User Manual

En
T is
busy
Q
T
L
T
H
The bold section of the timing
diagram also appears in the
symbol of the random generator.
IDEC SmartRelay functions
IDEC SmartRelay Manual 145
Timing diagram
Functional description
The 0 to 1 transition at input En triggers a random on-delay
time be
tween 0 s and T
H
. The output is set when the on-
delay time has expired and if the signal at input En remains
hi at least for the duration of this time.
The time is reset if input En is r
eset before the on-delay time
has expired.
A 1 to 0 transition at input EN triggers a random off-delay
time be
tween 0 s and T
L
.
The output is reset after the off-delay time has expired,
pr
ovided input En remains lo at least for the duration of this
time.
The time is reset if the signal at input En changes to 1 ag
ain
before the off-delay time has expired.
The time expired is reset after a power failure.