Kübler A40 Instructions D'utilisation page 9

4.2 Potentiometer wit R/I-transformer (4...20 mA)
Power supply 24 VDC ±20%
Pin Color Designation
1 brown +I
4 ... 20 mA
2 white -I
4 ... 20 mA
3 - - - - - -
4 - - - - - -
Fig. 5: Connection load against mass (4...20 mA)
Fig. 6: Connection load against +V (4...20 mA)
4.3 Potentiometer with R/U-transformer (0...10 V)
Power supply 24 VDC ±20%
Pin Color Designation
1 brown +V
2 white 0V
3 green Uout
4 - - - - - -
4.4 In case of a version with an encoder, the data can
be found in the data sheet available at the address
www.kuebler.com.
5. Adjusment and alignement
5.1 Potentiometer setting
When correctly connected and switched on, the
unit displays the current actual value.
The measuring range of the potentiometer is mat-
ched to the total pull-out length of the wire. Ex
works value 0 Ohm is preset for pull-out length
0 mm (wire completely pulled in).
 
 
viewing side =
plug-in-side
follower electronics
+
V
-

0V
follower electronics
V
I 
I
0V
 
 
viewing side =
plug-in-side
5.2 Alignment of the R/I-transformer (4...20 mA)
If the device is equipped with a resistance-current
converter, then the potentiometer resistance is
converted into a current of 4 to 20 mA.
The measuring current is also used for feeding the
instrument transformer.
The instrument transformer is preset to stan-
dard values 4 mA for potentiometer's start positi-
on (Po) and 20 mA for end position (Pe). Via two
trimmpotentiometer's Po and Pe (see fig. 9) these
values can be adjusted to the application's actual
start and end position.
Setting the instrument transformer
When the screws (1) are removed and the cover
(2) opended, the trimming potentiometers can be
accessed.
Measuring range ≤ 1000 mm
Fig. 7: Adjustment of the trimmpotis 4...20 mA
Measuring range > 1000 mm


Fig. 8: Opening
 
3