Thread: Analog inputs not "working" — I only detect "noise"
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Unread 31-12-2008, 08:06
Russ Beavis Russ Beavis is offline
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Re: Analog inputs not "working" — I only detect "noise"
For starters, is the green LED on the Analog Breakout module on? If not, then the module isn't being properly powered.

HOWEVER, plugging in a 9V battery doesn't require that the Analog Breakout module have power. The analog signals are directly passed (one-to-one) to the NI 9201 analog input module. As mentioned earlier, the 9201 does indeed have a +/-10V input range (survives even higher voltages, I believe) and I'm fairly certain that the FPGA software doesn't limit readings to 0-5V.

Can you read the battery voltage with the jumper installed? You might want to try that first. The reading should even be passed all of the way back to the Driver Station.

You should also confirm that the 9201 is in the chassis slot that you're expecting. You might be sampling the analog input from the other 9201 in your cRIO chassis.

Good Luck. Hope the above helps.

Russ