Siemens LMV50 series

118/327
Building Technologies Basic Documentation LMV5... CC1P7550en
7 Boiler controller / load controller 22.05.2018
3-wire circuit (copper wires); line balancing is not required when the resistances of the
measuring leads are identical.
The temperature limiter function is active.
The end of the measuring range of 150 °C, 400 °C or 850 °C depends on the
parameterization. With parameter var.Range.PtNi, the variable end of the measuring
range at 850 °C can be set to 100 °C. This way, wrong adjustments of the setpoint are
prevented since the setpoint’s setting range will automatically be limited to the end of
the measuring range.
Β
Note!
Set the end of the measuring range to 850 °C and reduce the variable end to 100 °C.
Scaling is not affected by this change since the Pt curves are fixed.
Start of measuring range: 0 ↓C or equivalent to 32 ↓F
End of measuring range: 150 ↓C or equivalent to 302 ↓F
(depending on the setting) 400 ↓C or equivalent to 752 ↓F
850 °C (1562 °F)
Parameter:
Measuring range PtNi
Open-circuit detection Short-circuit detection
150 °C Approx. 165 °C -15 °C
400 °C Approx. 440 °C -40 °C
850 °C Approx. 1000 °C -85 °C
Reducing the variable measuring range (parameter var. RangePtNi) does not change
the short-circuit detection or open-circuit detection.
Parameter MeasureRangePtNi (150°C/302°F / 400°C/752°F / 850°C/1562F)
var.RangePtNi
This input can be parameterized as a pressure or temperature input.
The temperature limiter function is not active.
Active power supply by the LMV5; typically, a pressure or temperature sensor /
transmitter is connected here (e.g. QBE2003-P).
Power supply to the pressure sensor: DC 20 V / 25 mA (rated).
Parameter MeasureRangePtNi (150°C/302°F / 400°C/752°F /
850°C/1562F)
Ext Inp X61 U/I: (4...20 mA / 2...10 V / 0...10 V / 0…20 mA)
Start of measuring range: 0 ↓C or equivalent to 32 ↓F
End of measuring range: Continuously up to 2,000 ↓C or equivalent to 3,632 ↓F
Parameter MRange TempSens
Input 1, TEMP,
Pt100 sensor (DIN)
X60
Input 2: TEMP. / PRESS
INPUT, DC 0...10 V / DC
2...10 V / 4...20 mA /
0…20 mA
X61
Measuring range
temperature
(can be parameterized)