User Limitations / Application Examples - Siemens LME71 Series Basic Documentation

User limitations / application examples

Application
Controller with
3 position control
LME73
7105z19e/0912
Controller with
analog control
LME73
4...20 mA
DC 0...10 V
0...135 Ohm
Fuel valve
LME71
LME73
7105z21e/0912
Controller

Smart Infrastructure
Actuator control
via LME73
Actuator control
via LME73
Feedback potentiometer
Release
Actuator
control
analog
4...20 mA
DC 0...10 V
0...135 Ohm
Note!
If the value set for parameter 123 is too small, the actuator oscillates about the
setpoint, leading to more running cycles, increased switching frequency and more wear
and tear.
Basic Documentation LME7...
11 Multistage or modulating mode with actuator
Typical resolution
- pulse lengths min. 150 ms
- approx. 0.5°
- with 30 s running time
0...90° with 50 Hz
See table Typical
actuator values and
settings.
- approx. 2...3°
- with 30 s running time
0...90° with 50 Hz
Resolution depending on
controller.
- 0.5...2° / 0.5...3°
- with 30 s running time
0...90° with 50 Hz
Typical modulation range
1 : 30 / 1 : 50
For boiler and
process heat
1 : 10 / 1 : 15
For boiler and
process heat with
lower resolution
1 : 10 / 1 : 50
depending on controller
For boiler and
process heat
CC1P7105en
24.07.2020
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