Emerson Control Techniques Epsilon Eb Series Reference Manual page 70

Setting Up Parameters
Making an input function "Active On" means that it will be active when +10 to 30 VDC is
applied to the input line it's assigned to and is inactive when no voltage is applied to the line.
Making an input function "Active Off" means that it will be active when no voltage is applied
to the input line and inactive while +10 to 30 VDC is being applied.
Always Active Check Box
This check box is used to make an input function "Always Active". When you make an input
function always active, it's active whether assigned to an input line or not. If you make an
input function "Always Active" then assign it to an input line, that function will be active
whether or not voltage is applied to the line it is assigned to.
Input Lines Window
Debounce
The debounce value is displayed next to each input line. See "Debounce" below.
Functions assigned ...
This feature displays the Input Function assigned to each particular Input Line.
Debounce
This feature helps prevent false input triggering in noisy electrical environments. Enter a
"Debounce Time" in milliseconds. The value entered here is the minimum amount of time the
input line will need to be active before it is recognized as a valid input.
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