Siemens LME73 - User Limitations; Application Examples

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Building Technologies Basic Documentation LME7... CC1P7105en
11 Multistage or modulating mode with actuator 17.04.2018
User limitations / application examples
Application Typical resolution Typical modulation range
LME73
Controller with
3 position control
Actuator control
via LME73
7105z19e/0912
- pulse lengths min. 150 ms
- approx. 0.5°
- with 30 s running time
0...90° with 50 Hz
1 : 30 / 1 : 50
For boiler and
process heat
LME73
Controller with
analog control
Actuator control
via LME73
7105z20e/0912
Feedback potentiometer
4...20 mA
DC 0...10 V
0...135 Ohm
See table Typical
actuator values and
settings.
- approx. 2...3°
- with 30 s running time
0...90° with 50 Hz
1 : 10 / 1 : 15
For boiler and
process heat with
lower resolution
LME71
LME73
Controller
Actuator
control
7105z21e/0912
analog
4...20 mA
DC 0...10 V
0...135 Ohm
Release
Fuel valve
Resolution depending on
controller.
- 0.5...2° / 0.5...3°
- with 30 s running time
0...90° with 50 Hz
1 : 10 / 1 : 50
depending on controller
For boiler and
process heat
Β
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.