Instruction/ maintenance manual of the product SCC-AI07 National Instruments
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USER GUIDE SCC-AI Series Isolated Analog Input Modules The SCC-AI Series isolated analog input modules (SCC-AI XX ) can extract a relativ ely low-amplitude input signal from a high-commo n-mode voltage so the E Series D A Q de vice can measure the input sig nal.
SCC-AI Series Isolated Analog Input Modules 2 ni.com Conventions The follo wing con ventions are used in this guide: < > Angle brackets that contain numbers separated by an ellipsis represent a range of v alues associated with a bit or signal name—for e xample, ai<0.
© National Instruments Corporation 3 SCC-AI Series Isolated Analog Input Modules ❑ One or more SCC-SG XX ❑ SCC-SG Series Strai n-Gauge Modules User Guide ❑ SC-2345 User Manual ❑ Read Me Fir s.
SCC-AI Series Isolated Analog Input Modules 4 ni.com Installing the Module Caution R efer to the Read Me First: Sa fety and Radio-F requency Interf erence document before remo ving equipment co vers or connectin g/disconnect ing any si gnal wires A blue label stripe identifies the SCC- AI XX as an an alog input m odule.
© National Instruments Corporation 5 SCC-AI Series Isolated Analog Input Modules Connecting the Input Signals The SCC- AI XX has a f ixed scre w-terminal receptacle and a remo vabl e scre w-terminal block, as sho wn in F igure 1-2.
SCC-AI Series Isolated Analog Input Modules 6 ni.com Figu re 1-3. SCC-AI XX Signal Co nnecti ons The input s are designed in a floating (no nreferenced) singl e-ended conf iguration. If the measured signals are floating, con nect the negati ve input pin s, 1 and 3, to AISENSE on the SC-2345 te rminal block through a1 0k Ω to 100 k Ω resistor.
© National Instruments Corporation 7 SCC-AI Series Isolated Analog Input Modules If a high commo n-mode v oltage is present, conn ect the negati ve input pins, 1 and 3, t o the signal r eference. Figure 1-5 sh ows a ground-r eferenced signal co nnection on on e channel of t he SCC-AI XX .
SCC-AI Series Isolated Analog Input Modules 8 ni.com 4. In th e SCC Connecto r Block Configuration window , configure the SCC syst em as follows: a. Specify the SCC Carrier T ype . The location of the SCC sockets change depen ding on the S CC carrier type.
© National Instruments Corporation 9 SCC-AI Series Isolated Analog Input Modules 10. If you mak e a selection mistak e, select the socket and click Remove . 11. Repeat steps 8 an d 9 for each ne wly installed SCC. 12. Clic k OK after completing all SCC entries.
SCC-AI Series Isolated Analog Input Modules 10 ni.com T ab le 1-2 shows su ggested values for some o f the par ameters. Use d efault v alues for parameters not s hown. 9. Clic k Te s t to test the channel. Y ou should be ab le to vie w your measurement in the window that ap pears.
© National Instruments Corporation 11 SCC-AI Series Isolated Analog Input Modules Scal ing V oltage Me asur ement s If you c onf igured the S CC-AI XX using MAX and you are using NI-D A Q, the vo ltage reading you get from the E Series D A Q de vice accounts for the vo ltage scaling effect of the SCC-AI XX .
SCC-AI Series Isolated Analog Input Modules 12 ni.com Filter Characte ristics Number of poles ......... ...................... ......3 Rolloff ................... ................. .................60 dB/decade Cutoff freq uency (–3 dB) AI0 X ......
© National Instruments Corporation 13 SCC-AI Series Isolated Analog Input Modules Environment al Operating temperature........ ................. ... 0 to 50 ° C Storage temperature ............................ ... –20 to 70 ° C Humidity .........
SCC-AI Series Isolated Analog Input Modules 14 ni.com Calibrating Gain and Offset Errors The SCC-AI XX is cal ibrated at the factory b efore shipmen t.
© National Instruments Corporation 15 SCC-AI Series Isolated Analog Input Modules 9. Adjust the trimp ot labeled Gain located on the top of the SCC-AI XX . If the v alue you obtained in step 8 is less than the input voltage, turn the trimpot clockwise to increase the g a in.
SCC-AI Series Isolated Analog Input Modules 16 ni.com SCC-AI XX Module Pin Assignments Figure 1-6 shows the I/O connect or pins on the bottom of t he module. Figur e 1-6. SCC Module Bottom View T able 1-4 lists the sig nal correspondi ng to each I/O connector pin o n the bottom of the SCC-AI XX .
© National Instruments Corporation 17 SCC-AI Series Isolated Analog Input Modules 9 + 6 V 10 GND 11 AG N D 12 REF5V 13 + 15 V 14 –15 V 15 — 16 — 17 — 18 — 19 — 20 — Tabl e 1-4.
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