Rajesh Kallur New Member Posts:3  
| 01/26/2011 1:14 PM |
|
|
hi!
i have got CR 5210-10 and CR 5210-300 current transducer, and am building a test stand with DAQ. What I want to know is that when you say supply is 24V +- 10% it means that there is an isolation amplifier/voltage regulator between the supply circuit and and the transducer circuit, right? I need to make sure about this, as I don't want noise in the transducer output,given that my supply can have around 1V spikes at times. Please clarify this, else I need to think of routing the supply through some kind of isolation/regulator(meaning more complications!!).
Thank you!
|
|
|
|
Tony HodgesCRM Staff  Basic Member Posts:154
| 01/26/2011 2:06 PM |
|
|
Dear Sir,
Isolation is between the input current and output signal/power supply. The output signal is referenced to the same ground as the power supply. This is standard insulation which is our standard product line and what you have. Treble insulation is between output, input, and power supply. This is available by special order.
1 volt spikes on the 24 VDC power supply should not be a problem if they are at 10Khz and below frequency. Higher frequency spikes on the power supply may require additional power supply filtering. There are input filter on all products.
|
|
|
|
Rajesh KallurNew Member Posts:3
| 01/27/2011 4:51 PM |
|
|
Thanks for the reply!
But what i don't get is, how are you going to regulate the voltage if it can allow +-10% supply voltage. also, going by what you said, there would not be output noise problem (under 1kHz) because there is some kind of voltage regulator at the supply side right?
I ask this because i have about 5 sensors that are referenced to the same supply. i am trying to eliminate output signal noise(if any) due to the fluctuation in the common mode voltage. These are some high accuracy dependent experiments that i am doing, which is why i want to be absolutely sure about it.
|
|
|
|
Tony HodgesNew Member Posts:1
| 01/31/2011 9:57 AM |
|
|
As explained before, the power supply input is filtered, regulated, and has provisions for improper connection, namely switching the plus and minus connections. It is also internally regulated. CR Magnetics provides paid for services to proper calibrate specific transducers when customers require power supply operation outside of the normal 24VDC +/-10%.
High frequency noise on the power supply can be a problem depending on the customer's circuit configuration. Impedance of the customer power supply and of the output burden connected will determine how the system will behave. The design of the transducer circuitry is a balance between cost and performance and is intended to provide acceptable performance in typical applications.
|
|
|
|