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Parameters
Operating mode 11
Operating mode 11 allows cyclic operation (ON/OFF
and OFF/Low/High/OFF).
The actuator IC moves to the "High fire" position during
the controller enable procedure. There is no timeout ac-
tive in this case.
t 1
t 2
Purge
High
fire
Ignition
Closed
DI 1
DI 2
BCU
Signal at
terminal
Position
65
66
OFF
OFF
Closed
ON
OFF
Ignition
ON
ON
High-fire rate
OFF
ON
Purge
BCU 460, BCU 465 · Edition 11.19
t 3
t 4
t 5
t 6
IC 40 (operating mode 11)
Butterfly valve position
Closed
Minimum/Ignition capacity
High-fire rate
Maximum capacity
Operating mode 27
During the controller enable procedure, the actuator
IC 40 can be adjusted infinitely between the positions
for maximum and minimum capacity using its ana-
logue input (terminals 18 and 19). There is no timeout
active in this case.
t 1
Purge
0–20
mA
Ignition
Closed
t [s]
DI 1
DI 2
t [s]
BCU
Signal at
terminal
65
66
OFF
OFF
ON
OFF
ON
ON
OFF
ON
▼
t 2
t 3
t 4
IC 40 (operating mode 27)
Position
Butterfly valve position
Closed
Ignition
Minimum/Ignition capacity
Any position between minimum and
0 – 20 mA
maximum capacity
Purge
Maximum capacity
t 5
t 6
t [s]
t [s]
Closed
110
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