebase Signal
Chapter 4 Analog Input NI 6232/6233 User Manual 4-24 ni.com A counter on your device internally generates ai/SampleClock unless you select some external source. ai/StartTrigger starts this counter and either software or hardware can stop it when a finite acquisition completes. When using an internal...
Page 54 - Other Timing Requirements; AI Convert Clock Timebase Signal
Chapter 4 Analog Input © National Instruments Corporation 4-27 NI 6232/6233 User Manual Other Timing Requirements The sample and conversion level timing of M Series devices work such that clock signals are gated off unless the proper timing requirements are met. For example, the device ignores both ...
Page 55 - AI Hold Complete Event Signal
Chapter 4 Analog Input NI 6232/6233 User Manual 4-28 ni.com ai/ConvertClockTimebase is not available as an output on the I/O connector. AI Hold Complete Event Signal The AI Hold Complete Event (ai/HoldCompleteEvent) signal generates a pulse after each A/D conversion begins. You can route ai/HoldComp...
Page 56 - Routing AI Start Trigger to an Output Terminal; AI Reference Trigger Signal
Chapter 4 Analog Input © National Instruments Corporation 4-29 NI 6232/6233 User Manual You also can specify whether the measurement acquisition begins on the rising edge or falling edge of ai/StartTrigger. Routing AI Start Trigger to an Output Terminal You can route ai/StartTrigger out to any outpu...
Page 57 - Using a Digital Source; AI Pause Trigger Signal
Chapter 4 Analog Input NI 6232/6233 User Manual 4-30 ni.com Figure 4-14. Reference Trigger Final Buffer Using a Digital Source To use ai/ReferenceTrigger with a digital source, specify a source and an edge. The source can be any of the following signals: • Input PFI <0..5> • RTSI <0..7> ...
Page 58 - Getting Started with AI Applications in Software
Chapter 4 Analog Input © National Instruments Corporation 4-31 NI 6232/6233 User Manual Using a Digital Source To use ai/SampleClock, specify a source and a polarity. The source can be any of the following signals: • Input PFI <0..5> • RTSI <0..7> • PXI_STAR The source also can be one of...
Page 59 - Analog Output; Analog Output Circuitry
© National Instruments Corporation 5-1 NI 6232/6233 User Manual 5 Analog Output NI 6232/6233 devices have two AO channels that are controlled by a single clock and are capable of waveform generation. Figure 5-1 shows the analog output circuitry of NI 6232/6233 devices. Figure 5-1. NI 6232/6233 Analo...
Page 60 - Minimizing Glitches on the Output Signal; Analog Output Data Generation Methods; Software-Timed Generations
Chapter 5 Analog Output NI 6232/6233 User Manual 5-2 ni.com DACs. It allows you to download the points of a waveform to your M Series device without host computer interaction. AO Sample Clock The AO Sample Clock signal reads a sample from the DAC FIFO and generates the AO voltage. Isolation Barrier ...
Page 61 - Hardware-Timed Generations
Chapter 5 Analog Output © National Instruments Corporation 5-3 NI 6232/6233 User Manual Hardware-Timed Generations With a hardware-timed generation, a digital hardware signal controls the rate of the generation. This signal can be generated internally on your device or provided externally. Hardware-...
Page 62 - Analog Output Triggering; Connecting Analog Voltage Output Signals
Chapter 5 Analog Output NI 6232/6233 User Manual 5-4 ni.com Regeneration is the repetition of the data that is already in the buffer. Standard regeneration is when data from the PC buffer is continually downloaded to the FIFO to be written out. New data can be written to the PC buffer at any time wi...
Page 63 - Analog Output Timing Signals
Chapter 5 Analog Output © National Instruments Corporation 5-5 NI 6232/6233 User Manual Figure 5-2. Analog Output Connections Analog Output Timing Signals Figure 5-3 summarizes all of the timing options provided by the analog output timing engine. Load Load V OUT V OUT + – + – AO 1 AO 0 Channel 1 Ch...
Page 64 - AO Start Trigger Signal
Chapter 5 Analog Output NI 6232/6233 User Manual 5-6 ni.com Figure 5-3. Analog Output Timing Options NI 6232/6233 devices feature the following AO (waveform generation) timing signals. • AO Start Trigger Signal • AO Pause Trigger Signal • AO Sample Clock Signal • AO Sample Clock Timebase Signal AO S...
Page 65 - AO Pause Trigger Signal
Chapter 5 Analog Output © National Instruments Corporation 5-7 NI 6232/6233 User Manual The source also can be one of several internal signals on your DAQ device. Refer to Device Routing in MAX in the NI-DAQmx Help or the LabVIEW 8.x Help for more information. You also can specify whether the wavefo...
Page 66 - AO Sample Clock Signal
Chapter 5 Analog Output NI 6232/6233 User Manual 5-8 ni.com deasserted and another edge of the sample clock is received, as shown in Figure 5-5. Figure 5-5. ao/PauseTrigger with Other Signal Source Using a Digital Source To use ao/PauseTrigger, specify a source and a polarity. The source can be one ...
Page 68 - AO Sample Clock Timebase Signal; Getting Started with AO Applications in Software
Chapter 5 Analog Output NI 6232/6233 User Manual 5-10 ni.com Figure 5-6. ao/SampleClock and ao/StartTrigger AO Sample Clock Timebase Signal The AO Sample Clock Timebase (ao/SampleClockTimebase) signal is divided down to provide a source for ao/SampleClock. You can route any of the following signals ...
Page 70 - Digital Input and Output; Programmable Power-Up States
© National Instruments Corporation 6-1 NI 6232/6233 User Manual 6 Digital Input and Output NI 6232/6233 devices have six static digital input lines, P0.<0..5>. These lines also can be used as PFI inputs. The voltage input and output levels and the current drive level of the DI and DO lines are...
Page 71 - Connecting Digital I/O Signals
Chapter 6 Digital Input and Output NI 6232/6233 User Manual 6-2 ni.com Connecting Digital I/O Signals The DI signals P0.<0..5> are referenced to P0.GND and DO signals P1.<0..3> are referenced to P1.GND. Figures 6-1 and 6-2 show P0.<0..5> and P1.<0..3> on the NI 6232 and the N...
Page 72 - Logic Conventions
Chapter 6 Digital Input and Output © National Instruments Corporation 6-3 NI 6232/6233 User Manual Figure 6-2. NI 6233 Digital I/O Connections (DO Sink) Caution Exceeding the maximum input voltage or maximum working voltage ratings, which are listed in the NI 6232/6233 Specifications , can damage th...
Page 73 - Getting Started with DIO Applications in Software
Chapter 6 Digital Input and Output NI 6232/6233 User Manual 6-4 ni.com Getting Started with DIO Applications in Software You can use NI 6232/6233 devices in the following digital I/O applications: • Static digital input • Static digital output Note For more information about programming digital I/O ...
Page 74 - Counters
© National Instruments Corporation 7-1 NI 6232/6233 User Manual 7 Counters NI 6232/6233 devices have two general-purpose 32-bit counter/timers and one frequency generator, as shown in Figure 7-1. The general-purpose counter/timers can be used for many measurement and pulse generation applications. C...
Page 76 - Counter Input Applications; Counting Edges
Chapter 7 Counters © National Instruments Corporation 7-3 NI 6232/6233 User Manual Counter Input Applications Counting Edges In edge counting applications, the counter counts edges on its Source after the counter is armed. You can configure the counter to count rising or falling edges on its Source ...
Page 78 - Controlling the Direction of Counting
Chapter 7 Counters © National Instruments Corporation 7-5 NI 6232/6233 User Manual Non-Cumulative Buffered Edge Counting Non-cumulative edge counting is similar to buffered (sample clock) edge counting. However, the counter resets after each active edge of the Sample Clock. You can route the Sample ...
Page 79 - Pulse-Width Measurement
Chapter 7 Counters NI 6232/6233 User Manual 7-6 ni.com Pulse-Width Measurement In pulse-width measurements, the counter measures the width of a pulse on its Gate input signal. You can configure the counter to measure the width of high pulses or low pulses on the Gate signal. You can route an interna...
Page 80 - Period Measurement
Chapter 7 Counters © National Instruments Corporation 7-7 NI 6232/6233 User Manual Buffered Pulse-Width Measurement Buffered pulse-width measurement is similar to single pulse-width measurement, but buffered pulse-width measurement takes measurements over multiple pulses. The counter counts the numb...
Page 81 - Buffered Period Measurement
Chapter 7 Counters NI 6232/6233 User Manual 7-8 ni.com of rising (or falling) edges occurring on the Source input between the two active edges of the Gate signal. You can calculate the period of the Gate input by multiplying the period of the Source signal by the number of edges returned by the coun...
Page 82 - Semi-Period Measurement; Single Semi-Period Measurement
Chapter 7 Counters © National Instruments Corporation 7-9 NI 6232/6233 User Manual Figure 7-9. Buffered Period Measurement Note that if you are using an external signal as the Source, at least one Source pulse should occur between each active edge of the Gate signal. This condition ensures that corr...
Page 83 - Frequency Measurement
Chapter 7 Counters NI 6232/6233 User Manual 7-10 ni.com Buffered Semi-Period Measurement In buffered semi-period measurement, on each edge of the Gate signal, the counter stores the count in a hardware save register. A DMA controller transfers the stored values to host memory. The counter begins cou...
Page 87 - Choosing a Method for Measuring Frequency
Chapter 7 Counters NI 6232/6233 User Manual 7-14 ni.com Figure 7-14. Method 3 Then route the Counter 0 Internal Output signal to the Gate input of Counter 1. You can route a signal of known frequency (F2) to the Counter 1 Source input. F2 can be 80MHzTimebase. For signals that might be slower than 0...
Page 89 - Position Measurement; X1 Encoding
Chapter 7 Counters NI 6232/6233 User Manual 7-16 ni.com For information on connecting counter signals, refer to the Default Counter Terminals section. Position Measurement You can use the counters to perform position measurements with quadrature encoders or two-pulse encoders. You can measure angula...
Page 90 - X4 Encoding; Channel Z Behavior
Chapter 7 Counters © National Instruments Corporation 7-17 NI 6232/6233 User Manual Figure 7-15. X1 Encoding X2 Encoding The same behavior holds for X2 encoding except the counter increments or decrements on each edge of channel A, depending on which channel leads the other. Each cycle results in tw...
Page 92 - Single Two-Signal Edge-Separation Measurement
Chapter 7 Counters © National Instruments Corporation 7-19 NI 6232/6233 User Manual For information on connecting counter signals, refer to the Default Counter Terminals section. Two-Signal Edge-Separation Measurement Two-signal edge-separation measurement is similar to pulse-width measurement, exce...
Page 94 - Counter Output Applications; Simple Pulse Generation; Single Pulse Generation with Start Trigger
Chapter 7 Counters © National Instruments Corporation 7-21 NI 6232/6233 User Manual Counter Output Applications Simple Pulse Generation Single Pulse Generation The counter can output a single pulse. The pulse appears on the Counter n Internal Output signal of the counter. You can specify a delay fro...
Page 96 - Pulse Train Generation
Chapter 7 Counters © National Instruments Corporation 7-23 NI 6232/6233 User Manual Pulse Train Generation Continuous Pulse Train Generation This function generates a train of pulses with programmable frequency and duty cycle. The pulses appear on the Counter n Internal Output signal of the counter....
Page 97 - Frequency Generation
Chapter 7 Counters NI 6232/6233 User Manual 7-24 ni.com Frequency Generation You can generate a frequency by using a counter in pulse train generation mode or by using the frequency generator circuit. Using the Frequency Generator The frequency generator can output a square wave at many different fr...
Page 98 - Frequency Division; Pulse Generation for ETS
Chapter 7 Counters © National Instruments Corporation 7-25 NI 6232/6233 User Manual Frequency Output can be routed out to any output PFI <6..9> or RTSI <0..7> terminal. All PFI terminals are set to high-impedance at startup. In software, program the frequency generator as you would progr...
Page 99 - Counter Timing Signals
Chapter 7 Counters NI 6232/6233 User Manual 7-26 ni.com Nyquist frequency of the system. Figure 7-28 shows an example of pulse generation for ETS; the delay from the trigger to the pulse increases after each subsequent Gate active edge. Figure 7-28. Pulse Generation for ETS For information on connec...
Page 100 - Counter
Chapter 7 Counters © National Instruments Corporation 7-27 NI 6232/6233 User Manual Counter n Source Signal The selected edge of the Counter n Source signal increments and decrements the counter value depending on the application the counter is performing. Table 7-3 lists how this terminal is used i...
Page 104 - Routing Counter; Frequency Output Signal; Default Counter Terminals
Chapter 7 Counters © National Instruments Corporation 7-31 NI 6232/6233 User Manual Routing Counter n Internal Output to an Output Terminal You can route Counter n Internal Output to any output PFI <6..9> or RTSI <0..7> terminal. All output PFIs are set to high-impedance at startup. Freq...
Page 105 - Counter Triggering; Arm Start Trigger
Chapter 7 Counters NI 6232/6233 User Manual 7-32 ni.com You can use these defaults or select other sources and destinations for the counter/timer signals in NI-DAQmx. Refer to Connecting Counter Signals in the NI-DAQmx Help or the LabVIEW 8.x Help for more information on how to connect your signals ...
Page 106 - Other Counter Features; Cascading Counters; Counter Filters
Chapter 7 Counters © National Instruments Corporation 7-33 NI 6232/6233 User Manual Pause Trigger You can use pause triggers in edge counting and continuous pulse generation applications. For edge counting acquisitions, the counter stops counting edges while the external trigger signal is low and re...
Page 107 - Prescaling
Chapter 7 Counters NI 6232/6233 User Manual 7-34 ni.com The filter setting for each input can be configured independently. On power up, the filters are disabled. Figure 7-29 shows an example of a low-to-high transition on an input that has its filter set to 125 ns (N = 5). Figure 7-29. Filter Exampl...
Page 108 - Duplicate Count Prevention; Duplicate Count Prevention Example
Chapter 7 Counters © National Instruments Corporation 7-35 NI 6232/6233 User Manual prescaling on each counter (prescaling can be disabled). Each prescaler consists of a small, simple counter that counts to eight (or two) and rolls over. This counter can run faster than the larger counters, which si...
Page 109 - Duplicate Count Example
Chapter 7 Counters NI 6232/6233 User Manual 7-36 ni.com Figure 7-31. Duplicate Count Prevention Example On the first rising edge of the Gate, the current count of 7 is stored. On the next rising edge of the Gate, the counter stores a 2 since two Source pulses occurred after the previous rising edge ...
Page 110 - Example Application That Prevents Duplicate Count
Chapter 7 Counters © National Instruments Corporation 7-37 NI 6232/6233 User Manual Figure 7-32. Duplicate Count Example Example Application That Prevents Duplicate Count With duplicate count prevention enabled, the counter synchronizes both the Source and Gate signals to the 80 MHz Timebase. By syn...
Page 111 - When To Use Duplicate Count Prevention; Enabling Duplicate Count Prevention in NI-DAQmx
Chapter 7 Counters NI 6232/6233 User Manual 7-38 ni.com Normally, the counter value and Counter n Internal Output signals change synchronously to the Source signal. With duplicate count prevention, the counter value and Counter n Internal Output signals change synchronously to the 80 MHz Timebase. N...
Page 113 - External Source Mode
Chapter 7 Counters NI 6232/6233 User Manual 7-40 ni.com Other Internal Source Mode In other internal source mode, the device synchronizes signals on the falling edge of the source, and counts on the following rising edge of the source, as shown in Figure 7-35. Figure 7-35. Other Internal Source Mode...
Page 115 - Using PFI Terminals as Timing Input Signals
Chapter 8 PFI NI 6232/6233 User Manual 8-2 ni.com Figure 8-2. NI 6232/6233 PFI Output Circuitry When a terminal is used as a timing input or output signal, it is called PFI x (where x is an integer from 0 to 9). When a terminal is used as a static digital input or output, it is called P0. x or P1. x...
Page 116 - Exporting Timing Output Signals Using PFI Terminals; Using PFI Terminals as Static Digital Inputs and Outputs
Chapter 8 PFI © National Instruments Corporation 8-3 NI 6232/6233 User Manual Exporting Timing Output Signals Using PFI Terminals You can route any of the following timing signals to any PFI <6..9> terminal. • AI Hold Complete Event • Counter n Source • Counter n Gate • Counter n Internal Outp...
Page 117 - PFI Filters
Chapter 8 PFI NI 6232/6233 User Manual 8-4 ni.com Figure 8-3. PFI Input Signals Connections PFI Filters You can enable a programmable debouncing filter on each PFI, RTSI, or PXI_STAR signal. When the filters are enabled, your device samples the input on each rising edge of a filter clock. M Series d...
Page 122 - Isolation and Digital Isolators
© National Instruments Corporation 9-1 NI 6232/6233 User Manual 9 Isolation and Digital Isolators NI 6232/6233 devices are isolated data acquisition devices. As shown in Figure 9-1, the analog input, analog output, counters, and PFI/static DIO circuitry are referenced to an isolated ground . The bus...
Page 123 - Digital Isolation
Chapter 9 Isolation and Digital Isolators NI 6232/6233 User Manual 9-2 ni.com The non-isolated ground is connected to the chassis ground of the PC or chassis where the device is installed. The isolated ground is not connected to the chassis ground of the PC or chassis. The isolated ground can be at ...
Page 125 - 0 MHz Timebase
Chapter 10 Digital Routing and Clock Generation NI 6232/6233 User Manual 10-2 ni.com 80 MHz Timebase The 80 MHz Timebase can be used as the Source input to the 32-bit general-purpose counter/timers. The 80 MHz Timebase can be generated from either of the following. • Onboard oscillator • External si...
Page 126 - 0 MHz Reference Clock; Synchronizing Multiple Devices
Chapter 10 Digital Routing and Clock Generation © National Instruments Corporation 10-3 NI 6232/6233 User Manual 10 MHz Reference Clock The 10 MHz reference clock can be used to synchronize other devices to your M Series device. The 10 MHz reference clock can be routed to the RTSI <0..7> termi...
Page 128 - Using RTSI as Outputs
Chapter 10 Digital Routing and Clock Generation © National Instruments Corporation 10-5 NI 6232/6233 User Manual Using RTSI as Outputs RTSI <0..7> are bidirectional terminals. As an output, you can drive any of the following signals to any RTSI terminal. • ai/StartTrigger • ai/ReferenceTrigger...
Page 129 - Using RTSI Terminals as Timing Input Signals
Chapter 10 Digital Routing and Clock Generation NI 6232/6233 User Manual 10-6 ni.com Using RTSI Terminals as Timing Input Signals You can use RTSI terminals to route external timing signals to many different M Series functions. Each RTSI terminal can be routed to any of the following signals. • AI C...
Page 131 - PXI Clock and Trigger Signals; PXI Triggers
Chapter 10 Digital Routing and Clock Generation NI 6232/6233 User Manual 10-8 ni.com PXI Clock and Trigger Signals Note PXI clock and trigger signals are only available on PXI devices. Other devices use RTSI. PXI_CLK10 PXI_CLK10 is a common low-skew 10 MHz clock reference clock for synchronization o...
Page 134 - Bus Interface; DMA Controllers
© National Instruments Corporation 11-1 NI 6232/6233 User Manual 11 Bus Interface The bus interface circuitry of NI 6232/6233 devices efficiently moves data between host memory and the measurement and acquisition circuits. NI 6232/6233 devices are available for the following platforms. • PCI • PXI N...
Page 135 - PXI Considerations; PXI and PXI Express
Chapter 11 Bus Interface NI 6232/6233 User Manual 11-2 ni.com Each DMA controller supports packing and unpacking of data through the FIFOs to connect different size devices and optimize PCI bus utilization and automatically handles unaligned memory buffers. PXI Considerations Note PXI clock and trig...
Page 136 - Using PXI with CompactPCI; Data Transfer Methods
Chapter 11 Bus Interface © National Instruments Corporation 11-3 NI 6232/6233 User Manual Using PXI with CompactPCI Using PXI-compatible products with standard CompactPCI products is an important feature provided by PXI Hardware Specification Revision 2.1 . If you use a PXI-compatible plug-in module...
Page 137 - Changing Data Transfer Methods between DMA and IRQ
Chapter 11 Bus Interface NI 6232/6233 User Manual 11-4 ni.com Interrupt Request (IRQ) IRQ transfers rely on the CPU to service data transfer requests. The device notifies the CPU when it is ready to transfer data. The data transfer speed is tightly coupled to the rate at which the CPU can service th...
Page 138 - Triggering; Triggering with a Digital Source
© National Instruments Corporation 12-1 NI 6232/6233 User Manual 12 Triggering A trigger is a signal that causes an action, such as starting or stopping the acquisition of data. When you configure a trigger, you must decide how you want to produce the trigger and the action you want the trigger to c...
Page 142 - NI 6232 Accessory and Cabling Options; RTSI
Appendix A Device-Specific Information © National Instruments Corporation A-3 NI 6232/6233 User Manual Note For more information about default NI-DAQmx counter inputs, refer to Connecting Counter Signals in the NI-DAQmx Help or the LabVIEW 8.x Help . NI 6232 Specifications Refer to the NI 6232/6233 ...
Page 143 - Cables; Custom Cabling and Connectivity
Appendix A Device-Specific Information NI 6232/6233 User Manual A-4 ni.com vision, and motion devices. Since PXI devices use PXI backplane signals for timing and synchronization, no cables are required. Cables In most applications, you can use the following cables: • SH37F-37M- x —37-pin female-to-m...
Page 145 - NI 6233 Accessory and Cabling Options
Appendix A Device-Specific Information NI 6232/6233 User Manual A-6 ni.com Note For more information about default NI-DAQmx counter inputs, refer to Connecting Counter Signals in the NI-DAQmx Help or the LabVIEW 8.x Help . NI 6233 Specifications Refer to the NI 6233 Specifications , available on the...
Page 147 - Troubleshooting
© National Instruments Corporation B-1 NI 6232/6233 User Manual B Troubleshooting This section contains some common questions about M Series devices. If your questions are not answered here, refer to the National Instruments KnowledgeBase at ni.com/kb . It contains thousands of documents that answer...
Page 171 - Index; Symbols; Numerics
© National Instruments Corporation I-1 NI 6232/6233 User Manual Index Symbols .NET languages documentation, xviii Numerics 10 MHz reference clock, 10-3100 kHz Timebase, 10-220 MHz Timebase, 10-280 MHz source mode, 7-3980 MHz Timebase, 10-2 A A/D converter, 4-2accessories, 2-4, A-3, A-6 choosing for ...
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