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Function
high
middle
low
closed
DI 1
DI 2
Operating mode 7
3 .5 . 7 2-point operation with switchover of the adjustment
angle for the "open" position
Operating mode 7
In idle state (DI 1 and DI 2 with no signal), the actuator is in "low"
position ("low" position may also be 0° = "closed" position).
Digital input DI 1 functions as a pulse input.
DI 2 has no signal:
The actuator operates in high/low (high/closed) inter-
mittent mode via digital input DI 1.
Signal at DI 2:
The actuator can switch over its intermittent mode be-
tween high/low (high/closed) and middle/low (middle/
closed) during ongoing operation.
The adjustment angle for the "open" position is then ap-
proached with signal at DI 1 and switched over via DI 2.
IC 40 · Edition 07.18
t
t
1
2
The actuator now operates in middle/low (middle/
closed) intermittent mode via digital input DI 1.
The heat output can now be reduced and it is never-
theless possible to continue operation in intermittent
mode so as to ensure a uniform temperature distribu-
tion. High/low may also be used for purging and mid-
dle/low may also be used for heating mode in order to
reduce the pre-purge time, for instance.
DI 1
DI 2
Off
Off
On
Off
Off
On
On
On
▼
t [s]
t [s]
Position
low/closed
high
low/closed (DI 1 has priority)
middle
23
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