Manual - National Instruments
Contents
1. and LabVIEW are trademarks of National Instruments Corporation Refer to the Terms of Use section on ni com 1legal 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 refer to the appropriate location Help Patents in your software the patents txt file on your media or ni com patents 2007 2008 National Instruments Corporation All rights reserved 374636B 01 Jul082. Or 5 VDC 1 1 2 2 5 V peak Or 2 5 VDC 2 1 2 5 2 V peak Or 2 VDC 250 0 01 5 1 Vpeak Or 1 VDC 5 1 10 500 mV peak or 500 mVDC 10 1 20 250 mV peax OF 250 mVDC 20 1 50 100 MV peax or 100 mVDC 50 1 100 50 mV peak Or 50 mVDC 100 1 200 25 mV peak or 25 mVDC 200 1 250 20 mV peak Or 20 mVDC 250 1 National Instruments Corporation 5 SCXI 1313A Terminal Block Installation Guide Table 1 Input Signal Range Versus Gain Continued Overall Module Terminal Gain Overall Voltage Range Gain Block Gain 500 10 MV eax Or 10 mVDC 500 1 1000 5 MV peak Or 5 mVDC 1000 1 2000 2 5 MV peax Or 2 5 mVDC 2000 1 1 Refer to the Specifications section for the input range Calibrating the Terminal Block Most external calibration documents for SCXI product are available to download from ni com calibration by clicking Manual Calibration Procedures For external calibration of products not listed there Basic Calibration Service or Detailed Calibration Service is recommended You can get information about both of these calibration services at ni com calibration NI recommends performing an external calibration once a year Temperature Sensor Output and Accuracy The SCXI 1313A temperature sensor outputs 1 91 to 0 65 V from 0 to 50 C Converting a Thermistor Voltage to a Temperature NI software can convert a thermistor voltage to the thermistor temperature for the circuit d
3. A INSTALLATION GUIDE SCXI 1313A Terminal Block This guide describes how to install and use the SCXI 1313A terminal block with an SCXJ 1125 module The SCXI 1313A terminal block is shielded and has screw terminals that provide input connections for the SCXI 1125 Each SCXI 1313A channel has a precision 100 1 resistive voltage divider that you can use to measure voltages of up to 150 Vms or 150 VDC You can individually bypass these voltage dividers for low voltage measurement applications The terminal block has 18 screw terminals for easy signal connection One pair of screw terminals connects to the SCXI 1125 chassis ground The remaining eight pairs of screw terminals connect signals to the eight analog inputs Conventions The following conventions are used in this guide The symbol leads you through nested menu items and dialog box options to a final action The sequence File Page Setup Options 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 a product refer to the Read Me First Safety and Radio Frequency Interference for information about precautions to take gt g When symbol is marked on a product it denotes a warning advising you t
4. Environment Operating temperature 00 ee 0 to 50 C Storage temperature ee eee 20 to 70 C Humidity sssrin aeiee 10 to 90 RH noncondensing Maximum altitude 2 000 meters Pollution Degree indoor use only 2 SCXI 1313A Terminal Block Installation Guide 10 ni com Safety This product is designed to meet the requirements of the following standards of safety for electrical equipment for measurement control and laboratory use e TEC 61010 1 EN 61010 1 e UL61010 1 CSA 61010 1 3 Note For UL and other safety certifications refer to the product label or visit ni com certification search by model number or product line and click the appropriate link in the Certification column Electromagnetic Compatibility This product is designed to meet the requirements of the following standards of EMC for electrical equipment for measurement control and laboratory use e EN 61326 EMC requirements Minimum Immunity e EN 55011 Emissions Group 1 Class A e CE C Tick ICES and FCC Part 15 Emissions Class A 3 Note For EMC compliance operate this device according to product documentation CE Compliance This product meets the essential requirements of applicable European Directives as amended for CE marking as follows e 2006 95 EC Low Voltage Directive safety e 2004 108 EC Electromagnetic Compatibility Directive EMC 3 Note Refer to the Declaration of Conformity DoC for this product for any additio
5. I 1313A to the SCXI 1125 using the thumbscrews 10 Refer to the SCXI Quick Start Guide to power on the SCXI chassis and configure the system in software ik Note For accurate cold junction compensation place the chassis away from an extreme temperature differential SCXI 1313A Terminal Block Installation Guide 4 ni com Configuring the High Voltage Attenuator Each channel has a 100 1 high voltage attenuator To enable or disable the attenuator either change the default configuration settings for the SCXI 1313A in Measurement amp Automation Explorer MAX or adjust the input limit ranges in your application When using virtual channels the input limits configured in the virtual channel configurator are used to set the attenuation circuitry appropriately 3 Note SCXI 1313 is the designator for both the SCXI 1313 and SCXI 1313A in MAX and NI DAQ The calibration EEPROM on the SCXI 1313A stores calibration constants that provide software correction values These values are used by the application development software to correct the measurements for gain errors in the attenuation circuitry Table 1 Input Signal Range Versus Gain Overall Module Terminal Gain Overall Voltage Range Gain Block Gain 0 02 150 Vin or 150 VDC 2 0 01 0 05 100 Vpeak or 100 VDC 5 0 01 0 1 50 Vpeak or 50 VDC 10 0 01 0 2 25 V peak OF 25 VDC 20 0 01 0 5 10 Vpeak or 10 VDC 50 0 01 1 5 Vpeak
6. al Block Installation Guide 8 ni com OUtpULS annia a a tea8 1 91 to 0 65 V from 0 to 50 C Maximum temperature gradient between sensor and any terminal 0 4 C non isothermal High voltage divider ACCULACY Annon ean n eaa 0 06 for 100 1 setting Difiza eran n s AAEE 15 ppm C RESIStANCE 0 eee ececeeesceesseeseeeseeeenees 1MQ Attenuation ratio cceceeeseeenees 100 1 or 1 1 on programmatic basis Common mode isolation Channel to channel eee 150 Vms or 150 VDC Channel to ground eee 150 Vins or 150 VDC Coupling nesne DC only Field wiring connectors Screw terminals Signal terminals 0 0 0 16 8 pairs Functional ground terminals 2 Maximum wire gauge 16 AWG Terminal spacing 0 0 0 5 cm 0 2 in center to center Dimensions of front entrance 1 2 x 7 3 cm 0 47 x 2 87 in Solder pads for additional components None Safety earth ground lugs 1 Strain relief cc ccssctckee ei enssuadiees Strain relief bar at terminal block entrance Maximum working voltage 150 V National Instruments Corporation 9 SCXI 1313A Terminal Block Installation Guide Physical 30 3 mm i 82 5 mm 049i 3 95 in lt _ gt POTN rs an e 173 5 mm 6 83 in _ _ gt ewe Y Figure 4 SCXI 1313A Dimensions Weight cnianesneinesnenssinae 408 g 14 4 oz
7. iagram shown in Figure 3 In LabVIEW you can use the Convert Thermistor Reading VI found in the Data Acquisition Signal Conditioning palette If you are using CVI or NI DAQm x use the Thermistor_Convert function The VI takes the output voltage of the temperature sensor the reference voltage and the precision resistance and returns the thermistor temperature Alternatively you can use the following formulas T C Tg 273 15 SCXI 1313A Terminal Block Installation Guide 6 ni com where Tx is the temperature in Kelvin 1 Tk z Gee a a are OS a b InR c InR J a 1 295361 x 10 3 b 2 343159 x 10 4 c 1 018703 x 10 7 Rr resistance of the thermistor in ohms V Ry 5 000 Cray ae a 2 5 pad Vrempou Vrempour Output voltage of the temperature sensor PCR ACO 3 39 5 where 7 F and T C are the temperature readings in degrees Fahrenheit and degrees Celsius respectively 3 Note Use an average of a large number of samples to obtain the most accurate reading Noisy environments require more samples for greater accuracy Reading the Temperature Sensor in LabVIEW In LabVIEW to read Vrgypoyr use NI DAQmx with the following string SC x Mod y _cj Temp To read Vreypour With Traditional NI DAQ Legacy use the address string obx scy mdz cjtemp You can have this channel address string in the same channel string array as other channels on the same SCXI 1125 module and call it multiple times withi
8. n the same channel string array For more information about channel string arrays and the SCXI channel addressing syntax see the LabVIEW Measurements Manual National Instruments Corporation 7 SCXI 1313A Terminal Block Installation Guide Temperature Sensor Circuit Diagram You do not need to read this section to operate the SCXI 1313A The circuit diagram in Figure 3 is optional information that you can use if you want more details about the SCXI 1313A temperature sensor 5V A 47kQ 3 1 25v 2 5kQ LM 4040 0 1 25V 01uF e e oMTENP 0 1 i a kn tour 04 yF at25 C T516V P o Figure 3 Temperature Sensor Circuit Diagram Specifications All specifications are typical at 25 C unless otherwise specified Input range ceeeceeceeseeeeeeeeeeeseeeeeeees 150 Vms or VDC Measurement Category eee CAT II Input channels eee eseereereeee 8 Cold junction sensor Sensor type oo eee eee eeeeeeeeeeeeees Thermistor ACCUracy oo ceeceeceeeseseeteeeeeeseseeeeees 0 5 C from 15 to 35 C 0 9 C from 0 to 15 C and 35 to 55 C Repeatability ee eeeeeeeeeseeeeeeeees 0 2 C from 15 to 35 C The temperature sensor accuracy includes tolerances in all component values effects caused by temperature and loading and self heating Errors caused by temperature gradients between terminals and the sensor are not included in this specification SCXI 1313A Termin
9. nal regulatory compliance information To obtain the DoC for this product visit ni com certification search by model number or product line and click the appropriate link in the Certification column National Instruments Corporation 11 SCXI 1313A Terminal Block Installation Guide Environmental Management National Instruments is committed to designing and manufacturing products in an environmentally responsible manner NI recognizes that eliminating certain hazardous substances from our products is beneficial not only to the environment but also to NI customers For additional environmental information refer to the MI and the Environment Web page at ni com environment This page contains the environmental regulations and directives with which NI complies as well as any other environmental information not included in this document Waste Electrical and Electronic Equipment WEEE EU Customers At the end of their 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 htm Dx EFRA mR A CHE RoHS OQO PARA National instruments 4 EE TAA EP ih H EEEE A eS gt ROHS XF National Instruments F E ROHS AAR XK ni com environment rohs_china For information about China ROHS compliance go to ni com environment rohs_china National Instruments NI ni com
10. o 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 gt gt 7 NATIONAL p INSTRUMENTS bold italic monospace monospace italic 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 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 Italic text in this font denotes text that is a placeholder for a word or value that you must supply What You Need to Get Started To set up and use the SCXI 1313A terminal block you need the following items Q Hardware SCXI 1313A terminal block SCXI 1125 module SCXI or PXI SCXI combination chassis Cabling and sensors as required for your application Q Tools Number 1 and 2 Phillips head screwdrivers 1 8 in flathead screwdriver Long nose pliers Wire cutte
11. r Wire insulation stripper Q Documentation SCXI 1313A Terminal Block Installation Guide Read Me First Safety and Radio Frequency Interference DAQ Getting Started Guide SCXI Quick Start Guide SCXI 1125 User Manual SCXI chassis or PXI SCXI combination chassis user manual You can download needed documents from ni com manuals SCXI 1313A Terminal Block Installation Guide 2 ni com Connecting Signals 3 Note Refer to the Read Me First Safety and Radio Frequency Interference document before removing equipment covers or connecting or disconnecting any signal wires To connect the signal to the terminal block refer to Figures 1 and 2 while completing the following steps Back View Front View 1 Top Cover Screws 5 Rear Connector 8 Circuit Board Attachment Screws 2 Top Cover 6 Circuit Board 9 Strain Relief Bar 3 Terminal Block Enclosure 7 Safety Ground Lug 10 Strain Relief Screws 4 Thumbscrew 2 Figure 1 SCXI 1313A Parts Locator Diagram 1 Unscrew the top cover screws and remove the top cover 2 Loosen the strain relief screws and remove the strain relief bar 3 Prepare the signal wire by stripping the insulation no more than 7 mm 0 28 in National Instruments Corporation 3 SCXI 1313A Terminal Block Installation Guide 4 Run the signal wires through the strain relief opening If necessary add insulation or padding 5 Insert the stripped end of the signal wires f
12. ully into the terminal Make sure no exposed wire extends past the screw terminal Exposed wire increases the risk of a short circuit that can cause circuit failure 0000000 000 0g One E i 000000000000 U5 U6 oLan NATIONAL 0 000 0 000 D 000 0 ENsTruments ka o 000 o ooo H COPYRIGHT 2007 U3 U7 u8 000o 0 SCXI 1313A C AN 0 000 0 000 ooo o FOR PATENTS NI COI PATENTS o ooo g coo RP1 RP RP7 RP8 ala eg aps 2 0 00 0 Oy wt Rei Re O 0 00 0 J2 J3 J4 gt co O O00000 a OO0O00000 O FRONT FRONT 2 8 A H CHASSIS ojo olo cHo cH1 CH2 CH3 cha chs cHe cH7 LSROUND olo o o D ojo o o ojo 0 Serial Number Assembly Number and Revision Letter Relays to Enable or Bypass the Attenuator 8 places Chassis Ground Terminal 2 places Product Name Thermistor Screw Terminal 16 places Channel Labeling 8 places Voltage Divider 8 places OOND ARAOUN Figure 2 SCXI 1313A Circuit Board Parts Locator Diagram 6 Tighten the terminal screws to a torque of 0 57 to 0 79 N m 5 to 7 Ib in 7 Reinstall the strain relief bar and tighten the strain relief screws Reinstall the top cover and tighten the top cover screws 9 Attach the SCX
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