AG02
Datum 14.09.2011
Art. Nr. 82270
Änd. Stand 343/11
21
Fig. 11: Alignment
Output
current
Distance
20 mA
4 mA
(Po)
(Pe)
0
Fig. 12: Setting the trimming potentiometers MWU
Pe = max.
= Po
S
0
1
2
Pe
Turning direction from driving shaft after turning on
Potentiometer
• Trimmpotentiometer Pe is used to adjust a voltage
of 10 V to potentiometer values of 60 to 100 %
of the total range.
6.3.3.2 Alignment the instrument transformer
(MWU)
1. Move axis to final position
2. Turn potentiometer (Pe) until an output voltage
of (10 V) is measured.
6.4 Magnetic absolute encoder (Profibus-DP;
CANopen; serial interfaces)
After correct mounting and wiring, the actuator can
be activated by turning on the 24 V power supply.
Green lighting of the two LED's signals that no limit
switches are active (see fig. 4). Now, the standard
protocol enables customized parameterization of
the actuator via the serial RS232 or RS485 inter
-
face.
Warning
Prior to commissioning the drive, thoroughly
read the manuals. The manuals for Profibus-DP,
CANopen and serial interfaces can be found on
the attached CD.
6.3.3 Setting and alignment of the R/U transformer
(MWU)
If the device is equipped with a resistance-voltage
converter, then the potentiometer resistance is
converted into a voltage of 0 to 10 VDC. Connection
is via three-wire technology.
Attention: turning direction
Ex works, the instrument transformer is aligned
to the initial value of 0 V and a final value of 10 V
output voltage (Pe). To check the turning direction
take a measurement of the voltage value between
'GND' and 'Uout':
Voltage U = 0 V:
turning direction e
Voltage U = 10 V:
turning direction i
This measuring range corresponds to the transmis
-
sion range of the potentiometer which is given by
the customer. The output of the instrument trans
-
former should be wired against GND with a resistor
2 to 10 kΩ to enable the initial value of 0V to be set.
However, the output load should be dimensioned so
that an output current of 15 mA won't be exceeded
in the end position (10 V).
Attention: trimmpotentiometer's
By means of the trimming potentiometer (see fig.
12), the final value can be adjusted to the actual
final position of the application.
6.3.3.1 Setting the instrument transformer (MWU)
When the screws (1) are removed and the cover (2)
opened, the trimming potentiometers can be ac
-
cessed.
