National Instruments SCC-PWR02 Скачать руководство пользователя страница 5

SCC-LP Series Lowpass Filter Modules User Guide

4

ni.com

Device Specific Information

Note

For general SCC module installation and signal connection information, and 

information about the SC-2350 carrier, refer to the 

SCC Quick Start Guide

, available 

for download at 

ni.com/manuals

.

Installing the Module

Caution

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-LP

XX

 into any analog input socket on the SC-2345. 

It can function as a single-stage module or as the first or the second stage 
of a dual-stage signal conditioning configuration. The socket you choose 
determines which E Series DAQ device channels receive the SCC-LP

XX

 

output signals, as explained in the 

Connecting the Input Signals

 section.

For single-stage conditioning, plug the SCC-LP

XX

 into any socket J(

X

+

1), 

where 

X

 is 0 to 7, and connect the input signals to the module as described 

in the 

Connecting the Input Signals

 section.

The SCC-LP

XX

 can function as either the first or the second stage of a 

dual-stage configuration. Plug the first-stage SCC into any socket J(

X

+9) 

and plug the second-stage SCC into socket J(

X

+1), where 

X

 is 0 to 7. 

Connect the input signals to the first-stage SCC. The SC-2345 connects the 
output signals of the first-stage SCC to the inputs of the second-stage SCC. 
An example of dual-stage conditioning is an SCC-A10 voltage attenuator 
module followed by an SCC-LP

XX

.

Sockets J9 to J16 also are available for digital input/output (DIO) 
conditioning or control. Refer to the 

SC-2345 User Manual

 and 

SCC Quick 

Start Guide 

for more information on configuring, connecting, and 

installing SCC modules.

Connecting the Input Signals

Note

The signal names have changed. Refer to 

ni.com/info

 and enter 

rdtntg

 to 

confirm the signal names.

Each screw terminal is labeled by pin number <1..4>. Pins 1 and 2 form 
a differential channel routed to E Series DAQ device channel 

X

+8, and 

pins 3 and 4 form a second differential channel routed to E Series DAQ 
device channel 

X

, where 

X

 is 0 to 7 depending on the socket where you plug 

in the SCC-LP

XX

.

Содержание SCC-PWR02

Страница 1: ...SCC PWR02...

Страница 2: ...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...

Страница 3: ...an introduction to a key concept This font also denotes text that is a placeholder for a word or value that you must supply monospace Text in this font denotes text or characters that you should enter...

Страница 4: ...ules User Guide SC 2345 2350 User Manual available at ni com SCC Quick Start Guide available at ni com Read Me First Safety and Radio Frequency Interference SC 2345 Quick Reference Label 68 pin E Seri...

Страница 5: ...ibed in the Connecting the Input Signals section The SCC LPXX can function as either the first or the second stage of a dual stage configuration Plug the first stage SCC into any socket J X 9 and plug...

Страница 6: ...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 Figure 1 SCC LPXX S...

Страница 7: ...HX 2 Calculate the SCC LPXX voltage using this formula VLP 2VESERIES where VLP is the SCC LPXX input voltage VESERIES is the E Series DAQ device input voltage Specifications These ratings are typical...

Страница 8: ...rate 80 dB decade 3 dB cutoff frequency fc SCC LP01 25 Hz SCC LP02 50 Hz SCC LP03 150 Hz SCC LP04 1 kHz Passband ripple System Noise Total harmonic distortion THD at fc 90 dB Wide band noise DC to 1 M...

Страница 9: ...V 15 8 mA max Digital power 0 0 mW max Physical Dimensions 8 89 cm 2 92 cm 1 85 cm 3 50 in 1 15 in 0 73 in Mass 37 g 1 3 oz I O connectors One 20 pin right angle male connector one 4 pin screw termin...

Страница 10: ...romagnetic Compatibility Emissions EN 55011 Class A at 10 m FCC Part 15A above 1 GHz Immunity EN 61326 1997 A2 2001 Table 1 CE C Tick and FCC Part 15 Class A Compliant Note For full EMC compliance ope...

Страница 11: ...lay is not constant and the step response exhibits a moderate amount of overshoot ringing These characteristics present no problems in applications where only the amplitude of signal frequency compone...

Страница 12: ...Modules User Guide Figure 3 Typical SCC LP02 Response Curve Figure 4 Typical SCC LP03 Response Curve Frequency Hz Amplitude dB 25 0 1 2 3 4 5 10 20 25 50 100 20 0 15 0 10 0 5 0 0 0 Frequency Hz Ampli...

Страница 13: ...SCC LP Series Lowpass Filter Modules User Guide 12 ni com Figure 5 Typical SCC LP04 Response Curve 1 2 3 4 5 10 20 50 1000 2000 25 0 20 0 15 0 10 0 5 0 0 0 2 5 Frequency Hz Amplitude dB...

Страница 14: ...cteristics of the SCC LPXX Figure 6 Theoretical Transfer Characteristics a Frequency Response 0 0 10 15 0 5 Normalized Frequency f fc Amplitude dB 1 1 5 5 10 20 40 60 80 100 b Group Delay 2 0 1 0 15 0...

Страница 15: ...the magnitude of the step input voltage the normalized step response is 1 VOUT VIN Figure 6a shows that the SCC LPXX provides 80 dB attenuation above ten times the cutoff frequency Figure 6b shows var...

Страница 16: ...rate is known as the Nyquist frequency To prevent aliasing you must remove all of the signal components with frequencies greater than the Nyquist frequency from an input signal before you sample it Wh...

Страница 17: ...6 Input 0 VDC to the SCC LPXX 7 Have the E Series DAQ device read the channel again and record the new value 8 Calculate the difference between the two values you recorded first reading second reading...

Страница 18: ...17 SCC LP Series Lowpass Filter Modules User Guide SCC LPXX Module Pin Assignments Figure 8 shows the I O connector pins on the bottom of the module Figure 8 SCC Module Bottom View 1 Pin 1 2 Pin 2 3 P...

Страница 19: ...X and AI X 8 are the analog input signal channels of the E Series DAQ device AI GND is the analog input ground signal and is the reference for AI X and AI X 8 A GND is the reference for the 15 V suppl...

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