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SCC-AI Series Isolated Analog Input Modules User Guide

1. for more information about configuring connecting and installing SCC modules SCC Al Series Isolated Analog Input Modules User Guide 4 ni com Connecting the Input Signals 3 Note The signal names have changed Refer to ni com info and enter rdtntg to confirm the signal names Each screw terminal on the SCC AI is labeled by pin number lt 1 4 gt Pins 1 and 2 form a channel routed to E M Series DAQ device channel X 8 and pins 3 and 4 form a channel routed to the E M Series DAQ device channel X where X is 0 to 7 depending on the socket where you plug in the module The SCC AI provides channel to ground and module to module isolation only It does not provide isolation between the two channels of the SCC AI Because both channels must have the same reference voltage pins 1 and 3 are connected together internally Figure 1 shows the SCC AI signal connections E M Series DAQ Device Signal SCC Al Source 4 2 l Lowpass gt Filter PAIR 3 e gt Al SENSE m Al GND 2 VW Lowpass p al X 8 Filter 1 g Figure 1 SCC AI 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 AI SENSE on the SC 2345 2350 terminal block or AI GND on the SC 68 through a 10 kQ to 100 kQ resistor Figure 2 shows a
2. directs you to pull down the File menu select the Page Setup item and select Options from the last dialog box This icon denotes a note which alerts you to important information This icon denotes a caution which advises you of precautions to take to avoid injury data loss or a system crash 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 When symbol is marked on a product it denotes a warning advising you to take precautions to avoid electrical shock When symbol is marked on a product it denotes a component that may be hot Touching this component may result in bodily injury 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 text denotes variables emphasis a cross reference or an introduction to a key concept Italic text also denotes text that is a placeholder for a word or value that you must supply 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 SC 2345 refers to both the SC 2345 connector block and the SC 2345 co
3. floating signal connection on one channel of the SCC AI National Instruments Corporation 5 SCC Al Series Isolated Analog Input Modules User Guide SCC AI E M Series DAQ Device 4 VWW Signal Source owpass p D Filter ALX 3 10 to 100 kQ gt Al SENSE Al SENSE on Ne gt SC 2345 2350 ALGND terminal block V or 2 Al GND on SCC 68 Lowpass _ Al x18 Filter 1 Figure 2 Nonreferenced Signal Connection for the SCC AI One Channel If a high common mode voltage is present connect the negative input pins 1 and 3 to the signal reference Figure 3 shows a ground referenced signal connection on one channel of the SCC AI SCC AI E M Series DAQ Device 4 Wwv Signal C i A Source owpass D Filter mA 3 i C gt Al SENSE e AI GND 77 V Lowpass Al X 8 Filter 1 Figure 3 Ground Referenced Signal Connection for the SCC Al with High Common Mode Voltage One Channel For information about how to configure the SCC AI module using NI DAQmx refer to the SCC Quick Start Guide SCC AI Series Isolated Analog Input Modules User Guide 6 ni com Using the SCC Al when Scaling Voltage Measurements If you configured the SCC AI using Measurement amp Automation Explorer MAX and you are using NI DAQmx the voltage reading you get from t
4. A USER GUIDE SCC AI Series Isolated Analog Input Modules The SCC AI Series isolated analog input modules can extract a relatively low amplitude input signal from a high common mode voltage so the E M 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 AI Series 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 gives the gain and bandwidth for each module Table 1 SCC AI Module Input Output Range Gain and Bandwidth Model Input Range Output Range Gain Bandwidth SCC AI01 42 Vpk VDC 8 4 V 0 2 10 kHz SCC A102 20 V 10 V 0 5 10 kHz SCC A103 10 V 10 V 1 10 kHz SCC AI04 5 V 10 V 2 10 kHz SCC AI05 1V 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 D A NATIONAL p INSTRUMENTS Conventions gt g bold italic monospace SC 2345 SCC SCC AI The following conventions are used in this guide 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 The symbol leads you through nested menu items and dialog box options to a final action The sequence File Page Setup Options
5. For general SCC module installation and signal connection information and information about the SC 2345 2350 or SCC 68 refer to the SCC Quick Start Guide available for download at ni com manuals Installing the Module UN Caution Refer to the Read Me First Safety and Radio Frequency Interference document before removing equipment covers or connecting disconnecting any signal wires You can plug the SCC AI into any analog input socket on the SC 2345 2350 or SCC 68 The socket you choose determines which E M Series DAQ device channels receive the SCC AI signals For single stage input conditioning plug the SCC AI into any slot of the SC 68 or any socket of the SC 2345 2350 J X 1 where X is 0 to 7 Connect the input signals to the module as described in the Connecting the Input Signals section If you use the SCC AI in a dual stage configuration in an SC 2345 the SCC AI 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 AI 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 of the SC 2345 are also available for digital input output DIO conditioning or control Refer to the SC 2345 2350 User Manual
6. M Series DAQ device read the desired channel on the SCC AI and record the value Input 0 VDC to the SCC AI Use the E M Series DAQ device to read that channel and record the value Subtract the values read first reading second reading 9 Adjust the trimpot labeled Gain located on the top of the SCC AL 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 10 Repeat steps 4 through 9 until the difference you get in step 8 equals the Input Voltage Required value shown in Table 2 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 M 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 M 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 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 off
7. Output slew rate dependent on BW filtering 0 8 V us max Filter Characteristics Number of poles 3 RONO E sisri aes aa aa 60 dB decade Cutoff frequency 3 dB The SCC AI does not provide isolation between the two channels of the module For more information refer to the Connecting the Input Signals section 2 This specification is calculated relative to the input range of the module National Instruments Corporation 9 SCC Al Series Isolated Analog Input Modules User Guide Power Requirement Analog POWED 0 0 eeeeeeeeseeeeeseeseeeeeeees 410 mW max PLIN eiia a a 13 67 mA max ID V neea a E n S 13 67 mA max Digital power 5 V neeesser 650 mW max 130 mA max Physical 1 87 cm 0 74in 7 93 cm i o Poos 3 12 in gt Figure 4 SCC AI Dimensions BAE Td ai E E E EE E 37 g 1 0 oz W O CONNECtOTS sissisiiisinessesrceersisreisineisirs One 20 pin right angle male connector one 4 pin screw terminal removable Screw terminal wire gauge ee 24 to 12 AWG Maximum Working Voltage Maximum working voltage refers to the signal voltage plus the common mode voltage Channel to earth inputs 42 4 V peak Or 60 VDC Measurement Category I UN Caution This device is rated for Measurement Category I and is intended to carry signal voltages no greater than 42 4 V peak or 60 VDC Do not use this device for connection to signals or for measurements withi
8. e Connecting the Input Signals section National Instruments Corporation 11 SCC AI Series Isolated Analog Input Modules User Guide 3 3 3 CE Compliance C Note For the standards applied to assess the EMC of this product refer to the Online Product Certification section Note For EMC compliance operate this product according to the documentation Note For EMC compliance operate this device with shielded cables This product meets the essential requirements of applicable European Directives as follows e 2006 95 EC Low Voltage Directive safety e 2004 108 EC Electromagnetic Compatibility Directive EMC Online Product Certification Refer to the product Declaration of Conformity DoC for additional regulatory compliance information To obtain product certifications and the DoC for this product visit ni com certification search by model number or product line and click the appropriate link in the Certification column Environmental Management Ix NI is committed to designing and manufacturing products in an environmentally responsible manner NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers For additional environmental information refer to the NI and the Environment Web page at ni com environment This page contains the environmental regulations and directives with which NI complies as well as other environmental informati
9. he E M Series DAQ device accounts for the voltage scaling effect of the SCC AI Otherwise because the voltage measurement from the E M Series DAQ device is scaled by the gain given in Table 1 you must divide the voltage reading returned by the E M Series DAQ device by this gain to get the correct input voltage Calibrating Gain and Offset Errors The SCC AI is calibrated at the factory before shipment If you want to adjust the gain of the SCC AI in your system using your E M Series DAQ device you need a voltage source that is several times more accurate than the SCC itself and capable of providing the DC voltage shown in Table 2 Table 2 SCC AI Input Voltage Requirements Module Input Range SCC AIO1 40 V SCC AI02 16 V SCC AI03 8V SCC AI04 4V SCC AIO5 800 mV SCC AI06 80 mV SCC AI07 40 mV SCC AI13 8V SCC AI14 4V Gain Adjustment To adjust the gain of the SCC AI complete the following steps 1 Select the desired SCC AI channel on the E M Series DAQ device 2 Set the gain on the E M Series DAQ device so that its input range is 10 V 3 Connect the voltage source to the screw terminals of the desired channel on the SCC AI 4 Apply the voltage given in Table 2 that corresponds to the SCC AI module For example if you have an SCC AIO3 you must apply 8 VDC National Instruments Corporation 7 SCC AI Series Isolated Analog Input Modules User Guide 5 Using your software have the E
10. ignments Pin Number Signal 1 E M Series AI X 2 E M Series AI GND 3 4 E M Series AI X 8 5 _ 6 E M Series AI GND 7 8 E M Series AI GND 9 5 V 10 GND 11 A GND 12 REF 5 V 13 15 V 14 15 V 15 _ 16 17 18 19 20 National Instruments NI ni com and LabVIEW are trademarks of National Instruments Corporation Refer to the Terms of Use section on ni com lega1 for more information about National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies For patents covering National Instruments products technology refer to the appropriate location Help Patents in your software the patents txt file on your media or the National Instruments Patent Notice at ni com patents 2002 2008 National Instruments Corporation All rights reserved 371066D 01 Aug08
11. n Categories II HI or IV SCC AI Series Isolated Analog Input Modules User Guide 10 ni com Isolation Voltage Channel to earth isolation Continuous cccceceeeeseseeeeeeeeeees 60 VDC Measurement Category I Withstand oi iseciissanivnessceteeeienteatens 2300 Vms Verified by a 5 s dielectric withstand type test Channel to channel 0 eee eee Nonisolated Environmental Operating temperature 0 to 50 C Storage temperature 0 eee 20 to 70 C PLUM ditya nr nr 10 to 90 RH noncondensing Maximum altitude cccceceeeeeeeeeeee 2 000 m Pollution Degree indoor use only 2 Safety This product meets the requirements of the following standards of safety for electrical equipment for measurement control and laboratory use e TEC 61010 1 EN 61010 1 e UL61010 1 CSA 61010 1 3 Note For UL and other safety certifications refer to the product label or the Online Product Certification section Electromagnetic Compatibility This product meets the requirements of the following EMC standards for electrical equipment for measurement control and laboratory use e EN 61326 IEC 61326 Class A emissions Basic immunity e EN 55011 CISPR 11 Group 1 Class A emissions e AS NZS CISPR 11 Group 1 Class A emissions e FCC 47 CFR Part 15B Class A emissions e ICES 001 Class A emissions 1 The SCC AI does not provide isolation between the two channels of the module For more information refer to th
12. nfigurable connector SCC refers to any SCC series signal conditioning module SCC AI refers to any isolated analog input module in the SCC AI Series unless otherwise noted SCC AI Series Isolated Analog Input Modules User Guide 2 ni com What You Need to Get Started To set up and use the SCC AI you need the following items CL Hardware SCC 68 or SC 2345 2350 with one of the following e SCC PWRO1 e SCC PWR02 and the PSO1 power supply e SCC PWR03 requires a 7 to 42 VDC power supply not included One or more SCC AIT 68 pin E M Series DAQ device 68 pin cable Quick Reference Label L Software The latest version of NI DAQmx Q Documentation SCC AI Series Isolated Analog Input Modules User Guide SC 2345 2350 User Manual SCC 68 User Guide or SCC Quick Start Guide Read Me First Safety and Radio Frequency Interference Documentation for your hardware Documentation for your software L Tools 1 8 in flathead screwdriver Numbers 1 and 2 Phillips screwdrivers Wire insulation stripper 3 Note Software scaling of measurements is not supported on the Macintosh operating system Refer to the SCC AI Module Pin Assignments section National Instruments Corporation 3 SCC Al Series Isolated Analog Input Modules User Guide You can download NI documents from ni com manuals To download the latest version of NI DAQmx click Download Software at ni com Device Specific Information 3 Note
13. on not included in this document Waste Electrical and Electronic Equipment WEEE EU Customers At the end of the life cycle all products must be sent to a WEEE recycling center For more information about WEEE recycling centers and National Instruments WEEE initiatives visit ni com environment weee BFS mS Risk SEE HE ROHS HAAA National Instruments 444 E e TR Ar PE ES ROHS KF National Instruments FEl ROHS AWISE Tes ni com environment rohs_china For information about China RoHS compliance go to ni com environment rohs_china SCC AI Series Isolated Analog Input Modules User Guide 12 ni com SCC Al Module Pin Assignments Figure 5 shows the I O connector pins on the bottom of the module 1 Pin 1 2 Pin2 3 PWB Key 4 Pin19 5 Pin 20 Figure 5 SCC Module Bottom View Table 3 lists the signal corresponding to each I O connector pin on the bottom of the SCC AI AI X and AI X 8 are the analog input channels of the E M Series DAQ device AI GND is the analog input ground signal and is the reference for AI X and AI X 8 A GND is the reference for the 15 V supplies and REF 5 V AI GND and A GND connect to the SC 2345 2350 at the SCC PWR connector GND is the reference for the 5 V supply National Instruments Corporation 13 SCC AI Series Isolated Analog Input Modules User Guide Table 3 SCC Al Module Pin Ass
14. set voltage Offset Voltage Adjustment Complete the following steps to adjust the offset voltage of the SCC AI 1 Select the desired SCC AI channel on the E M Series DAQ device 2 Set the gain on the E M Series DAQ device so that the input range is 10 V 3 Connect the screw terminals of your desired channel on the SCC AI together 4 Using your software have the E M Series DAQ device read the channel 5 If the value read is not equal to 0 00 V adjust the appropriate trimpot located on the top of the SCC AI labeled Offset Turn the trimpot clockwise to increase the offset 6 Repeat steps 4 and 5 until the voltage read in step 4 equals 0 00 V SCC AI Series Isolated Analog Input Modules User Guide 8 ni com Specifications These ratings are typical at 25 C unless otherwise stated Input Characteristics Number of input channels 2 NRSE TSO at OM innn S Bank isolation isolation per module Input output signal range gain and bandwidth 0 ee eeeeeseeeeteeeneeeeeees Refer to Table 1 Input impedance SCC AIO1 SCC AI02 oo 1 MQ All others eee eeeeseeseeeneeeeees 100 MQ Gal ETTO s54 dsccdehesei i Ere Er r 4 5 max trimmable to zero Gain stability ciinii 150 PPM C Offset eofn eeviies Seapets 40 mV max RTI Offset stability eseeeeeeeeeteeeeees 225 wVv C NonlinGatity 5 es ecescvaitiede nar 0 0128 typ 0 0260 max Common mode rejection ratio 100 dB typical at 60 Hz

SCC-AI Series Isolated Analog Input Modules User Guide

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