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Chapter 14 SCXI Hardware
©
National Instruments Corporation 14-19 DAQ Hardware Overview Guide
input gain within the allowable range of X0.8 to X25. Use
SCXI_Set_Excitation to set the excitation level and frequency. The
allowable level settings are 1 V
rms
and 3 V
rms
. The allowable frequency
settings are 2.5, 3.3, 5, or 10 kHz. Use
SCXI_Configure_Connection to
set the wiring configuration to 4-wire or 5-wire and to enable external
synchronization for channels that need their frequency slaved to a master
channel.
The SCXI-1540 also has an onboard EEPROM that has gain and offset
calibration constants for each channel on the module. NI-DAQ
automatically uses these constants in the
SCXI_Scale function to
compensate for amplifier gain and offset errors when scaling binary data to
voltage data. You can initiate a loop-back calibration at any time by calling
the
SCXI_Calibrate, which updates the user calibration constants in
EEPROM.
SCXI_Calibrate is also used to overwrite these constants
with the original factory-calibration data.
The SCXI-1315 terminal block provides a convenient method of
connecting field wiring from LVDTs, RVDTs, and resolvers to the front
signal connector of the SCXI-1540.
MIO and AI DAQ Devices (Except Parallel Port Devices)
The MIO and AI DAQ devices (except parallel port devices) support the
following analog input functionality when using the SCXI analog input
modules:
• Single-channel analog input using the analog input functions described
in Chapter 3, Software Overview, of the NI-DAQ User Manual for PC
Compatibles.
• Single-channel data acquisition using the data acquisition functions
described in Chapter 3, Software Overview, of the NI-DAQ User
Manual for PC Compatibles.
• Multiple-channel and interval scanning using the
SCAN functions
described in Chapter 3, Software Overview, of the NI-DAQ User
Manual for PC Compatibles.
You also can use the analog output modules and digital modules in
multiplexed mode with the MIO and AI devices (except parallel ports).
If you are using analog input modules with digital or analog output
modules, you must cable the MIO or AI device to an analog input module.
It is important to remember that when a DAQ device is cabled to an SCXI
module, some of the DAQ device I/O connector pins and therefore some of
the device resources will be reserved for SCXI use.
- DAQ Hardware Overview 1
- Important Information 3
- Chapter 14 7
- SCXI Hardware 7
- Glossary 10
- Contents 11
- About This Guide 12
- MIO and AI Device Terminology 15
- Table 1 16
- Related Documentation 17
- MIO and AI Devices 18
- Chapter 1 MIO and AI Devices 19
- E Series Data Acquisition 20
- Set_DAQ_Device_Info 22
- MIO Device Analog Output 24
- E Series Digital I/O 26
- E Series PFI Pins 27
- Lab and 1200 Devices 28
- AI_Trigger_Config.vi 31
- DAQ_StopTrigger_Config 31
- Table 2-2 32
- Lab and 1200 Devices Groups 33
- Figure 2-1 34
- 1200 Device Acquisition Rate 35
- 1200 Device Calibration 36
- LPM Devices 37
- DAQ_Config 38
- LPM Device Digital I/O 39
- LPM Device Counter/Timers 40
- 516 Devices and 41
- DAQCard-500/700 Devices 41
- DAQ_Config. If you do 43
- Counter/Timer Operation 44
- Figure 4-2 45
- AT-AO-6/10 Analog 46
- Output Devices 46
- AT-AO-6/10 Digital I/O 48
- 6703/6704 Devices 49
- PC-TIO-10 Timing I/O Device 50
- PC-TIO-10 Counter/Timers 54
- PC-TIO-10 Digital I/O 55
- DIO-96 Digital I/O Devices 56
- DIO-96 Groups 57
- DIO-24 (6503) 58
- AT-MIO-16DE-10, and 6025E 58
- DIO-32F and 6533 60
- Digital I/O Devices 60
- Digital_Buffer_Write.vi) 62
- AMUX-64T External 63
- Multiplexer Accessory 63
- Table 11-2 64
- AMUX-64T Channel Numbers 64
- SCAN_Setup or 65
- MIO_Config 67
- Accessories 68
- SC-2042-RTD Accessory 69
- SC-2043-SG Accessory 69
- SCC Series Modules 70
- SCC-CI20 Current Input Module 72
- SCC-LP Lowpass Filter Modules 73
- SCC Configuration 74
- SCXI Operating Modes 76
- Chapter 14 SCXI Hardware 77
- SCXI Data Acquisition Device 80
- SCXI-1200 80
- SCXI Analog Input Modules 81
- SCXI-1100 81
- SCXI-1101 82
- SCXI-1104/C 83
- SCXI-1112 83
- SCXI_Scale function to 84
- SCXI_Single_Chan_Setup 84
- SCXI-1125 85
- SCXI-1122 85
- SCXI-1126 86
- SCXI-1127 87
- SCXI-1140 87
- SCXI Analog Output Module 89
- SCXI-1124 89
- SCXI Digital Modules 90
- SCXI-1160 and SCXI-1161 90
- SCXI-1162 and SCXI-1162HV 91
- SCXI-1163 and SCXI-1163R 91
- SCXI-1530, SCXI-1531 92
- SCXI-1540 92
- SCXI_Track_Hold_Setup 94
- DIO-24 and the DIO-96 96
- DIO-32F and 6533 Device 97
- VXI-DAQ Devices 99
- AO_Change_Parameter or the 100
- Multifunction VXIbus Devices 101
- VXI-DAQ Signal Conditioning 102
- VXI-SC-1102 Submodule 103
- VXI-SC-1150 Submodule 103
- PXI DAQ Devices 104
- PXI DAQ Signal Conditioning 105
- NI 5411 Devices 106
- Chapter 17 NI 5411 Devices 107
- DDS Mode 108
- Table 17-2 110
- NI 5411 Operational Modes 110
- Device Analog Input 112
- Data Acquisition 113
- Acquisition Timing 114
- Current Source 115
- Digital I/O 115
- Device Input 116
- Chapter 19 NI 40XX Devices 118
- DSA Devices 119
- and NI 455 120
- Analog Input Channels 120
- Data Acquisition Timing 121
- Channels 122
- Digital I/O 123
- Counter/Timer Operation 124
- Devices 125
- Chapter 21 671X Devices 126
- Technical Support Resources 129
- Worldwide Support 130
- Numbers/Symbols 131
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