Siemens Simatic S7 Series

Technical specifications
A.5 Thermocouple and RTD expansion modules (EMs)
S7-200 SMART
634 System Manual, 09/2015, A5E03822230-AC
Temperature coef-
ficient
RTD type
Under range
minimum
1
Nominal
range low limit
Nominal
range high
limit
Over range
maximum
2
Normal
range accu-
racy
@ 25°C
Normal
range accu-
racy -20°C
to 60°C
Pt 100
Pt 500
Ni 0.006720
Ni 0.006180
Ni 100
-105.0°C -60.0°C 250.0°C 295.0°C ±0.5°C ±1.0°C
Ni 120
Ni 200
Ni 500
Ni 1000
LG-Ni 0.005000
LG-Ni 1000
-105.0°C
-60.0°C
250.0°C
295.0°C
±0.5°C
±1.0°C
Ni 0.006170
Ni 100
-105.0°C
-60.0°C
180.0°C
212.4°C
±0.5°C
±1.0°C
Cu 0.004270
Cu 10
-240.0°C
-200.0°C
260.0°C
312.0°C
±1.0°C
±2.0°C
Cu 0.004260
Cu 10
-60.0°C
-50.0°C
200.0°C
240.0°C
±1.0°C
±2.0°C
Cu 50
-60.0°C -50.0°C 200.0°C 240.0°C ±0.6°C ±1.2°C
Cu 100
Cu 0.004280
Cu 10
-240.0°C
-200.0°C
200.0°C
240.0°C
±1.0°C
±2.0°C
Cu 50
-240.0°C -200.0°C 200.0°C 240.0°C ±0.7°C ±1.4°C
Cu 100
1
RTD values below the under-range minimum value report -32768.
2
RTD values above the over-range maximum value report +32767.
Table A- 120 Resistance
Range
Under range
minimum
Nominal range
low limit
Nominal range
high limit
Over range
maximum
1
Normal range
accuracy
@ 25°C
Normal range
accuracy
-20°C to 60°C
150 Ω
n/a
0 (0 Ω)
27648 (150 Ω)
176.383 Ω
±0.05%
±0.1%
300 Ω
n/a
0 (0 Ω)
27648 (300 Ω)
352.767 Ω
±0.05%
±0.1%
600 Ω
n/a
0 (0 Ω)
27648 (600 Ω)
705.534 Ω
±0.05%
±0.1%
1
Resistance values above the over-range minimum value are reported as +32767.
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 conn
ections 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.