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Temperature
RTD type
coefficient
Ni 0.006720
Ni 100
Ni 0.006180
Ni 120
Ni 200
Ni 500
Ni 1000
LG-Ni 0.005000
LG-Ni 1000
Ni 0.006170
Ni 100
Cu 0.004270
Cu 10
Cu 0.004260
Cu 10
Cu 50
Cu 100
Cu 0.004280
Cu 10
Cu 50
Cu 100
RTD values below the under-range minimum value report -32768.
1
RTD values above the over-range maximum value report +32767.
2
Table A- 179 Resistance
Range
Under range
minimum
150 Ω
n/a
300 Ω
n/a
600 Ω
n/a
Resistance values above the over-range minimum value are reported as +32767.
1
Note
The module reports 32767 on any activated channel with no sensor connected. If open wire
detection is also enabled, the module flashes the appropriate red LEDs.
When 500 Ω and 1000 Ω RTD ranges are used with other lower value resistors, the error
may increase to two times the specified error.
Best accuracy will be achieved for the 10 Ω RTD ranges if 4 wire connections are used.
The resistance of the connection wires in 2 wire mode will cause an error in the sensor
reading and therefore accuracy is not guaranteed.
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
Under range
Nominal
minimum
range low limit
1
-105.0 °C
-60.0 °C
-105.0 °C
-60.0 °C
-105.0 °C
-60.0 °C
-240.0 °C
-200.0 °C
-60.0 °C
-50.0 °C
-60.0 °C
-50.0 °C
-240.0 °C
-200.0 °C
-240.0 °C
-200.0 °C
Nominal range
Nominal range
low limit
high limit
0 (0 Ω)
27648 (150 Ω)
0 (0 Ω)
27648 (300 Ω)
0 (0 Ω)
27648 (600 Ω)
A.9 Thermocouple and RTD signal modules (SMs)
Nominal
Over
range high
range
limit
maximum
2
250.0 °C
295.0 °C
250.0 °C
295.0 °C
180.0 °C
212.4 °C
260.0 °C
312.0 °C
200.0 °C
240.0 °C
200.0 °C
240.0 °C
200.0 °C
240.0 °C
200.0 °C
240.0 °C
Over
Normal range
range
accuracy
maximum
@ 25 °C
1
176.383 Ω ±0.05%
352.767 Ω ±0.05%
705.534 Ω ±0.05%
Technical specifications
Normal
Normal range
range
accuracy
accuracy
-20 °C to
@ 25 °C
60 °C
±0.5 °C
±1.0 °C
±0.5 °C
±1.0 °C
±0.5 °C
±1.0 °C
±1.0 °C
±2.0 °C
±1.0 °C
±2.0 °C
±0.6 °C
±1.2 °C
±1.0 °C
±2.0 °C
±0.7 °C
±1.4 °C
Normal range
accuracy
-20 °C to 60 °C
±0.1%
±0.1%
±0.1%
929
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