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Verfügbare Sprachen
6.7.1 Servomotor with reversing potentiometer
1,
SR
4
Fig. 39 Servomotor with reversing potentiometer
Item Description
SR, limit switch cam min.
1
SL, limit switch cam max.
2
Mains voltage input
3
Potentiometer input/output
4
Earth terminal
•
Take off the cover of the servomotor.
•
With the connected controller, move the servomotor to 0 %
dosing flow (as indicated at the measuring tube). The gear
rack at the rate valve must jut out for at least 1 mm.
+0,5
31
+0,5
1
mm
min.
(ST1)
Fig. 40 Setting the limit switches
In case of undershoot: The rate valve may get
Caution
damaged!
•
Set this position on the controller as the zero point. Set the
upper limit switch (SR, see fig. 39) to the equivalent
servomotor position.
•
Set the controller to 10 %.
•
Check the dosing flow indicated at the measuring tube. If it is
not 10 %:
•
Adjust the zero point again. Possibly the floater reaches the
end stop at a dosing flow of more than 0 %.
•
With the connected controller, move the servomotor to 100 %
dosing flow (as indicated at the measuring tube).
•
The gear rack at the rate valve must jut out for maximum
31 mm.
24
2
3
1,
SL
mm
max.
(ST2)
In case of exceeding: The rate valve may get
Caution
damaged!
•
Set the lower limit switch (SL, see fig. 39) to the equivalent
servomotor position.
•
Remount the cover of the servomotor.
6.7.2 Servomotor with analogue control
1,
SL
3
2
L
SET
R
SR
1,
Fig. 41 Servomotor with analogue control
Item Description
SR, limit switch cam min.
1
SL, limit switch cam max.
2
Programming buttons
3
Alarm output
4
LEDs
5
DIP switch
6
Mains connection terminals
7
Analogue signal connection terminals
8
Earth terminal
For exact adjustment, a current source 4-20 mA is
Note
necessary
•
Take off the cover of the servomotor.
•
Connect the 4-20 mA current sensor to terminals 51 and 52
and set it to 4 mA.
•
Use programming buttons R and SET to set the servomotor to
0 % dosing flow (as indicated by the measuring tube).
•
The gear rack at the rate valve must jut out for at least 1 mm.
In case of undershoot: The rate valve may get
Caution
damaged!
•
Set the lower limit switch (SR) to a value slightly below 0 %.
•
Set the current source to 5.6 mA (this corresponds to 10 %).
This and the following step cannot be done without a current
source.
•
Check the dosing flow indicated by the measuring tube.
If this is not 10 %:
Reset the zero point. The floater may reach the end stop if the
dosing flow exceeds 0 %.
4
5
6
7
8
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