National Instruments SCC-AI02 User's Manual
Contents
1. Signal SCC AIXX E Series DAQ Device Source 4 Lowpass Cf Filter nee 3 gt AISENSE AIGND 2 ww 4 Lowpass ACH X 8 Filter 1 e Figure 1 3 SCC AIXX Signal Connections The inputs are designed in a floating nonreferenced single ended configuration If the measured signals are floating connect the negative input pins 1 and 3 to AISENSE on the SC 2345 terminal block through a 10 KQ to 100 KQ resistor Figure 1 4 shows a floating signal connection on one channel of the SCC AIXX SCC AIXX E Series DAQ Device 4 Signal C T i Source owpass 4 Filter FER 3 s 10 100 kQ 3 m gt AISENSE AISENSE _ on SC 2345 ee terminal block 2 ww Lowpass _ ACH X 8 Filter 1 e Figure 1 4 Nonreferenced Signal Connection for the SCC AIXX One Channel SCC AI Series Isolated Analog Input Modules 6 ni com If a high common mode voltage is present connect the negative input pins 1 and 3 to the signal reference Figure 1 5 shows a ground referenced signal connection on one channel of the SCC AIXX Signal High CMV Source SCC AIXX E Series DAQ Device 4 WW Lowpass gt Filter P ACH eo 3 o C gt AISENSE T aie AIGND TT 2 v Lowpass gt ACH X 8 Filter Figure 1 5 Grou2. 2345 User Manual for more information on configuring connecting and installing SCC modules SCC AI Series Isolated Analog Input Modules 4 ni com Connecting the Input Signals The SCC AIXX has a fixed screw terminal receptacle and a removable screw terminal block as shown in Figure 1 2 1 SCC Screw Terminal Receptacle 2 Removable Screw Terminal Block Figure 1 2 SCC AIXX Two Part Screw Terminal System After you install the SCC AIXX connect the input signals to the removable screw terminal block of the module 1 Remove power from the signal lines 2 Strip 7 mm of insulation from the ends of the signal wires 3 Insert the wires into the screw terminals 4 Tighten the screws to 0 5 to 0 6 N m 4 4 to 5 3 Ib in of torque Each screw terminal is labeled by pin number lt 1 4 gt Pins 1 and 2 form a channel routed to E Series DAQ device channel X 8 and pins 3 and 4 form a channel routed to the E Series DAQ device channel X where X is 0 to 7 depending on the socket where you plug in the module The SCC AIXX provides channel to ground and module to module isolation only It does not provide isolation between the two channels of the SCC AIXX Because both channels must have the same reference voltage pins 1 and 3 are connected together internally Figure 1 3 shows the SCC AIXX signal connections National Instruments Corporation 5 SCC AI Series Isolated Analog Input Modules
3. company names mentioned herein are trademarks or trade names of their respective companies For patents covering National Instruments products refer to the appropriate location Help Patents in your software the patents txt file on your CD orni com patents pz R j ee 371066A 01 Sep03 2002 2003 National Instruments Corp All rights reserved
4. value shown in Table 1 3 in this example the value is 8 V using an SCC AI03 For example assume that you have an SCC AI03 module You first connect 8 VDC to the input of CH X The E Series DAQ device reads 8 05 V as the SCC output You then connect 0 VDC to the input of CH X and the E Series DAQ device reads 0 01 V as the SCC output You subtract these readings 8 05 0 01 8 06 getting a difference of 8 06 V Because this difference is not equal to 8 V you must adjust the gain trimpot and repeat the procedure until the difference in outputs equals 8 V Sy Note In this example there can be an offset voltage such that the final readings are 8 01 V and 0 01 V for a difference of 8 V The gain trimpot adjusted in step 9 of the previous procedure adjusts only for gain errors and does not compensate for this offset voltage Complete the following steps to adjust the offset voltage of the SCC AIXX 1 2 National Instruments Corporation Select the desired SCC AIXX channel on the E Series DAQ device Set the gain on the E Series DAQ device so that the input range is 10 V Connect the screw terminals of your desired channel on the SCC AIXX together Using your software have the E Series DAQ device read the channel If the value read is not equal to 0 00 V adjust the appropriate trimpot located on the top of the SCC AIXX labeled Offset Turn the trimpot clockwise to increase the offset Repeat steps 4 and 5 until
5. Rs USER GUIDE SCC AI Series Isolated Analog Input Modules The SCC AI Series isolated analog input modules SCC AIXX can extract a relatively low amplitude input signal from a high common mode voltage so the E Series DAQ device can measure the input signal They also can amplify and filter the input signal resulting in higher measurement resolution and accuracy SCC AIXX modules are available in a range of gains from 0 2 to 200 They contain lowpass filters of either 10 kHz or 4 Hz bandwidth Table 1 1 gives the gain and bandwidth for each module Table 1 1 SCC AIXX Module Input Output Range Gain and Bandwidth Model Input Range Output Range Gain Bandwidth SCC AI01 42 V 8 4 V 0 2 10 kHz SCC AI02 20 V 10 V 0 5 10 kHz SCC AI03 10 V 10 V 1 10 kHz SCC AI04 5 V 10 V 2 10 kHz SCC AI05 1 V 10 V 10 10 kHz SCC AI06 100 mV 10 V 100 10 kHz SCC AI07 50 mV 10 V 200 10 kHz SCC AI13 10 V 10 V 1 4 Hz SCC AI14 5 V 10 V 2 4 Hz N NATIONAL gt INSTRUMENTS Conventions The following conventions are used in this guide lt gt Angle brackets that contain numbers separated by an ellipsis represent a range of values associated with a bit or signal name for example ai lt 0 7 gt 3 This icon denotes a note which alerts you to important information A This icon denotes a caution which advises you of precautions to take to avoid injury data loss or a system cr
6. WRO2 and the PSO1 power supply SCC PWRO3 requires a 7 to 42 VDC power supply not included SCC AI Series Isolated Analog Input Modules 2 ni com One or more SCC SGXX SCC SG Series Strain Gauge Modules User Guide SC 2345 User Manual Read Me First Safety and Radio Frequency Interference SC 2345 Quick Reference Label Ooovovo 0 68 pin Basic or E Series DAQ device documentation and 68 pin cable 1 8 in flathead screwdriver Numbers 1 and 2 Phillips screwdrivers Wire insulation strippers Coo wv NI DAQ current version for Windows 2000 NT XP Me Sy Note Software scaling of measurements is not supported on the Macintosh operating system Refer to the Scaling Voltage Measurements section Unpacking the Module SCC modules are shipped in antistatic envelopes to prevent electrostatic damage ESD to the modules ESD can damage several components on these products A Caution Never touch the exposed pins of connectors To avoid damage from ESD when you handle the module take the following precautions e Ground yourself by using a grounding strap or by touching a grounded object e Touch the antistatic envelope to a metal part of the computer chassis before removing the module from the envelope Remove the module from the envelope and inspect the module for loose components or any sign of damage Notify NI if the module appears damaged in any way Do not install a damaged module Store the module in the ant
7. alculated relative to the input range of the module National Instruments Corporation 11 SCC AI Series Isolated Analog Input Modules Filter Characteristics Number of poles Rolloff Cutoff frequency 3 dB Physical DIMENSIONS ccccceeeccecceesceeeeeeeeseeeeeeees T O connectors Screw terminal wire gauge Maximum Working Voltage Maximum working voltage refers to the common mode voltage Channel to earth Module to module Channel to channel The SCC AIXX does not provide isolation between the two channels of the modul refer to the Connecting the Input Signals section SCC AI Series Isolated Analog Input Modules 519 mW max 34 6 mA max 34 6 mA max 625 mW max 125 mA max 8 89 cm by 2 92 cm by 1 85 cm 3 5 in by 1 15 in by 0 73 in One 20 pin right angle male connector one 4 pin screw terminal removable 24 to 12 AWG signal voltage plus the 300 V Installation Category II 300 V Installation Category II Not isolated e For more information on this topic ni com Environmental Operating temperature 0 to 50 C Storage temperature eee 20 to 70 C PAU ditty 25 20 hits 10 to 90 RH noncondensing Maximum altitude 2 000 meters Pollution Degree indoor use only 2 Safety The SCC AIXX meets the requirements of the following standards for safety and electrical equipment for measurement control and laboratory use e IEC 61010 1 EN 61010 1
8. apable of providing the DC voltage shown in Table 1 3 Table 1 3 SCC AIXX Input Voltage Requirements Module Input Range SCC AI01 40 V SCC AI02 16 V SCC A103 8V SCC AI04 4V SCC AI05 800 mV SCC AI06 80 mV SCC AI07 40 mV SCC AI13 8V SCC AI14 4V To adjust the gain of the SCC AIXX complete the following steps l 2 3 Select the desired SCC AIXX channel on the E Series DAQ device Set the gain on the E Series DAQ device so that its input range is 10 V Connect the voltage source to the screw terminals of the desired channel on the SCC AIXX Apply the voltage given in Table 1 3 that corresponds to the SCC AIXX module For example if you have an SCC AI03 you must apply 8 VDC Using your software have the E Series DAQ device read the desired channel on the SCC AIXX and record the value Input 0 VDC to the SCC AIXX Use the E Series DAQ device to read that channel and record the value Subtract the values read first reading second reading SCC AI Series Isolated Analog Input Modules 14 ni com Adjust the trimpot labeled Gain located on the top of the SCC AIXX If the value you obtained in step 8 is less than the input voltage turn the trimpot clockwise to increase the gain If it is greater than the input voltage turn the trimpot counterclockwise to decrease the gain Repeat steps 4 through 9 until the difference you get in step 8 equals the Input Voltage Required
9. ash When this symbol is marked on the product refer to the Read Me First Safety and Radio Frequency Interference document shipped with the product for precautions to take A When symbol is marked on a product it denotes a warning advising you to take precautions to avoid electrical shock AN When symbol is marked on a product it denotes a component that may be hot Touching this component may result in bodily injury bold Bold text denotes items that you must select in the software such as menu items and dialog box options Bold text also denotes parameter names italic Italic text denotes variables emphasis a cross reference or an introduction to a key concept This font also denotes text that is a placeholder for a word or value that you must supply 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 subprograms subroutines device names functions operations variables filenames and extensions and code excerpts SC 2345 SC 2345 refers to both the SC 2345 connector block and the SC 2345 configurable connector SCC SCC refers to any SCC series signal conditioning module What You Need to Get Started To set up and use the SCC AIXX you need the following items Q SC 2345 with one of the following SCC PWROI SCC P
10. e UL3111 1 UL 61010B 1 e CAN CSA C22 2 No 1010 1 3 Note For UL and other safety certifications refer to the product label or visit ni com hardref nsf search by model number or product line and click the appropriate link in the Certification column Electromagnetic Compatibility Emissions cccccecesccscecccceecsesceceseeseeeeees EN 55011 Class A at 10 m FCC Part 15A above 1 GHz TATA aces cs nes ea cats adeaves vad EEE Evaluated to EN 61326 1997 A2 2001 Table 1 CE C Tick and FCC Part 15 Class A Compliant 3 Note For full EMC compliance you must operate this device with shielded cabling In addition all covers and filler panels must be installed CE Compliance The SCC AIXX meets the essential requirements of applicable European Directives as amended for CE marking as follows Ss Note Refer to the Declaration of Conformity DoC for this product for any additional regulatory compliance information To obtain the DoC for this product visit ni com hardref nsf search by model number or product line and click the appropriate link in the Certification column National Instruments Corporation 13 SCC AI Series Isolated Analog Input Modules Calibrating Gain and Offset Errors The SCC AIXX is calibrated at the factory before shipment If you want to adjust the gain of the SCC AIXX in your system using your E Series DAQ device you need a voltage source that is several times more accurate than the SCC itself and c
11. e configuration process and close MAX 3 Note Configuring the SCC system using MAX automatically sets the E Series DAQ device analog input mode to nonreferenced single ended NRSE Virtual Channels Physical Channels and Tasks After you have installed and configured your SCC hardware you can use software tools within MAX to further configure the module and take measurements Creating an NI DAQmx Task or Global Channel To create an NI DAQmx task or global channel complete the following steps 1 Open Measurement amp Automation Explorer 2 Right click Data Neighborhood and select Create New 3 Select NI DAQmx Task or NI DAQmx Global Channel and click Next 4 Select Analog Input and then select Voltage If you are creating a task select the channels to add to the task You can select blocks of channels by pressing the lt Shift gt key while making the selections or select individual channels by pressing the lt Ctrl gt key while making the selections If you are creating a channel you can select only one channel Click Next 6 Enter a name for the task or global channel and click Finish 7 Inthe Channel List box select the channel s you want to configure You can select blocks of channels by pressing the lt Shift gt key while making the selections or select individual channels by pressing the lt Ctrl gt key while making the selections 8 Enter the specific values for your application in the Settings tab Na
12. istatic envelope when it is not in use National Instruments Corporation 3 SCC AI Series Isolated Analog Input Modules Installing the Module A Caution Refer to the Read Me First Safety and Radio Frequency Interference document before removing equipment covers or connecting disconnecting any signal wires A blue label stripe identifies the SCC AIXX as an analog input module The label also displays the icon shown in Figure 1 1 Figure 1 1 SCC AIXX Icon You can plug the SCC AIXX into any analog input socket on the SC 2345 The socket you choose determines which E Series DAQ device channels receive the SCC AIXX signals For single stage input conditioning plug the SCC AIXX into any socket J X 1 where X is 0 to 7 and connect the input signals to the module as described in the Connecting the Input Signals section If you use the SCC AIXX in a dual stage configuration the SCC AIXX must be the first stage module Plug it into any socket J X 9 and plug the second stage SCC into socket J X 1 where X is 0 to 7 Connect the input signals to the SCC AIXX as described in the Connecting the Input Signals section The SC 2345 connects the output signals of the first stage SCC to the inputs of the second stage SCC An example of dual stage conditioning is an SCC AI02 followed by an SCC FVO1 frequency input module Sockets J9 to J16 are also available for digital input output DIO conditioning or control Refer to the SC
13. nd Referenced Signal Connection for the SCC AIXX with High Common Mode Voltage One Channel Configuring the SCC System Measurement amp Automation Explorer MAX Configuration National Instruments Corporation 7 Run MAX to configure the SCC system Complete one of the following sets of steps depending on the version of NI DAQ used in your application NI DAQmx Complete the following steps to configure the SCC AI module using NI DAQmx 1 Open Measurement amp Automation Explorer 2 Right click Devices and Interfaces and select Create New 3 Under NI DAQmx SCC Connector Block select SC 2345 Click Finish SCC AI Series Isolated Analog Input Modules D In the SCC Connector Block Configuration window configure the SCC system as follows a Specify the SCC Carrier Type The location of the SCC sockets change depending on the SCC carrier type b Select the DAQ Device that is connected to the SC 2345 c Type the SCC Connector Block ID The default value is SCC1 d Inthe J21 drop down list next to Power select the correct SC 2345 power configuration Refer to the SC 2345 User Manual for information on power configurations e For each SCC module physically installed in the SC 2345 add a corresponding entry in the SC 2345 configuration window To add the SCC click the socket drop down list and select the correct module If the module name does not appear in the list either the module is not allowed in that l
14. ni com Scaling Voltage Measurements If you configured the SCC AIXX using MAX and you are using NI DAQ the voltage reading you get from the E Series DAQ device accounts for the voltage scaling effect of the SCC AIXX Otherwise since the voltage measurement from the E Series DAQ device is scaled by the gain given in Table 1 1 you must divide the voltage reading returned by the E Series DAQ device by this gain to get the correct input voltage Specifications These ratings are typical at 25 C unless otherwise stated Input Characteristics Number of input channels 2 NRSE Isolation Bank isolation isolation per module Input output signal range gain and bandwidth ecceseeeseeeeeeeeteeeeeeee Refer to Table 1 1 Input impedance SCC AIO1 SCC AI02 wo 1MQ AN OUNGTS sine sent 100 MQ Gain error 4 5 max trimmable to zero Gain stability 150 PPM C Offset error ccccescscescseeseseesessesesseseneeees 40 mV max RTI Offset stability 225 uV C Nonlinearity 0 0128 typ 0 0260 max Common mode rejection ratio 0 0 0 0 100 dB typical at 60 Hz Output slew rate dependent on BW filtering 0 000 0 8 V us max 1 The SCC AIXX does not provide isolation between the two channels of the module For more information on this topic refer to the Connecting the Input Signals section 2 This specification is c
15. ocation or you do not have the current version of NI DAQ If you do not have the current version of NI DAQ download it from ni com f Click OK after completing all SCC entries to complete the configuration process Close MAX 3 Note Configuring the SCC system using MAX automatically sets the E Series DAQ device analog input mode to nonreferenced single ended NRSE Traditional NI DAQ Complete the following steps to configure the SCC AI module using Traditional NI DAQ 1 2 3 4 mi Open Measurement amp Automation Explorer Expand Devices and Interfaces Expand Traditional NI DAQ Devices Right click the E Series DAQ device connected to the SC 2345 and select Properties Select the Accessory tab Under Accessory select SC 2345 Click the Configure button A new window appears listing the sockets connector reference designators of the SC 2345 Select the SC 2345 socket where you installed an SCC Click Add and select the SCC you installed If the module name does not appear in the list either the module is not allowed in that location or you do not have the current version of NI DAQ If you do not have the current version of NI DAQ download it from ni com SCC AI Series Isolated Analog Input Modules 8 ni com If you make a selection mistake select the socket and click Remove Repeat steps 8 and 9 for each newly installed SCC Click OK after completing all SCC entries Click OK to complete th
16. the voltage read in step 4 equals 0 00 V 15 SCC Al Series Isolated Analog Input Modules SCC AIXX Module Pin Assignments Figure 1 6 shows the I O connector pins on the bottom of the module 1 Pini 2 Pin2 3 PWB Key 4 Pin19 5 Pin 20 Figure 1 6 SCC Module Bottom View Table 1 4 lists the signal corresponding to each I O connector pin on the bottom of the SCC AIXX ACH X and ACH X 8 are the analog input channels of the E Series DAQ device AIGND is the analog input ground signal and is the reference for ACH X and ACH X 8 AGND is the reference for the 15 V supplies and REF5V AIGND and AGND connect to the SC 2345 at the SCC PWR connector GND is the reference for the 5 V supply Table 1 4 SCC AIXX Module Pin Assignments Pin Number Signal 1 E Series ACH X 2 E Series AIGND 3 Z 4 E Series ACH X 8 5 6 E Series AIGND 7 8 E Series AIGND SCC AI Series Isolated Analog Input Modules 16 ni com Table 1 4 SCC AIXX Module Pin Assignments Continued Pin Number Signal 9 6 V 10 GND 11 AGND 12 REF5V 13 15 V 14 15 V 15 16 17 18 19 20 National Instruments Corporation 17 SCC AI Series Isolated Analog Input Modules National Instruments NI ni com and NI DAQ are trademarks of National Instruments Corporation Product and
17. tional Instruments Corporation Context help information for each setting is provided on the right side of the screen 9 SCC AI Series Isolated Analog Input Modules Table 1 2 shows suggested values for some of the parameters Use default values for parameters not shown Table 1 2 SCC AIXX Suggested Values Module Input Range SCC AI01 42 V SCC AI02 20 V SCC AI03 10 V SCC AI04 5 V SCC AIO5 1V SCC AI06 100 mV SCC AI07 50 mV SCC AI13 10 V SCC AI14 5 V 9 Click Test to test the channel You should be able to view your measurement in the window that appears You have finished configuring the NI DAQmx task or global channel Creating a Virtual Channel in Traditional NI DAQ To create a Traditional NI DAQ virtual channel complete the following steps RENE OR Oe E 8 Open Measurement amp Automation Explorer Right click Data Neighborhood and select Create New Select Traditional NI DAQ Virtual Channel and click Finish Click Next to select Analog Input as the type of channel to configure Select Voltage from the drop down list and click Next Enter the rest of the values as they apply to your setup and click Next On the next screen specify information about the E Series DAQ device being used and click Finish To test the channel click Test You have finished configuring the Traditional NI DAQ virtual channel SCC AI Series Isolated Analog Input Modules 10
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