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Animated picture below shows a simple example of negative input usage scenario. There are many alarm buttons, sensors and other accessories that operate on this principle: one alarm button pin is connected to ground (it could be connected to any ground, not necessarily to FMB130 device ground), other pin – to negative input. When the button is pressed, ground is connected and negative input detects it.

Animated picture below shows a simple example of negative input usage scenario. There are many alarm buttons, sensors and other accessories that operate on this principle: one alarm button pin is connected to ground (it could be connected to any ground, not necessarily to FMB140 device ground), other pin – to negative input. When the button is pressed, ground is connected and negative input detects it.

[[File:Negative_input_gif.gif|center|]]

[[File:Negative_input_gif.gif|center|]]