- DL manuals
- National Instruments
- Switch
- 1128
- User Manual
National Instruments 1128 User Manual
Summary of 1128
Page 1
Scxi ™ scxi-1127/1128 user manual scxi-1127/1128 user manual december 2000 edition part number 322149b-01.
Page 2
Worldwide technical support and product information ni.Com national instruments corporate headquarters 11500 north mopac expressway austin, texas 78759-3504 usa tel: 512 794 0100 worldwide offices australia 03 9879 5166, austria 0662 45 79 90 0, belgium 02 757 00 20, brazil 011 284 5011, canada (cal...
Page 3: Important Information
Important information warranty the scxi-1127 and scxi-1128 are warranted against defects in materials and workmanship for a period of one year from the date of shipment, as evidenced by receipts or other documentation. National instruments will, at its option, repair or replace equipment that proves...
Page 4: Compliance
Compliance fcc/canada radio frequency interference compliance* determining fcc class the federal communications commission (fcc) has rules to protect wireless communications from interference. The fcc places digital electronics into two classes. These classes are known as class a (for use in industr...
Page 5
• connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • consult the dealer or an experienced radio/tv technician for help. Canadian department of communications this class b digital apparatus meets all requirements of the canadian interference-ca...
Page 6: Conventions
Conventions the following conventions are used in this manual: angle brackets that contain numbers separated by an ellipsis represent a range of values associated with a bit or signal name—for example, dbio. » the » symbol leads you through nested menu items and dialog box options to a final action....
Page 7: Contents
© national instruments corporation vii scxi-1127/1128 user manual contents chapter 1 installing and configuring the scxi-1127/1128 installing the software ...................................................................................................1-2 installing the hardware......................
Page 8
Contents scxi-1127/1128 user manual viii ni.Com hardware-timed scanning using a dmm ........................ 2-14 hardware-timed scanning using external instruments ... 2-14 synchronous scanning ....................................................... 2-14 handshaking scanning ..........................
Page 9
Contents © national instruments corporation ix scxi-1127/1128 user manual glossary index figures figure 1-1. Installing the scxi-1127/1128 into an scxi chassis ..........................1-4 figure 1-2. 4-slot single-chassis installation .........................................................1-6 fi...
Page 10
Contents scxi-1127/1128 user manual x ni.Com figure 2-24. 8 × 16 matrix parts locator diagram ................................................... 2-27 figure 2-25. 8 × 16 matrix schematic....................................................................... 2-28 figure 2-26. Scxi-1127/1128 relay co...
Page 11: Scxi-1127/1128
© national instruments corporation 1-1 scxi-1127/1128 user manual 1 installing and configuring the scxi-1127/1128 the scxi-1127 and scxi-1228 modules are high-voltage multiplexer/matrix modules. The scxi-1127 is a high-density armature relay module. The scxi-1128 is a high-density solid-state relay ...
Page 12: Installing The Software
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-2 ni.Com in a matrix configuration, you can expand the columns of the matrix using the hvab-backplane adapter. For example, you can connect two scxi-1127/1128 modules via the hvab-backplane adapter to create a 4 × 1...
Page 13: Installing The Hardware
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-3 scxi-1127/1128 user manual the ni-switch and ni-dmm version 1.5 installation window offers three choices: • install ni-dmm —choose this selection if you want to install only the software for the dmm. • ins...
Page 14
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-4 ni.Com installing the scxi-1127/1128 module into the scxi chassis you need the following items to complete the installation: • scxi-1127/1128 • scxi chassis • 1/8 in. Flathead screwdriver figure 1-1. Installing th...
Page 15
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-5 scxi-1127/1128 user manual note when installing the scxi-1127/1128 module in an scxi chassis, the rightmost slot (when the chassis is viewed from the front) must be filled first, then fill the slot to the ...
Page 16
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-6 ni.Com single 4-slot chassis configuration refer to figures 1-2 and 1-3 to make connections in the single 4-slot chassis configuration. Figure 1-2. 4-slot single-chassis installation 1 scxi-1127/1128 module 2 4-sl...
Page 17
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-7 scxi-1127/1128 user manual figure 1-3. 4-slot configuration parts locator diagram 1. Install the 2-slot hvab-backplane adapter behind slots 3 and 4. 2. Install additional 1-slot hvab-backplane adapters beh...
Page 18
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-8 ni.Com single 12-slot chassis configuration refer to figures 1-4 and 1-5 to make connections in the single 12-slot chassis configuration. Figure 1-4. 12-slot single-chassis installation 1 scxi-1127/1128 module 2 1...
Page 19
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-9 scxi-1127/1128 user manual figure 1-5. 12-slot configuration parts locator diagram 1. Install the 8-slot hvab-backplane adapter behind slots 5 through 12. 2. Install additional 2-slot and 1-slot hvab-backp...
Page 20
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-10 ni.Com connecting the scxi-1127/1128 to the dmm in a multichassis system the following sections describe how to configure the following multichassis configurations: • 4-slot and 4-slot multichassis configuration ...
Page 21
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-11 scxi-1127/1128 user manual refer to figure 1-6 to set up this multichassis configuration. Figure 1-6. 4-slot to 4-slot multichassis configuration parts locator diagram 1. Install the hvab-backplane adapte...
Page 22
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-12 ni.Com 2. Connect the hv8-hv8 cable from the first chassis, normally the connector behind slot 1, to the hvab connector (behind slot 4) of the next chassis. 3. Connect the sh9md-9md cable from the aux out connect...
Page 23
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-13 scxi-1127/1128 user manual refer to figure 1-7 to set up this multichassis configuration. Figure 1-7. 4-slot to 12-slot multichassis configuration parts locator diagram 1 2-slot hvab-backplane adapter 2 1...
Page 24
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-14 ni.Com 1. Install the hvab-backplane adapters and jumper blocks in the 12-slot chassis as described in steps 1 through 3 in single 12-slot chassis configuration . 2. Connect the hv8-hv8 cable from the first chass...
Page 25
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-15 scxi-1127/1128 user manual refer to figure 1-8 to set up this multichassis configuration. Figure 1-8. 12-slot to 12-slot multichassis configuration parts locator diagram 1. Install the hvab-backplane adap...
Page 26
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-16 ni.Com notes do not connect the sh9md-9md cable to the 2-slot hvab-backplane adapter. An scxi-1127/1128 is required in slot 12 of each 12-slot chassis to establish communications with all the chassis in the syste...
Page 27
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-17 scxi-1127/1128 user manual 5. Connect the hv8-ban4 cable from the dmm to the hvab connector behind scxi slot 4. 6. Connect the sh9md-9md cable from the dmm to the aux in connector. 7. You can install any ...
Page 28
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-18 ni.Com dmm in pxi slots 1 through 3 configuration to install your dmm in pxi slots 1 through 3, follow these steps: 1. Install your dmm in any one of the pxi slots 1 through 3. 2. In the scxi subsystem, install t...
Page 29
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-19 scxi-1127/1128 user manual • at least one other scxi module other than the scxi-1127/1128, installed in the chassis consult the documentation for your scxi chassis and other scxi modules for additional in...
Page 30
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-20 ni.Com 3. Attach the other end of the daq cable to the national instruments daq device. 4. Check the installation. 5. Turn on the scxi chassis. 6. Turn on the computer or reconnect it to your chassis. If you alre...
Page 31
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-21 scxi-1127/1128 user manual – sh9md-9md cable – 8-position hvab plug – hv8-ban4 cable • external dmm (if needed) • ban2-wire kit (two kits needed for 4-wire), if not using the hv8-ban4 cable • cable or wir...
Page 32: Configuring and Self-Test
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-22 ni.Com note for the system to function properly, it must be controlled by a daq device or ni 4021 switch controller, or be a 2000 series scxi chassis. Configuring and self-test run measurement & automation explor...
Page 33
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-23 scxi-1127/1128 user manual 2. You will see the chassis selected in the list. Display the list of modules in the chassis by clicking the + next to the chassis icon. 3. Right-click the module you want to co...
Page 34: Safety Information
Chapter 1 installing and configuring the scxi-1127/1128 scxi-1127/1128 user manual 1-24 ni.Com to remove a module or chassis, right-click the chassis or module you want to remove and select delete . To test the chassis configuration, right-click the chassis and select test . Safety information the f...
Page 35
Chapter 1 installing and configuring the scxi-1127/1128 © national instruments corporation 1-25 scxi-1127/1128 user manual national instruments for service and repair to ensure that its safety features are not compromised. When using the terminal block with high common-mode voltages, you must insula...
Page 36: Using The Scxi-1127/1128
© national instruments corporation 2-1 scxi-1127/1128 user manual 2 using the scxi-1127/1128 this chapter discusses in detail the operation of the scxi-1127/1128. There are two major modes of operation: multiplexer and matrix. A third mode of operation, independent mode, allows you to access advance...
Page 37
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-2 ni.Com the scxi-1331 terminal block consists of a shielded board with 84 screw terminals for easy connection to the scxi-1127/1128 input connector. The scxi-1331 is shown in figure 2-1. Figure 2-1. Scxi-1331 signal connections dependi...
Page 38
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-3 scxi-1127/1128 user manual the scxi-1127/1128 contains a safety interlocking mechanism that prevents high voltages from appearing on the input connector when a terminal block is not present. However, when a scxi-1331 or scxi-1...
Page 39
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-4 ni.Com figure 2-3 shows an example of a 2-wire configuration using the scxi-1331 terminal block. The diagram shows the 2-wire terminal block connections for channels 2, 5, 24, and 27. Channel 2 measures a voltage source (v 1 ). The po...
Page 40
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-5 scxi-1127/1128 user manual 1-wire channel scanning configuration the scxi-1127/1128 has 64, 1-wire channels in the multiplexer mode that are available through the scxi-1331 terminal block. Figure 2-4 shows the scxi-1127/1128 c...
Page 41
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-6 ni.Com figure 2-5. 1-wire wiring diagram both channel 24 (v 1 ) and 59 (v 2 ) are measuring voltage sources. The positive terminal of these sources go to screw terminals labeled 24 and 59 respectively. The negative terminals or the co...
Page 42
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-7 scxi-1127/1128 user manual figure 2-6. 4-wire block diagram when used with a dmm for 4-wire ohms measurement, the upper differential multiplexer provides the excitation source for the 4-wire channel being scanned. The excitati...
Page 43
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-8 ni.Com figure 2-7. 4-wire wiring diagram on power up, the ab0 and ab2 switches are open, disconnecting the scxi-1127/1128 from the high-voltage bus. If you are using this module with a high-voltage backplane, you need to close the ab0...
Page 44
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-9 scxi-1127/1128 user manual negative screw terminals and sensed via 1b positive and negative screw terminals. Note out0± and out2± are also referred to as com0± in a 4-wire configuration. 4-wire versus 2-wire resistance measure...
Page 45
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-10 ni.Com current and the other for sensing the voltage developed across the resistor, as shown in figure 2-9. Figure 2-9. Signal connections for a 4-wire resistance measurement since ideally the impedance of the voltmeter is infinite, ...
Page 46
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-11 scxi-1127/1128 user manual figure 2-10. Mixed mode scanning with an scxi-1331 you can scan the channels in any sequence you want. You can connect more than one scxi-1127/1128 module together using the hvab-backplane adapter f...
Page 47
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-12 ni.Com scxi-1127/1128. In its simplest form, hardware-timed scanning uses one triggering signal to advance the multiplexer to the next channel in the scan. This is called synchronous scanning . Note when using a dmm with the scxi-112...
Page 48
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-13 scxi-1127/1128 user manual figure 2-11. Hardware scanning flowchart the channel scan list is downloaded to scxi-1127/1128. The first channel in the scan list is selected. Switch to the next channel in the scan list. Pulse sca...
Page 49
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-14 ni.Com hardware-timed scanning using a dmm when using a dmm with the scxi-1127/1128, synchronous mode is the only mode in which the dmm and the scxi-1127/1128 operate. The dmm issues a trigger to advance the multiplexer at regular in...
Page 50
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-15 scxi-1127/1128 user manual the module to which you connected your external dmm trigger signals is referred to as the cabled module. If you add additional scxi-1127/1128 modules to your system, it is not necessary to cable the...
Page 51
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-16 ni.Com module. You can bus the vmc onto the scxi backplane (trig 0), allowing other modules to be triggered as shown in figure 2-14. You must daisy-chain the scanadvd trigger from one module to another. Figure 2-14. Daisy-chained for...
Page 52
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-17 scxi-1127/1128 user manual software scanning unlike hardware scanning, software scanning does not use hardware-generated triggers. In software scanning, a list of channels kept by the software is scanned by selecting the desi...
Page 53
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-18 ni.Com figure 2-16. Temperature measurement wiring diagram the scxi-1331 contains a cold-junction temperature sensor (cjs). This sensor is a special channel on the scxi-1127/1128 dedicated to measuring the ambient temperature of the ...
Page 54
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-19 scxi-1127/1128 user manual ni-daq, 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. Al...
Page 55: Operating As A Matrix
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-20 ni.Com the best accuracy, while 1-wire provides the maximum channel count. Use the 4-wire configuration to eliminate the effects of lead resistance on the measurement. Since the lead resistance is typically small when compared with t...
Page 56
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-21 scxi-1127/1128 user manual figure 2-18 shows an example of the scxi-1331 and scxi-1127/1128 configured as a 1 × 32, 2-wire matrix. The diagram shows the 2-wire terminal block connections for channels 3, 15, 27 and out0. You c...
Page 57
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-22 ni.Com figure 2-19. Scxi-1332 terminal block the scxi-1127/1128 installed with the scxi-1332 provides you with an 4 × 8 matrix without any extra wiring except for hooking up your signals to the columns and rows of the matrix. Refer t...
Page 58
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-23 scxi-1127/1128 user manual supply output voltage and to measure the load resistors. A simple test can consist of first measuring the values of the resistances while they are not connected to the power supply, and then monitor...
Page 59
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-24 ni.Com figure 2-21. Scxi-1332 connected to an scxi-1127/1128 schematic matrix expansion you can build matrices larger than 4 × 8 by using multiple scxi-1127/1128 modules. You can build these larger matrices using row and column expan...
Page 60
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-25 scxi-1127/1128 user manual figure 2-22. 8 × 8 matrix parts locator diagram 1 scxi-1127/1332 #1 2 matrix expansion cables 3 scxi-1127/1332 #2 1 3 2 2.
Page 61
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-26 ni.Com figure 2-23. 8 × 8 matrix schematic to make a larger matrix, such as a 8 × 16 matrix, you must make both column and row expansions. Follow these instructions to build a larger matrix: 1. Expand the columns to the target number...
Page 62
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-27 scxi-1127/1128 user manual 2. Expand the rows to the target number, 8 in this case, by connecting the columns of the appropriate number of 4 × 16 matrix blocks, two in this case, using matrix expansion cables. Figure 2-24 sho...
Page 63
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-28 ni.Com figure 2-25 shows the schematic of the 8 × 16 matrix shown in figure 2-24. Figure 2-25. 8 × 16 matrix schematic cable #6 cable #1 cab le #5 cab le #3 cab le #2 cab le #4 terminal block boundary scxi-1127/scxi-1332 #1 r0 r1 r2 ...
Page 64: Independent Mode
Chapter 2 using the scxi-1127/1128 © national instruments corporation 2-29 scxi-1127/1128 user manual independent mode the scxi-1127/1128 powers up in independent mode. In this mode, you can close or open any switch on the module via ni-switch to the scxi-1127/1128. All software-controllable switche...
Page 65
Chapter 2 using the scxi-1127/1128 scxi-1127/1128 user manual 2-30 ni.Com figure 2-26. Scxi-1127/1128 relay configuration cjs relay relay channel bank 1 relay channel bank 2 relay channel bank 3 relay channel bank 4 high-voltage rear signal connector ch+ (24:31) ch – (24:31) ch+ (16:23) ch – (16:23)...
Page 66: Specifications
© national instruments corporation a-1 scxi-1127/1128 user manual a specifications this appendix lists the specifications for the scxi-1127/1128 modules. These specifications are typical at 25 ° c unless otherwise noted. Scxi-1127 input characteristics number of relays available as channels ...........
Page 67
Appendix a specifications for scxi-1127 scxi-1127/1128 user manual a-2 ni.Com channel to channel crosstalk ..................50 Ω termination 10 khz .............................................≤ –70 db 100 khz ...........................................≤ –57.79 db 1 mhz ...............................
Page 68
Appendix a specifications for scxi-1127 © national instruments corporation a-3 scxi-1127/1128 user manual physical dimensions............................................. 3.0 by 17.2 by 20.3 cm (1.2 by 6.9 by 8.0 in.) environment operating temperature ..........................0 to 50 ° c storage te...
Page 69: Scxi-1128
Appendix a specifications for scxi-1128 scxi-1127/1128 user manual a-4 ni.Com scxi-1128 input characteristics number of relays available as channels ..............................................32 common-mode voltage channel to channel ..........................300 v rms or dc channel to earth........
Page 70
Appendix a specifications for scxi-1128 © national instruments corporation a-5 scxi-1127/1128 user manual dynamic characteristics maximum operating speed..................... 1200 cycles/s relay operate time (at 20 ° c) ................ 0.25 ms typical, 0.5 ms max relay release time (at 20 ° c) .......
Page 71
Appendix a specifications for scxi-1128 scxi-1127/1128 user manual a-6 ni.Com pollution degree 2 indoor use only.
Page 72: Accessories
© national instruments corporation b-1 scxi-1127/1128 user manual b accessories this appendix lists various national instruments products you can use with your scxi-1127/1128 module. • the scxi-1331 terminal block has screw terminal connections for all channels, bank commons, analog bus, and trigger...
Page 73
Appendix b accessories scxi-1127/1128 user manual b-2 ni.Com contact national instruments for more specific information about these products..
Page 74: Customizing Your Module
© national instruments corporation c-1 scxi-1127/1128 user manual c customizing your module this appendix describes how to customize your scxi-1127/1128 module for current-loop receiving. The scxi-1127/1128 modules have plated through holes for transforming individual channels to current-to-voltage ...
Page 75
Appendix c customizing your module scxi-1127/1128 user manual c-2 ni.Com 1. Ground yourself via a grounding strap or a ground connected to your scxi chassis. Properly grounding yourself prevents damage to your scxi module from electrostatic discharge. 2. Remove the grounding screw from the top cover...
Page 76: Scxi-1127/1128
© national instruments corporation d-1 scxi-1127/1128 user manual d scxi-1127/1128 front connector this appendix contains connector diagrams for the scxi-1127/1128 switch cards. The diagrams also show the signal names that are used when the modules are in 2-wire mode, 1-wire mode, 4-wire mode, and 4...
Page 77
Appendix d scxi-1127/1128 front connector scxi-1127/1128 user manual d-2 ni.Com figure d-1. Scxi-1127/1128 front connector pin assignments for 2-wire mode 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 ch2+ ch2– ch5+ ch5– ch8+ ch8– ch11+ ch11– ch14+ ch14– ch17...
Page 78
Appendix d scxi-1127/1128 front connector © national instruments corporation d-3 scxi-1127/1128 user manual figure d-2. Scxi-1127/1128 front connector pin assignments for 1-wire mode 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 ch2 ch34 ch5 ch37 ch8 ch40 ch1...
Page 79
Appendix d scxi-1127/1128 front connector scxi-1127/1128 user manual d-4 ni.Com figure d-3. Scxi-1127/1128 front connector pin assignments for 4-wire mode 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 ch2a+ ch2a– ch5a+ ch5a– ch8a+ ch8a– ch11a+ ch11a– ch14a+ c...
Page 80
Appendix d scxi-1127/1128 front connector © national instruments corporation d-5 scxi-1127/1128 user manual figure d-4. Scxi-1127/1128 front connector pin assignments to create an 4 × 8 matrix 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 c2+ c2– c5+ c5– c0+ ...
Page 81
Appendix d scxi-1127/1128 front connector scxi-1127/1128 user manual d-6 ni.Com table d-1. Front connector signal description signal name type description +5 v(iso) output +5 vdc isolated source—powers the temperature sensor on the terminal block gnd output ground cjs ± input cold-junction temperatu...
Page 82: Common Questions
© national instruments corporation e-1 scxi-1127/1128 user manual e common questions this appendix addresses common questions you may have while using your scxi-1127/1128 module. How fast can i scan with the scxi-1127/1128 module? The fastest scan rate for the scxi-1127 is 100 scans/s, and the faste...
Page 83
Appendix e common questions scxi-1127/1128 user manual e-2 ni.Com • if you use the scxi-1127/1128 to initiate the scan, make sure the dmm is waiting for a trigger before enabling scanning on the scxi-1127/1128. • if you use the dmm to initiate the scan, enable scanning on the scxi-1127/1128 before c...
Page 84
Appendix e common questions © national instruments corporation e-3 scxi-1127/1128 user manual behind slots 3 and 4 you have connected the rows between slot 3 and 4 which creates a 4 × 16 matrix. Now install the two 1-slot adapters behind slots 1 and 2. Connect the two 1-slot adapters together with a...
Page 85: Technical Support Resources
© national instruments corporation f-1 scxi-1127/1128 user manual f technical support resources web support national instruments web support is your first stop for help in solving installation, configuration, and application problems and questions. Online problem-solving and diagnostic resources inc...
Page 86: Worldwide Support
Appendix f technical support resources scxi-1127/1128 user manual f-2 ni.Com worldwide support national instruments has offices located around the world to help address your support needs. You can access our branch office web sites from the worldwide offices section of ni.Com . Branch office web sit...
Page 87: Glossary
© national instruments corporation g-1 scxi-1127/1128 user manual glossary prefix meanings value n- nano- 10 –9 µ- micro- 10 – 6 m- milli- 10 –3 k- kilo- 10 3 m- mega- 10 6 g- giga- 10 9 symbols ° degrees Ω ohms % percent ± plus or minus a a amperes ac alternating current ade application development...
Page 88
Glossary scxi-1127/1128 user manual g-2 ni.Com c c celsius channel pin or wire lead on the multiplexer to which you apply or from which you read the analog or digital signal. Signals can be single-ended or differential. Cjs cold junction sensor cold-junction compensation a method of compensating for...
Page 89
Glossary © national instruments corporation g-3 scxi-1127/1128 user manual h handshaking the use of two trigger lines between two instruments, such as a switch and a dmm, to synchronize their actions hardware-timed scanning the measurement instrument communicates via digital trigger signals hvab hig...
Page 90
Glossary scxi-1127/1128 user manual g-4 ni.Com r random scanning scanning the channels in a mux in any order relay a switch that connects or disconnects the signal to a common through the physical movement of a metal arm rma return material authorization rms root mean square—the square root of the a...
Page 91
Glossary © national instruments corporation g-5 scxi-1127/1128 user manual soft front panel a graphical program included with ni-switch that you can use to interactively control the switch software scanning a method by which channels are selected through the software synchronous scanning hardware-ti...
Page 92
Glossary scxi-1127/1128 user manual g-6 ni.Com w w watts wire data path between nodes.
Page 93: Index
© national instruments corporation i-1 scxi-1127/1128 user manual index numbers 1-wire channel scanning configuration, 2-5 to 2-6 block diagram, 2-5 wiring diagram, 2-6 1_wire_lo_ref signal description (table), d-6 one-wire channel scanning configuration, 2-5 to 2-6 2-wire channel scanning configura...
Page 94
Index scxi-1127/1128 user manual i-2 ni.Com d daq devices accessing scxi-1127/1128 through other scxi modules, 1-18 to 1-20 pxi-1010 chassis, 1-20 pxi-1011 chassis, 1-20 dmm (digital multimeter). See external dmms; ni dmm. Dynamic characteristics scxi-1127, a-2 scxi-1128, a-5 e environment specifica...
Page 95
Index © national instruments corporation i-3 scxi-1127/1128 user manual connecting scxi-1127/1128 to dmm in single chassis system, 1-5 to 1-9 items required, 1-5 single 4-slot chassis configuration, 1-6 to 1-7 single 12-slot chassis configuration, 1-8 to 1-9 connecting scxi-1127/1128 to external dmm...
Page 96
Index scxi-1127/1128 user manual i-4 ni.Com temperature measurements, 2-17 to 2-20 rtd measurements, 2-19 thermistor measurements, 2-19 to 2-20 thermocouple measurements, 2-17 to 2-19 n ni developer zone, f-1 ni dmm connecting scxi-1127/1128 in multichassis system, 1-10 to 1-16 4-slot and 4-slot mul...
Page 97
Index © national instruments corporation i-5 scxi-1127/1128 user manual scanadvd signal description (table), d-6 handshaking scanning, 2-15 to 2-16 hardware timed scanning, 2-12 scanner operation. See multiplexer/scanner operation. Scxi chassis, installing scxi-1127/1128 into. See installation. Scxi...