PC able to detect all except for the analog output channel of my SCB-68 device.

[rezn]

I would like to use the analog output channel of my SCB-68 device. I tried to locate the analog o/p using the wizard but still unable to detect. Why is that so?
Any possible steps/procedure that i have missed out?

Thanks

[markwysong]

The SCB-68 is a connector block that connects to some type of acquisition device. Which acquisition device is connected to it?

Mark

[rezn]

Hi mark,

I have just started to learn labview last month thus there are still many things which i dun really understand.
Right now....i would need to use the scb-68 to send a signal to the analog output to control the states of a relay....but the problem is that my DAQCard-A1-16XE-50 could not detect the analog output of the device but it is working fine for both digital & analog input.
Do advice...thanks.

[<Mike Ross> mross@smpcorp.com]

Rezn,

Can you restate this? You indicate you want to detect an analog output (seemingly generated by the DAQCard). This is not logical.

Can you give a block/functional diagram of the system you are trying to use?

Mike

[Filipe A.]

Hello;

I don't know what you mean by the PC is unable to detect the analog output channels, however, the SCB-68 is a terminal block only, which will follow the pinout of the DAQ device you are using together with it.

To test the analog output channels of your DAQ device, run the Measurement and Automation Explorer Software, go to test panel and choose the Analog Output pallet. Then, run a sinewave on the analog output channels, and check with a Scope if the waveform is being generated.

Hope this helps.
Filipe A.
Applications Engineer
National Instruments

[markwysong]

Rezn,

Aha, therein lies the problem. This was what I suspected, and thus my question as to which data acquisition card you are using. The DAQCard-AI-16XE-50 has analog inputs, digital I/O, but no analog outputs at all. So your card is working as it should, but it has no analog outputs.

If you have the 2002 National Instruments catalog, you can see this in a table on page 231 (your DAQ card is the one on the bottom), or check this pdf file:

http://www.ni.com/pdf/products/us/2mhw254-255e.pdf

Your card is also called the NI6012E. Check out the small table on the first page.

Mark

[markwysong]

Also, even if this card did have analog outputs, I'm not sure they could supply enough current to drive a standard relay coil.

I've used them for turning on a solid state relay, but the analog output current is limited to 5 mA max.

Just FYI.

Mark

[rezn]

Mark,

thank you v much for ur help...it really helped to solve my problem.....Now i will try to use another card PCI 6035....it has the analog o/p that i need.....thanks again!!

rezn