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USER GUIDE
SCC-ACC01 Accelerometer Input
Module
Conventions
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The SCC-ACC01 accelerometer (ACC) input module accepts an active
accelerometer input signal, passes it through a 0.8 Hz highpass filter,
amplifies it, and then passes it through a 19 kHz lowpass Bessel filter and
an output buffer. The module has a fixed gain of 2, so the maximum input
range is ±5 V. The SCC-ACC01 also provides a 4 mA current source for
accelerometer excitation.
The following conventions are used in this guide:
Angle brackets that contain numbers separated by an ellipsis represent
a range of values associated with a bit or signal name—for example,
P0.<3..0>.
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
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 be
hot. Touching this component may result in bodily injury.
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Table of Contents
Related Manuals for National Instruments SCC-ACC01
Summary of Contents for National Instruments SCC-ACC01
- Page 1 19 kHz lowpass Bessel filter and an output buffer. The module has a fixed gain of 2, so the maximum input range is ±5 V. The SCC-ACC01 also provides a 4 mA current source for accelerometer excitation.
- Page 2 SC-2345 SC-2345 refers to both the SC-2345 connector block and the SC-2345 with configurable connectors. SCC refers to any SCC Series signal conditioning module. SCC-ACC01 Accelerometer Input Module User Guide ni.com...
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Page 3: What You Need To Get Started
What You Need to Get Started To set up and use the SCC-ACC01, you need the following items: ❑ SC-2345/2350 with one of the following: – SCC-PWR01 – SCC-PWR02 and the PS01 power supply – SCC-PWR03—requires a 7 to 42 VDC power supply (not included) ❑... -
Page 4: Device Specific Information
Refer to the Read Me First: Safety and Radio-Frequency Interference document before removing equipment covers or connecting/disconnecting any signal wires. You can plug the SCC-ACC01 into any analog input socket on the SC-2345. It can function as a single-stage module or as the first stage of a dual-stage signal conditioning configuration. -
Page 5: Using The Scc-Acc01
– Coupling Filter Figure 1. SCC-ACC01 Signal Connections The signal source can be floating or ground-referenced. The SCC-ACC01 input circuitry includes high-impedance bias resistors typically required for floating sources. External bias resistors connected to ground are not required. For floating signal sources in high-noise environments, connect the negative terminal of the signal source to the AI GND terminal on the SC-2345 screw-terminal block to reduce common-mode noise. -
Page 6: Specifications
, or g. Note Step 1 provides proper scaling for the amplifier in the SCC-ACC01 if the module is not configured using MAX. Specifications These ratings are typical at 25 °C unless otherwise stated. -
Page 7: Transfer Characteristics
Transfer Characteristics Gain ............2 Gain transfer –20 Gain (dB) –40 –60 –80 –100 1 . 10 1 . 10 1 . 10 1 . 10 0.01 Frequency (Hz) © National Instruments Corporation SCC-ACC01 Accelerometer Input Module User Guide... -
Page 8: Amplifier Characteristics
Offset-error temperature coefficient ..±1.6 µV/°C Nonlinearity ..........10 ppm of full scale Recommended warm-up time....5 min Amplifier Characteristics Common-mode rejection ratio....80 dB at 60 Hz Output range ...........±10 V Excitation Number of channels........1 Constant-current source ......4 mA SCC-ACC01 Accelerometer Input Module User Guide ni.com... -
Page 9: Power Requirement
Channel-to-channel (inputs)....42 VDC, 30 V Installation Category I Environmental Operating temperature......0 to 50 °C Storage temperature ....... –20 to 70 °C Relative humidity ........10 to 90%, noncondensing © National Instruments Corporation SCC-ACC01 Accelerometer Input Module User Guide... -
Page 10: Electromagnetic Compatibility
Refer to the Declaration of Conformity (DoC) for this product for any additional Note regulatory compliance information. To obtain the DoC for this product, visit , search by model number or product line, and click the ni.com/hardref.nsf appropriate link in the Certification column. SCC-ACC01 Accelerometer Input Module User Guide ni.com... -
Page 11: Scc-Acc01 Module Pin Assignments
±15 V supplies and REF 5 V. AI GND and A GND connect to the SC-2345 at the SCC-PWR connector. GND is the reference for the +5 V supply. Table 1. SCC-ACC01 Module Pin Assignments Pin Number Signal E Series AI (X) E Series AI GND —... - Page 12 *32xxxxA-01* 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 in your software, the patents.txt file on your CD, or ni.com/patents.