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Function
high
middle
low
closed
DI 1
DI 2
Operating mode 27
3 .6 . 7 2-stage operation with two digital inputs and
variable adjustment angle for the "open" position
Operating mode 27
In idle state (DI 1 and DI 2 with no signal), the actuator
is in "closed" position and the butterfly valve is closed.
If a signal is applied to DI 1 (DI 2 with no signal), the
butterfly valve moves to "low" position (ignition position
and low-fire rate position).
If a signal is applied to DI 2 (DI 1 with no signal), the
butterfly valve moves to "high" position for pre-purge
(high-fire rate).
If a signal is applied to DI 1 and DI 2, the butterfly valve
can be moved steplessly via the analogue input. The
possible adjustment range is between 0% and 100%.
The adjustment angle for the "open" position, which can
IC 40 · Edition 07.18
t 1
t 2
t 3
t 4
t 5
t 6
be varied via the analogue signal, is set in BCSoft.
Example: 4 mA for 60% opening and 20 mA for 100%
opening.
DI 1
DI 2
IC 40 position
Off
Off
closed
On
Off
low
On
On
analogue chart 1
Off
On
high
Example of application, see page 9 (Continuous
control with defined ignition position).
analogue
t [s]
t [s]
Valve position
Closed
Ignition position/low-fire rate
In acc. with chart 1
Pre-purge/high-fire rate
42
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