Rogue wired sensor

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  Currently, WCS provides rogue access point detection by retrieving the controller information. Rogue access point table is filled with the addresses BSSID detected all frames that are not present in the list of neighbor. At the end of a specified interval, the contents of the table of thugs is sent to the controller in a Lightweight Rogue AP report message. With this method, WCS would bring together all simply the information provided by the controllers; but with software version 5.1, you can now integrate tracing switch switch coelio port, point rogue wired. This improvement allows to react to found the rogue access points wired and prevent future attacks. Tracing information are available in the journal of WCS and only for rogue access points, not rogue clients.

  http://www.Cisco.com/en/us/docs/wireless/WCS/5.2/configuration/guide/5_2ctrlcfg.html#wp1089752

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• The SCB-68 wiring diagram

  Hello all,.

  I have a beautifully SCB-68 connector block 68 pins. Can anyone provide me with the wiring diagram?

  I went through the guides provided, but I have a few questions.

  (1) how exactly work the switches?

  (2) what is the need to provide + 5v to the part of conditioning of signals? (As for signal conditoning, we use some resistors and capacitors)

  (3) where do we always connect us our signal? It is always the terminals screw or is it depends on the requirement of signal conditioning?

  (4) if we use a conditioning of signals, which are input terminals? And what con terminals signals reaching data acquisition?

  Concerning

  -Vaidhin.

  Hey,.

  the Circuit diagram is shown to these PDF on page 82-83. (SCB-68 68-pin shielded connector manual user Block)

  The sensor you want to use is never connect with the Terminal screw,

  The switches have the following functions:

  S1--> 5V supply

  S2--> DGND

  S3--> AIGND

  S4--> PES or differential measurement

  S5--> (cold junction Compensation) CJC

  Best regards

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• sensor pressure and USB-6210

  I am installing a USB-6210 to read pressure sensors (specifically: http://www.omega.com/pptst/PX309-100mv.html), with labview2013.

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  It turns out that my diet was not come out correctly. Passed to a diet different and everything works as it should.

• Wiring - PXI-6624

  Hi all -

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  Cordially - in the short term, I have 1 sensor which will include rpm for 1 pulse per turn.  We also want to make direction which will need a second sensor with the set of two upward slightly as the squaring function requires.  Only two will have only 1 pulse per revolution, rather than an encoder with say 120 pulses per rev.  Should subsequently over them both, but I think that if I can figure out exactly one that I can use it to understand the rest of the installation on my own :-)

  Thanks a bunch!

  External connections:

  Commune of sensor connected to the source - meter

  The connected sensor signal to source + meter

  Any signal of door that you would use for this application would be generated internally by using another counter and then routed internally to the door of the counter which counts the external pulses.  In this case the door signal would provide a specific window of time count impulses.  An example could be measure RPM.  If you decide to measure the pulse for a full minute, with accuracy what a minute?  If you do not exactly one minute, your RPM will be incorrect.  Calendar of the software will not work.

• Pressure sensor ground loop problem

  Hello

  I have an interesting problem, I hope someone can help me with.

  I'm measuring pressure with a pressure sensor.  We see a lot of noise with the measure, and I believe that we have a ground loop.  I have checked the noise is 60 Hz.  What is interesting is that the case of the pressure sensor is connected to the Earth.  When we put on the sensor of metal pressure in the booth, we see the noise.  When disconnect us the stand noise pressure sensor disappears.  The stand is connected to the Earth.  I'm feeding the sensor with a 24V power supply which is also connected to the Earth.  I think that this is the ground loop.

  My problem is that the 24V power supply should be grounded for safety and the I cannot isolate the ground pressure sensor.

  I attached how I got the system wired.  How to connect up to my analog input module pressure sensor OR 9215 to break the ground loop?

  Thank you

  Dan

  Ahhhh Yes,

  I have solved this problem.  It is a ground loop.  I had the field related to 2 places.

  We have removed one of the references on the ground and poof everything worked fine.

  One of the problems I've found is a reference of external power supplies and others do not.  If you provide an additional reference to the Earth... Ground loop!

  Ground loops can be mean terrible things.  According to my experience, they are the number one electric goofiness and the noise causes.

  I have compiled some resources on my website to help people

  http://www.autosofttech.NET/resources

  The best is field wiring and considerations of noise for analog signals

  If you want the final word on the subject see this book

  Techniques of reduction of noise in electronic systems

  Hope that helps!

• Connect 3 wire sensor in correct way NI 9209

  Hello

  I have several sensors of absolute pressure with only three wires (a common thread, an excitement + and signal output +). I enclose the form in pdf format. I need to connect about 6 of these sensors to my NI9209 card inside a cDAQ chassis. I also have a power supply of 24 VDC. I would like to ask about the proper connection if I want to use the differential voltage measurement.

  Can I just wire the elements in the following way (left photo), or do I have to follow the recommended wiring as described in the manual on page 14, the part 'floating differential connections' ( http://www.ni.com/pdf/manuals/376909c.pdf ), right? Thank you!

  Edit:

  If I have to use the resistance of 1 MOhm, is it enough to use a single resistor connected between the pin of the NI of COM map and all the pressure sensors COM ports?

  

  You need to have the input of COM on the module HAVE referenced in your municipality.  However, if all your sensors are out of the ordinary even running, you need not the resistance of 1 M.  The only reason why neither mentions that this connection is for incoming signals not referenced to the commune.  Given that this sensor is only to give you a single output is completed, it would be much easier to just run the signal is broadcast to the module I and connect the COM to the power supply.  Otherwise, you basically jump the COM signal toward the low side of each measure and the reference measurement to COM in any case.

• We can connect the output of the sensor directly to the DAQ hardware or any interface necessary?

  We can connect the output of the sensor directly to the DAQ hardware or any interface necessary? If so wat kinda necessary interface?

  How to change the sensor output to match entry-level data acquisition?

  If the sensor output beyond daq range is provided. What are its effects? pls answer

  -It depends on your signal and the type of device you have. Your DAQ provides a package of signals? Also, what type of signal you want to measure? You must select DAQ that matches that. Take a look at the following before you start:

  Getting started with NO-DAQmx: Main Page

  And take a look at table 1 in the following article to wire your signal to the right:

  Wiring and considerations of noise for analog signals

  -You will need to use external circuitory to match the input of data acquisition range.

  -You could damage the unit.

  If you have any other questions, please after return. And, don't forget to give more details about your configuration, the hardware and what you're trying to do.

• The addition of IR sensors to sbRIO-9631.

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  Hello Defested,

  In the sbRIO-9631 operating instructions , that you can see on page 12, Figure 9, that the J7 connector allows you to access the analog I/o. This is where you do not use a C Series module. You can connect your sensor in several ways: CSR, NRSE and differential.

  You can see the article field wiring and considerations of noise for analog signals for more information on how to wire your sensor. We recommend to use a differential connection in case you have several sensors and are concerned about the loyalty of the signals. In the case where your sensor is a floating signal source, you would want to addition of polarization resistance of AI - AI GND.

• Out of reading 2-wire 4-20mA pressure sensors using the NI9203 module

  Hi all, I'm sure that a lot of people can give a response would we apply for this.

  While looking at the wiring diagram on some pressure transmitters (2 wire 4-20 mA output, direct wire), that I'm about to buy, I noticed a slight inconsistency with the wiring in the NI9203 manual. Here are links to manuals for sensors:

  Swagelok pressure transducers

  Following the manual of NI9203, the + ve terminal of power supply (24Vdc in my case) must be connected to the Brown Terminal in the transducer and - ve supply ground COM on the NI9203. This leaves the Green Terminal in the transducer must be connected to AI0... AI7 on the NI9203 module. This provision makes perfect sense to me. However, the user for the transducer manual suggests that the Terminal green must be wired to zero volts land i.e. COM. This configuration makes less sense to me.

  My question is, the internal electronics of the transducer released still the same my current for the same measured pressure given by the curves of calibration for sensor, even if the Green teminal is not connected to zero volts?

  I have a hunch it's okay, but I wanted to be sure before that I lost many years spent money / bad record pressure. This should be a matter for manufacturers of sensors I know, but I found this forum is * much * more useful!

  See you soon,.

  Chris

  Hi Chris,

  The 9203 is a device for current descendant be plugged on one side common or 0 volt.  You must connect your pressure in 2 wire mode sensor.

  + 24 v DC to the positive terminal on your sensor pressure 1 terminal or brown flying lead, Terminal 2 green flying lead is connected to AIx on your 9203 and the commune of the 9203 connected to 0 Volts on your power supply.

  All 2-wire device used in a current input down is still as cable + volts then 2-wire device + then then 2-wire device - (or 0) then HAVE + then common then 0 volt.

  In my experience the 9203 can be rather prone to noise pick up devices with 2 sons and need a suitable clean power supply.  For 2-wire devices, I take 1024 readings and then averaged to reduce noise.

  See you soon

  Stephen

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