Wiki source code of cRIO-TRF-P01

Last modified by Michael Sibayan on 2022/05/03 16:48

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1.1	1	[[image:cRIO-TRF-P01.jpg]]
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	3	__Module 1 (NI-9401)__
	4	* 8 channel digital I/O set up as a pulse counter.
	5	* Used to monitor pulses from anemometers
	6	* Terminal block in the upper right provides power (through a resistor) to the anemometers.
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	9	__Module 3 (NI-9205)__
	10	* 16/32 channel +/-10V analog input
	11	* First 16 channels set up in +/-1V differential mode for the pyranometers and quantum sensors
	12	* Last 16 channels set up in +/-5V referenced single ended mode for the HMP45 temp/RH sensors
	13	* Common is tied to the 12VDC power supply negative terminal (for RSE channels)
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	15	__Module 5 (NI-9213)__
	16	* 16 channel +/- 75mV differential analog input
	17	* First four channels measure light sensor signals
	18	* Channel 5 measures voltage of the PT100 thermistor
	19	* Common is tied to the shields and the 12VDC power supply negative terminal (for PT100)
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	22	__0.5mA current source__
	23	* Provides approximately constant 0.5mA current for the PT-100 thermistor
	24	* 0.5mA chosen to put the signal voltage within range of the NI-9213 AI module (approximately 50mV)
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	27	__Anemometer terminal block__
	28	* Provides 5VDC, through a resistor, to the anemometers
	29	* 5V chosen to match the TTL level of the NI-9401 DIO module
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