Siemens SIMATIC S7-300 Reference Manual page 270

Programmable logic controllers module data

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Analog Modules

Connecting thermocouples with temperature compensation to the

SM 331; AI 8 x TC

All 8 inputs are available as measurement channels when the thermocouples are

connected via reference junctions that are controlled at 0 °C or 50 °C.

Reference junction

controlled at

Connecting thermocouples via a reference junction to the

SM 331; AI 8 x TC

Programmable Logic Controllers S7-300 Module Data

A5E00105505-03

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