Siemens SIMATIC Manual page 358

Analog modules
6.7 Analog input module SM 331; AI 8 x 12 bit;(6ES7331-7KF02-0AB0)
Measuring range module settings
(internal comparison) (thermal voltage meas-
(external comparison) (thermovoltage meas-
Note
• An interconnection of M- and M
this case, you must ensure that low-resistance equipotential bonding is in place so that
the permitted common-mode voltage is not exceeded.
• Interconnect M- and M
358
Measuring range
Thermocouple TC-I
urement)
Linearization is ignored
Thermocouple TC-E
urement)
Linearization is ignored
Thermocouple
(linear, internal comparison)
(temperature measurement) TC-IL
Thermocouple
(linear, external comparison)
(temperature measurement) TC-EL
ANA
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]
is prohibited when using grounded thermocouples. In
ANA
when using non-grounded thermocouples
Measuring range module
setting
A
A
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ