SCXI-1314T TEDS Bridge Sensor Terminal Block Installation Guide
Contents
1. 1 Shunt Resistor Sockets Figure 2 SCXI 1314T Shunt Resistor Sockets Reinstall the top cover and tighten the top cover screws 6 Referto the SCXI Quick Start Guide to finish installing the SCXI 1314T and configure it in Measurement amp Automation Explorer MAX and to find instructions for taking measurements National Instruments Corporation 5 SCXI 1314T TEDS Bridge Sensor Terminal Block Channel Signals Table 1 lists the signal names of the terminals for each channel and lists the correlation between the pin numbers of the RJ 50 10p10c modular plug and the SCXI 1314T receptacle Table 1 Channel Signal Names RJ 50 10p10c Modular Plug and SCXI 1314T Receptacle Pin Numbers Pin Signal Name Signal Description 1 SCA Shunt calibration Pin 1 2 Al Positive input signal 3 AI Negative input signal Pin 10 4 RS Positive remote sense signal 5 RS Negative remote sense signal 6 EX Positive excitation signal Pin 1 7 EX Negative excitation signal Pin 10 8 T TEDS data 9 T TEDS ground 10 SCA Shunt calibration TEDS Sensor Bridge Configurations This section describes the quarter half and full bridge TEDS sensor bridge configurations available for use with the SCXI 1314T SCXI 1314T TEDS Bridge Sensor Terminal Block 6 ni com Quarter Bridge This section shows the quarter bridge signal connections Figure 3 shows the quarter bridge c2. 1 Unscrew the top cover screws and remove the top cover Q o 1 Top Cover Screws 3 RJ 50 Connector 2 Top Cover 4 Thumbscrew Figure 1 SCXI 1314T Parts Locator Diagram 2 Use long nose pliers to carefully remove the socketed 100 KQ precision resistors Sy Note To avoid damaging the precision resistors pull the leads directly alternating the force back and forth rather than pulling the resistor itself 3 Use wire cutters to shorten the new resistor leads to 6 4 mm 0 25 in SCXI 1314T TEDS Bridge Sensor Terminal Block 4 ni com 4 Use long nose pliers to insert the new resistors into the sockets indicated in Figure 2 Ss OOOOOOOOOOOOOOOO0O0O000 QoS Sb ho 000000000000000000000000 o O S sS Ponte 2 2 99 0 9000009 090 000000090 CZDIDeXDOD 0 oor oo NATIONAL c D110 L I R4 PEinsteoments N114 00000000000 us DIcice 2 o 2 o S S O OO 30 x e E S Si S s S z z z z NE E E 2 2 2 e 2 BIE v v og 00000000000 O O TO a RIS Fi RIS RIG R mE OOSGOsozo0 Bd p ow eund goo goo OILS amp RIB ODE Spp Poo OID R22 Kx Ne a PEERI E op cs o a E rsp000 00 DID R2 o S OF Bh sco 56 26 26 E H 00000 00000 00000 00000 E O0000 O0000 OOOOO OOOOO OOOOO O0000 O0000 00000 Bi o OO OO QOO OO OO QOO AO Q O ep O
3. 73 23 EEC Electromagnetic Compatibility Directive EMC sees 89 336 EEC nye 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 certification search by model number or product line and click the appropriate link in the Certification column SCXI 1314T TEDS Bridge Sensor Terminal Block 18 ni com National Instruments NI ni com NI DAQ and SCXI are trademarks of National Instruments Corporation 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 p your software the patents tat file on your CD orni com patents 373746C 01 Aug04 2004 National Instruments Corp All rights reserved
4. A INSTALLATION GUIDE SCXI 1314T TEDS Bridge Sensor Terminal Block This guide describes how to install and use the SCXI 1314T terminal block with the SCXI 1520 module and hardware Transducer Electronic Data Sheet TEDS enabled bridge sensors IEEE P 1451 4 Class 2 The SCXI 1314T terminal block works with the SCXI 1520 universal strain bridge sensor module to conveniently connect hardware TEDS smart sensors using RJ 50 10 position 10 conductor 10p10c modular plugs There are 10 pins arranged in eight modular jacks Each jack corresponds to one of the eight channels available on the SCXI 1520 For a complete description of the use and operation of the SCXI 1520 module refer to the SCXI 1520 User Manual Conventions The following conventions are used in this manual 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 When this icon 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
5. SCXI 1520 Bridge Configuration TEDS Transducer SCXI 1314T Set to Full Bridge EX Shunt Cal A R TEDS EEPROM 86 TEDS Digital i F g q Comm Communication i ie Circuitry Circuitry Figure 5 Full Bridge Circuit Diagram The following symbols apply to the circuit diagram and equations R Ry R and Ry are active measuring elements e Vgyis the excitation voltage e Rjisthe lead resistance e Vjjis the measured voltage Vgsis the remote sense measured excitation voltage e T is the TEDS data transmission line e T isthe TEDS ground reference National Instruments Corporation 11 SCXI 1314T TEDS Bridge Sensor Terminal Block B Note For greatest calibration accuracy use separate wires between the bridge and the SCA terminals as shown in Figure 5 Connecting the Signals Complete the following steps to connect the signals wires to the RJ 50 10p10c modular plug 1 Determine the number of signals used in your application You can use a maximum of 10 signal wires per RJ 50 10p10c modular plug Choose the shielded twisted pair up to 5 pair 10 conductor cable for your application The recommended twisted pairs are as follows e AL AI e RS M RS e EX MEX s ID SCA SCA Expo
6. be hot Touching this component may result in bodily injury pP Be Qr NATIONAL p INSTRUMENTS bold italic monospace 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 This font 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 What You Need to Get Started To install and use the SCXI 1314T terminal block you need the following items C Hardware SCXI 1314T terminal block SCXI 1520 module SCXI or PXI SCXI combination chassis Cabling cable adapter and Wheatstone bridge sensors as required for your application Q Documentation A Read Me First Safety and Radio Frequency Interference SCXI Quick Start Guide SCXI 1314T TEDS Bridge Sensor Terminal Block Installation Guide SCXI 1520 User Manual SCXI or PXI SCXI combination chassis user manual SCXI 1314T TEDS Bridge Sensor Terminal Block 2 ni com L Tools Num
7. ber 2 Phillips screwdriver Long nose pliers Wire cutter RJ 50 terminal crimper C Cables and plugs Shielded twisted pair up to 5 pair 10 conductor cable Up to eight RJ 50 10p10c modular plugs iy Note If your application does not require shunt calibration you also can use RJ 45 10 position 8 conductor 10p8c modular plugs in which only pins 2 through 9 are populated However NI recommends using the RJ 50 10p10c for most applications Changing the Shunt Resistors R Note Refer to the Read Me First Safety and Radio Frequency Interference document before removing equipment covers or connecting or disconnecting any signal wires Each channel input contains pins that connect to the inputs and outputs of the SCXI 1520 and to a precision 100 k shunt calibration resistor The SCXI 1520 contains relays that switch the resistors in and out of the input circuit to provide shunt calibration These resistors are placed in sockets on the SCXI 1314T terminal block so you can easily replace them with resistors suitable to the specific Wheatstone bridge sensor in your application If your application requires different shunt resistor values exchange the resistors with the appropriate value 1 4 W resistors i Note Only the shunt resistors are socketed National Instruments Corporation 3 SCXI 1314T TEDS Bridge Sensor Terminal Block To change shunt resistors complete the following steps referring to Figures and 2 as necessary
8. connections Figure 4 shows the half bridge circuit wiring diagram iyi Note AI is left unwired Set the SCXI 1520 module to internal half bridge completion Refer to the SCXI 1520 User Manual for more information SCXI 1520 Bridge Configuration TEDS Transducer SCXI 1314T Set to Half Bridge R AM VB Ry gauge Digital q Comm ges Communication TEDS Digital Circuitry Circuitry Figure 4 Half Bridge Circuit Diagram The following symbols apply to the circuit diagram and equations e R and R are half bridge completion resistors e Rs andR are the active measuring elements e Vy is the excitation voltage National Instruments Corporation 9 SCXI 1314T TEDS Bridge Sensor Terminal Block eR is the lead resistance e V4 is the measured voltage Vgsis the remote sense measured excitation voltage e T is the TEDS data transmission line e T isthe TEDS ground reference hi Note For greatest calibration accuracy use separate wires between the bridge and the SCA terminals as shown in Figure 4 SCXI 1314T TEDS Bridge Sensor Terminal Block 10 ni com Full Bridge This section shows the full bridge signal connections Figure 5 shows the full bridge circuit wiring diagram
9. hods to ground the signals wires in your TEDS application e Attach the cable shielding to the TEDS sensor as shown in Figure 9 1 Cable Shielding 2 Cable Insulation 3 TEDS Sensor Figure 9 Attach the Shielding to the TEDS Sensor e Connect the cable shielding to the metal grounding portion of the RJ 50 10p10c modular plug with a grounding wire as shown in Figure 10 1 Ground Shield 3 Cable Insulation 2 Grounding Wire 4 Cable Shielding Figure 10 Connect the Shielding to the RJ 50 10p10c Modular Plug SCXI 1314T TEDS Bridge Sensor Terminal Block 14 ni com e Connect the conduit cable shielding to the metal thumbscrew of the SCXI module with a grounding wire as shown in Figure 11 1 Conduit Cable Insulation 5 SCXI 1314T 2 Grounding Strap Wire 6 RJ 50 10p10c Modular Plug 3 SCXI Module 7 Twisted Pair Cable 4 Thumbscrew 8 Cable Shielding Figure 11 Connect the Shielding to the SCXI Module Using the Thumbscrew 9 After you have grounded your application insert the RJ 50 10p10c modular plugs into the SCXI 1314T iyi Note Improperly grounding the shielding causes signal noise 10 Refer to the SCXI Quick Start Guide to power on the SCXI chassis and configure the system in software National Instruments Corporation 15 SCXI 1314T TEDS Bridge Sensor Terminal Block TEDS Re
10. ircuit wiring diagram iyi Note AI is left unwired Set the SCXI 1520 module to internal half bridge completion Refer to the SCXI 1520 User Manual for more information SCXI 1520 Bridge Configuration TEDS Transducer SCXI 1314T Set to Half Bridge R AM VS Ry gauge Digital Tc TEDS Bus Digital i 1 Comm He Communication E i i Circuitry Circuitry Figure 3 Quarter Bridge Circuit Diagram The following symbols apply to the circuit diagram and equations e R and R are half bridge completion resistors e R is the quarter bridge completion resistor dummy resistor you provide externally to the SCXI 1314T e Rj4isthe active measuring element National Instruments Corporation ie SCXI 1314T TEDS Bridge Sensor Terminal Block e Vey is the excitation voltage e R is the lead resistance e Vajis the measured voltage e Vrs is the remote sense measured excitation voltage e T is the TEDS data transmission line e T isthe TEDS ground reference 3 Note For greatest calibration accuracy use separate wires between the bridge and the SCA terminals as shown in Figure 3 SCXI 1314T TEDS Bridge Sensor Terminal Block 8 ni com Half Bridge This section shows the half bridge signal
11. lated Information You can find more TEDS related information in the following locations e Measurement amp Automation Explorer Help for NI DAQmx and the NI DAQmx Help e ni com info entering any of the following info codes rdsenr rdpnpy rdpnsn rdted6 rdrscl Specifications All specifications are typical at 25 C unless otherwise specified Electrical Shunt calibration resistors RN 55 style 1 4 W Accuracy of resistors 100 KQ shunt calibration resistor 0 1 Temperature coefficient of resistors 100 KQ shunt calibration resistor 410 ppm C Mechanical Resistor sockets Lead S126 mtt 0 6 to 0 7 mm 0 023 to 0 026 in Lead length enne 2 8 to 4 4 mm 0 110 to 0 175 in L ead spacitig eee t n 12 7 mm 0 500 in RJ 50 receptacle mean number of insertions before failure eee 500 SCXI 1314T TEDS Bridge Sensor Terminal Block 16 ni com Maximum Working Voltage Maximum working voltage refers to the signal voltage plus the common mode voltage Analog signals Channel to earth Either the AI X or AI X input should remain within 10 V of ground Both inputs should be within 10 V of one another Installation Category I Channel to channel Either the AI X or AI X input should remain within 10 V of ground Both inputs should be within 10 V of one another Installa
12. se 12 7 to 15 9 mm 0 500 to 0 625 in of signal wires without stripping the insulation as shown in Figure 6 Do not strip the insulation from the exposed signal wires 1 Insulation 2 Shielding 3 Unstripped Signal Wires Figure 6 Unstripped Exposed Wire for RJ 50 10p10c Modular Plug Connection 4 2s Determine the color coding of the signal wires for your application Untwist and flatten the wires into the correct color order for your application Maintain the twist in the wire as close as possible to the RJ 50 modular plug while allowing enough room to insert the wires into the plug SCXI 1314T TEDS Bridge Sensor Terminal Block 12 ni com 6 Insert the wires into the RJ 50 10p10c modular plug as shown in Figure 7 1 Insulation 3 Unstripped Signal Wires 2 Shielding 4 RJ 50 10p10c Modular Plug Figure 7 Inserting Signal Wires into RJ 50 10p10c Modular Plug 7 Crimp the terminal using an RJ 50 terminal crimper as shown in Figure 8 LUN 1 Shielded Twisted Wire Cable 3 RJ 50 Terminal Crimper 2 RJ 50 10p10c Modular Plug Figure 8 Crimping the RJ 50 10p10c Modular Plug National Instruments Corporation 13 SCXI 1314T TEDS Bridge Sensor Terminal Block Note Refer to ni com info and enter info code rdrj50 for more information on RJ 50 modular plug crimpers modular plugs and cables 8 Useonly one of the following met
13. tion Category I Digital signals Channel to earth 0 to 5 V of one another Environmental Operating temperature 0 to 50 C Storage temperature esses 20 to 70 C Hu nudity m RII ner eye 10 to 90 RH noncondensing Maximum altitude ss 2 000 m Pollution Degree indoor use only 2 Safety The SCXI 1314T terminal block meets the requirements of the following standards for safety and electrical equipment for measurement control and laboratory use e TEC 61010 1 EN 61010 1 e UL 61010 1 e CAN CSA C22 No 61010 1 ays 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 National Instruments Corporation 17 SCXI 1314T TEDS Bridge Sensor Terminal Block Electromagnetic Compatibility ESSO S uae eee edd EN 55011 Class A at 10 m FCC Part 15A above 1 GHz Immunity 5 ette teretes ttes EN 61326 1997 A2 2001 Table 1 EMC BMI 5 5 erri en tiit CE C Tick and FCC Part 15 Class A Compliant B Note For EMC compliance operate this device with shielded cabling CE Compliance The SCXI 1317 terminal block meets the essential requirements of applicable European Directives as amended for CE marking as follows Low Voltage Directive safety
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