Siemens RWF 50.2 - 12 Technical Data; Inputs; Resistance Thermometers; Input Signals

12 Technical data
12.1 Inputs
12.1.1 Resistance thermometers
Type Measuring
range
Measuring
accuracy
a
Impact of
ambient
temperature
Pt100; DIN EN 60751 -200...850 °C
(-328...1562 °F)
0.1% 50 ppm/K
Pt1000; DIN EN 60751 -200...850 °C
(-328...1562 °F)
0.1% 50 ppm/K
LG-Ni1000 -50...+160 °C
(-58...320 °F)
0.1% 50 ppm/K
0...135  0.25% 50 ppm/K
a
Accuracies relate to the maximum measuring range.
Line resistance Max. 30  per line with 3-wire circuit
Line balancing Not required with 3-wire circuits.
With 2-wire circuits, line balancing can be
performed by making an actual value
correction
12.1.2 Input signals
Measuring range Measuring
accuracy
a
Impact of ambient
temperature
Voltage DC 0...10 V 0.1% 100 ppm/K
Input resistance RE >2 M
Voltage DC 0(1)...5 V 0.2% 200 ppm/K
Input resistance RE >2 M
Current 0(4)...20 mA 0.1% 100 ppm/K
Voltage drop 2 V
a
Accuracies relate to the maximum measuring range.
12.1.3 Binary input D1
Potentialfree contact for the following functions, depending on the configuration:
‐ No function
‐ Setpoint readjustment
‐ Setpoint changeover
‐ Operating mode changeover
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