Using SE channels to read wet/dry contacts._Campbellsci论坛问答

oceaner 2023-04-15 0 138 次浏览仪器使用 Campbellsci Using SE channels to read wet/dry contacts 论坛

Hello,

I am using up a bunch of our CR1000 control ports reading wet/dry contacts and I'm running out. I looked at expanding the control ports with a SDM-CDXX module but budgets killed that idea. Anyway, is there a way to use an SE port to do the same thing? Maybe excite the channel and if it's > 0 it's closed etc?

新对话如下：

Yes but you will need to bias the input to ground using a resistor. The control ports have a built-in pull down resistor, whilst there is not one on the analogue inputs.

新对话如下：

if you are just looking for wet and dry contacts meaning you dont' have any voltages you might also find success with the pulse ports looking for the continuity edge when the probe leads connect with water.

Mike
mlusk@Inmtn.com

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