2-Point Operation With Characteristic Curve; Switchover I - Honeywell KromSchroder IC 40 Technical Information

Function
high
analogue
chart 1
analogue
chart 2
low
closed
Operating mode 25

3 .6 .5 2-point operation with characteristic curve

switchover I

Operating mode 25
In idle state (DI 1 and DI 2 with no signal), the actua-
tor is in "low" position ("low" position may also be 0° =
"closed" position).
DI 1 functions as a pulse input. The analogue char-
acteristic curve (analogue chart 1/analogue chart 2)
is switched over via DI 2 and the adjustment angle for
the "open" position is preset by this. This angle is ap-
proached with signal at DI 1.
DI 2 with no signal:
The actuator operates in analogue chart 1/low (ana-
logue chart 1/closed) intermittent mode via digital in-
put DI 1.
IC 40 · Edition 07.18
t
1
DI 1
DI 2
t
2
Signal at DI 2:
The actuator operates in analogue chart 2/low (ana-
logue chart 2/closed) intermittent mode via digital
input DI 1.
This function allows the actuator to switch over its in-
termittent mode in ongoing operation. The adjustment
angle for the "open" position is preset via two charac-
teristic curves (charts), each with 5 interpolation points,
see page 48 (Inputs). This allows the same current
signal to be used for running through two different ca-
pacity ranges, for example for lambda adjustment or for
hot-air compensation.
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t [s]
t [s]
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