Siemens SIMATIC S7-1200

Technical specifications
A.8 RTD and Thermocouple modules
Easy Book
324 Manual, 03/2014, A5E02486774-AF
Technical data
RTD and Thermocouple (TC)
Isolation
Field side to logic
500 VAC
Field to 24 VDC SM RTD and SM TC: 500 VAC
(Not applicable for SB RTD and SB TC)
24 VDC to logic SM RTD and SM TC: 500 VAC
(Not applicable for SB RTD and SB TC)
Channel to channel isolation
• SM RTD: None
(Not applicable for SB RTD)
• SM TC: 120 VAC
(Not applicable for SB TC)
Accuracy (25 °C / -20 to 60 °C) See the RTD/TC type tables:
• RTD (Page 326)
• TC (Page 324)
Repeatability
±0.05% FS
Maximum sensor dissipation
• RTD: 0.5 mW
• TC: Not applicable
Measuring principle
Integrating
Module update time See the RTD/TC filter selection tables:
• RTD (Page 327)
• TC (Page 325)
Cold junction error
• RTD: Not applicable
• TC: ±1.5 °C
Cable length (meters)
100 meters to sensor max.
Wire resistance
• RTD: 20 Ω, 2.7 Ω for 10 Ω RTD max.
• TC: 100 Ω max.
A.8.5
Thermocouple type
Table A- 54 Thermocouple type (ranges and accuracy)
Type
Under range
minimum
1
Nominal
range low limit
Nominal
range high
limit
Over range
maximum
2
Normal range
3,
4
accuracy
@ 25 °C
Normal range
3, 4
accuracy
-20 °C to 60 °C
J
-210.0 °C
-150.0 °C
1200.0 °C
1450.0 °C
±0.3 °C
±0.6 °C
K
-270.0 °C
-200.0 °C
1372.0 °C
1622.0 °C
±0.4 °C
±1.0 °C
T
-270.0 °C
-200.0 °C
400.0 °C
540.0 °C
±0.5 °C
±1.0 °C
E
-270.0 °C
-200.0 °C
1000.0 °C
1200.0 °C
±0.3 °C
±0.6 °C
R & S
-50.0 °C
100.0 °C
1768.0 °C
2019.0 °C
±1.0 °C
±2.5 °C
B 0.0 °C 200.0 °C 800.0 °C -- ±2.0 °C ±2.5 °C
--
800.0 °C
1820.0 °C
1820.0 °C
±1.0 °C
±2.3 °C
N
-270.0 °C
-200.0 °C
1300.0 °C
1550.0 °C
±1.0 °C
±1.6 °C