SCC TC 02

[onlylno]

I would like to build a high speed temperature acquisition system. Mutilfunction card is PCI 6289. I need a temperature conditioning card , I want to choose SCC TC02. I am not sure if SCC T02 meed the sampling speed of PCI 6289? 

[Jrida]

You should have no problem using the SCC-TC02 with the PCI-6289 in terms of sampling since the DAQ board will be able to sample at a faster rate than the thermocouple can make significant updates (the 6289 can sample at a rate of 2.8M samples/second). 

What you need to keep in mind is that the SCC-TC02 requires a connector/carrier to interface with the 6289, you can see the required hardware here:

http://www.ni.com/pdf/manuals/371074c.pdf

http://www.ni.com/pdf/manuals/373743d.pdf

One recommendation is the SCC-68, you can find more about it here:

http://sine.ni.com/nips/cds/view/p/lang/en/nid/202603

http://www.ni.com/pdf/manuals/374748b.pdf

[onlylno]

Thank you for your answer.

I also need a AC input to detect voltage zero crossing for this system. Do you think it is possbile using SCC Al01 for AC input? SCC Al01 is for AC or DC?, the speed of SCC Al serials is enough for this purpose?

Do you know if there is some cards for zero crossing of voltage?

Thanks.

[Jrida]

The SCC-AI01 can handle AC and DC inputs, the AC signal would have to be within +/- 42V and less than 10KHz. From here you would have to configure the DAQ device to recognise a zero crossing based on the output from the SCC-AI01.

Here's more infromation on the SCC-AI modules where you can see information about different I/O charachteristics like slew rate:

http://www.ni.com/pdf/manuals/371066d.pdf 

[onlylno]

Thanks you for reply.

You said less than 10KHz, this is the sampling rate? I used a fixed transformer to change 230V, 50Hz into 12V 50Hz. 

[Jrida]

It's not the sampling rate, it's the bandwidth of the low pass filter.

[onlylno]

Do you think SCC-AI01 is good enough to detect Zero crossing of AC (24 V 50Hz)?

[Jrida]

The SCC-AI01 can detect voltages of +/-42v at 10kHz so 24v at 50Hz is within that range and thus can be detected.