Siemens Simatic S7 Series System Manual page 634

Technical specifications
A.5 Thermocouple and RTD expansion modules (EMs)
Temperature coef- RTD type
ficient
Pt 100
Pt 500
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- 120 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.
634
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)
Nominal Over range
range high maximum
2
limit
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 range Normal range
maximum accuracy
1
@ 25°C
176.383 Ω ±0.05%
352.767 Ω ±0.05%
705.534 Ω ±0.05%
System Manual, 09/2015, A5E03822230-AC
Normal Normal
range accu- range accu-
racy racy -20°C
@ 25°C to 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%
S7-200 SMART