Figure 25: View on control unit
[1] Potentiometer
9.8.1. Potentiometer setting
Information Due to the ratio of the reduction gearing, the complete resistance range/stroke is not
always covered. Therefore, external adjustment (setting potentiometer) must be
provided.
1. Move valve to end position CLOSED.
2. Turn potentiometer [1] clockwise to the stop.
➥
End position CLOSED corresponds to 0 %
➥
End position OPEN corresponds to 100 %
3. Turn potentiometer [1] slightly in opposite direction.
4. Perform fine-tuning of the zero point at external setting potentiometer (for remote
indication).
9.9. Electronic position transmitter RWG
— Option —
The electronic position transmitter RWG records the valve position. On the basis of
the actual position value measured by the potentiometer (travel sensor), it generates
a current signal between 0 – 20 mA or 4 – 20 mA.
Technical data
Table 10: RWG 4020
2-wire system3-wire or 4-wire systemData
4 – 20 mA0 – 20 mA, 4 – 20 mAOutput current I
a
14 V DC + (I x R
B
), max. 30 V24 V DC (18 – 32 V)Power supply U
V
1)
20 mA24 mA at 20 mA output currentMax. current consumption
(U
V
– 14 V)/20 mA
600 Ω
Max. load R
B
0.1 %/V0.1 %/VImpact of power supply
0.1 %/100 Ω0.1 %/(0 – 600 Ω)
Load influence
< 0.3 ‰/KTemperature impact
–60 °C to +80 °CAmbient temperature
2)
5 kΩ
Transmitter potentiometer
Power supply possible via: AC, AM controls or external power supply1)
Depending on temperature range of the actuator: Refer to name plate2)
Setting elements
The RWG is housed in the actuator switch compartment. The switch compartment
must be opened to perform any settings. Refer to <Switch compartment: open>.
Setting is made via three potentiometers [1], [2] and [3].
35
SQ 05.2 – SQ 14.2/SQR 05.2 – SQR 14.2
AMB 01.1 Commissioning (basic settings)
To Next Page
Loading...
