→
Operate actuator electrically (via the push buttons OPEN and CLOSE of the local
controls) once to the end position OPEN and once to the end position CLOSED.
If no reference operation is performed after changing the limit switching, the feedback
signal via the bus is not correct.The bus signals the missing reference operation as
a warning.
9.10 Potentiometer setting
— Option —
The potentiometer as travel sensor records the valve position.
Information This setting is only required if the potentiometer is directly wired to the customer
connection XK (refer to wiring diagram).
Information Due to the ratio of the reduction gearing the complete resistance range/stroke is not
always passed.Therefore, external adjustment (setting potentiometer) must be pro-
vided.
Figure 53: View of control unit
[1] Potentiometer
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).
9.11 Electronic position transmitter RWG: set
— 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.
Table 8: Technical data RWG 4020
3- or 4-wire systemWiring
TP_ _4/ _ _ _KMSTerminal plan
0 – 20 mA, 4 – 20 mAI
A
Output current
24 V DC, ±15 % smoothedU
V
Power supply
24 mA at 20 mA output currentIMax. current consump-
tion
600 Ω
R
B
Max. load
51
SA 07.1 – SA 16.1/SAR 07.1 – SAR 16.1 Control unit: electromechanic
AC 01.1 Intrusive Modbus RTU Commissioning (basic settings)
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