Siemens SIMATIC S7-300 Manual page 297

Wiring: Thermocouple with external compensation
With internal compensation, there must be a bridge between Comp+ and M
Figure 6-19
Measuring range module settings
TC-I: Thermocouple
(internal comparison) (thermal voltage
measurement)
TC-E: Thermocouples
(external comparison)
(thermal voltage measurement)
TC-IL: Thermocouples (linear, internal
comparison)
(temperature measurement)
TC-EL: Thermocouples
(linear, external comparison)
(temperature measurement)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
6.8 Analog input module SM 331; AI 2 x 12 bit; (6ES7331-7KB02-0AB0)
Wiring and block diagrams
Measuring range
Type N [NiCrSi-NiSi]
Type E [NiCr-CuNi]
Type J [Fe-CuNi]
Type K [NiCr-Ni]
Type L [Fe-CuNi]
Type N [NiCrSi-NiSi]
Type E [NiCr-CuNi]
Type J [Fe-CuNi]
Type K [NiCr-Ni]
Type L [Fe-CuNi]
Type N [NiCrSi-NiSi]
Type E [NiCr-CuNi]
Type J [Fe-CuNi]
Type K [NiCr-Ni]
Type L [Fe-CuNi]
Analog modules
ANA
Measuring range module setting
A
A
A
6-63