Siemens LMV50 Series Manual page 118

Input 1, TEMP,
Pt100 sensor (DIN)
X60
Β
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)
118/327
Building Technologies
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.
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:
End of measuring range:
(depending on the setting)
Parameter:
Measuring range PtNi
150 °C
400 °C
850 °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 function is not active.
temperature limiter
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:
End of measuring range:
Parameter MRange TempSens
Basic Documentation LMV5...
7 Boiler controller / load controller
0 ↓C or equivalent to 32 ↓F
150 ↓C or equivalent to 302 ↓F
400 ↓C or equivalent to 752 ↓F
850 °C (1562 °F)
Open-circuit detection
Approx. 165 °C
Approx. 440 °C
Approx. 1000 °C
0 ↓C or equivalent to 32 ↓F
Continuously up to 2,000 ↓C or equivalent to 3,632 ↓F
Short-circuit detection
-15 °C
-40 °C
-85 °C
CC1P7550en
22.05.2018