Limit Switch Checking; Ewg 01.1 Electronic Position Transmitter - AUMA SAEx 07.2 Operation Manual

Commissioning
9.5.2.

Limit switch checking

9.6.

EWG 01.1 electronic position transmitter

Technical data
Setting components
34
1. Move actuator manually into both end positions of the valve.
The limit switches are set correctly if:
- LSC switch trips in end position CLOSED
- LSO switch trips in end position OPEN
- the switches release the contacts after turning back the handwheel
2. If the end position setting is incorrect: Reset limit switches.
3. If the end position setting is correct and no options (e.g. potentiometer, position
transmitter) are available: Close switch compartment.
Option
EWG 01.1 electronic position transmitter signals the remote position or the valve position.
On the basis of the actual valve position sensed by hall sensor, a current signal between
0 20 mA or 4 20 mA is generated.
Table 7: EWG 01.1
Data
Output current I
a
1)
Power supply U
V
Max. current consumption
Max. load R
B
Impact of power supply
Load influence
Temperature impact
2)
Ambient temperature
1) Power supply possible via: AC, AM controls or external power supply
2) Depending on temperature range of the actuator: Refer to name tag
The EWG is housed in the actuator switch compartment. The switch compartment must
be opened to perform any settings. Refer to <Switch compartment: open>.
All settings are made via the two push buttons [S1] and [S2].
Figure 25: View on control unit when switch compartment is open
[S1] Push button: Set 0/4 mA
[S2] Push button: Set 20 mA
LED Optical aid for setting
[1] Measuring point (+) 0/4
[2] Measuring point ( ) 0/4
SAEx 07.2 SAEx 16.2 / SAREx 07.2
3-wire and 4-wire systems
0 20 mA, 4 20 mA
24 V DC (18 32 V)
LED off = 26 mA, LED on = 27 mA
600 Ω
< 0.1 ‰/K
76 °F to 176 °F ( 60 °C to +80 °C)
20 mA
20 mA
SAREx 16.2
2-wire system
4 20 mA
24 V DC (18 32 V)
20 mA
(U 12 V)/20 mA
V
0.1 %
0.1 %