6
GP09
Datum 12.04.2005
Art.Nr. 82343
Änd. Stand 123/05
follower electronics
follower electronics
Check all lines and connections before switching
on the equipment.
Interference and distortion
All connections are protected against the effects
of interference.
The location should be selected
to ensure that no capacitive or inductive in-
terferences can affect the display or the con-
nection lines!
Suitable wiring layout and choice
of cable can minimise the effects of interference
(eg. interference caused by SMPS, motors, cyclic
controls and contactors).
Necessary measures:
Only screened cable should be used. Screen should
be connected to earth at both ends.
Wiring to screen and to ground (0V) must be via
a good earth point having a large surface area
for minimum impedance.
The unit should be positioned well away from
cables with interference; if necessary
a protective
screen or metal housing must be provided.
The
running of wiring parallel to the mains supply
should be avoided.
Contactor coils must be linked with spark sup-
pression.
Supply voltage
Operating voltage depends on execution and is
indicated in the delivery documentation or on the
identification plate.
24 VDC ±20%
5.1 Potentiometer without instrument trans-
former
Color
Designation
brown
Po
Start point
green
S
Moving contact
white
Pe
End point
5.2 Potentiometer with R/I transformer (MWI)
The instrument transformer provides a loop current
of 4 to 20mA.
Color
Designation
brown
I+
4 to 20mA
white
I-
4 to 20mA
•
•
•
•
•
Connection instrument transformer (MWI) load
against mass:
Connection instrument transformer (MWI) load
aUB:
5.3 Potentiometer with R/U transformer (MWU)
The instrument transformer provides an output
voltage of 0 to 10VDC.
Color
Designation
brown
+24VDC
white
GND
green
Uout
6. Adjustment and Alignment
6.1 Potentiometer setting
When correctly connected and switched on, the
unit displays the current actual value. The measu-
ring range of the potentiometer is matched to the
total pull-out length of the wire. Ex works value 0
Ohm is preset for pull-out length 0mm (wire com-
pletely pulled in).
6.2 Alignment of the R/I transformer (MWI)
If the device is equipped with a resistance-current
converter, then the potentiometer resistance is
converted into a current of 4 to 20mA. The measu-
ring current is also used for feeding the instru-
ment transformer.
Ex works, the instrument transformer is aligned to
default values: 4mA for the start position (Po) and
20mA for the end position (Pe) of the potentio-
meter.
Via two trimmpotentiometer's Po and Pe
(see fig. 2) these values can be adjusted to the
application's actual start and end position.
Setting the instrument transformer
When the screws are removed the trimming poten-
tiometers can be accessed.
