IC 40 · Edition 07.18
21
middle
t [s]
high
low
closed
DI 1
DI 2
t [s]
t
1
t
2
t
3
t
4
t
5
t
6
Function
3 .5 .6 3-stage operation with one or two digital inputs
Operating mode 6
Each of the 4 circuit combinations resulting from DI 1
and DI 2 determines precisely one actuator position:
DI 1
DI 2
Position
Off
Off
closed
On
Off
low
Off
On
middle
On
On
high
Each signal change results in a new position setpoint
for the actuator. If the signals overlap (see t
2
), the actu-
ator moves towards “high”. If the signals do not overlap
(see t
5
), the actuator moves towards “closed”.
Various modes of operation can be implemented with
this operating mode.
Control via one digital input
DI 2 with no signal:
The actuator operates in low/closed intermittent mode
via digital input DI 1.
DI 1 with no signal:
The actuator operates in middle/low intermittent mode
via digital input DI 2.
Operating mode 6
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