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24V
DC
Parameters
IC 20 . .E
88
µC
BCU 580..F1
OUT
IN
20 19 18
17
16
15
A
D
A
D
ON
1 2 3 4 5 6
µC
R
The positions for minimum capacity, maximum capac-
ity and ignition capacity can be set using the actuator.
When the appropriate position has been reached, this
information is signalled back via terminal 52. If no sig-
nal is received that the position has been reached with-
in the timeout time of 255 s, a safety shut-down of the
BCU will be performed and a fault message (A , A or A
) will be displayed, see page 51 (Fault signalling). In
addition, the actuator will be moved to the set position
for minimum capacity using the output at terminal 54.
BCU 580 · Edition 11.15l
3,15AT
13
12 11
8
7
6
5
4
3 2 1
PE
S2
S1
R
S3
S1
Min
Max
The control system is enabled during operation via the
controller enable output (terminal 56). During the con-
troller enable procedure, the actuator can be adjusted
infinitely between the positions for maximum and mini-
mum capacity by a controller (0(4) – 20 mA, 0 – 10 V)
using the setpoint device on terminals 17 and 18 or the
bus signal. There is no timeout active in this case.
L1
If bus control is active (parameter 75), the controller en-
N
PE
able output (terminal 56) has a different function. The
wiring between the BCU and the 3-point step controller
can be adjusted so that the control range of the actua-
tor is between the positions for maximum and ignition
capacity.
S 1 0
R
S4
Manual mode
In Manual mode, the actuator can be moved between
the positions for maximum and minimum capacity in
3-point step operation. No timeout is active when ap-
proaching these positions. The controller enable output
(terminal 56) is not active and not checked.
▼
62 61
5 6
7
9
10
11 12
c
c
24V
DC
3,15AT
88
µC
BCU 580..F1
16
15
13
12 11
8
7
S2
S1
Min
Max
3PS
L1
N
PE
6
4
3 2 1
PE
S11
S10
S1
S3
S4
77
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