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General => Technical support => Topic started by: Fernandz on October 30, 2003, 02:41:03 PM

Title: LM335 IC sensor
Post by: Fernandz on October 30, 2003, 02:41:03 PM

What would be the best way to hook up a LM335 sensor to the analog inputs of the T100MD? Also what formula would i have to use?

Title: Re: LM335 IC sensor
Post by: support on October 31, 2003, 10:08:40 AM

Since the LM335 has output of 10mV/K, you can wire up the sensor such that its output voltage fall within the range of the PLC's analog inputs (0-5V for most PLC or 0-1V for 2 of T100MD1616+)  and then you will be able to measure the voltage. The reading obtain is 0-4092 which can be scaled to units you want.

For other interface circuits for LM335, check with NS data sheet:

http://www.national.com/ds.cgi/LM/LM135.pdf