Siemens SIMATIC Manual page 397

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Table of Contents

Wiring: Thermocouple via reference junction

All 8 inputs are available as measurement channels if thermocouples are wired via reference

junctions which are regulated to 0 °C or 50 °C.

Thermocouple via reference junction

Reference junction regulated to 0 °C or 50 °C

for example, compensation box (per channel) or thermostat

Analog-to-Digital Converter (ADC)

Backplane bus interface

External cold spot comparison

Wiring and block diagram

S7-300 Module data

Manual, 06/2017, A5E00105505-AJ

6.10 Analog input module SM 331; AI 8 x TC; (6ES7331-7PF11-0AB0)

Analog modules

S7-300S7-300 module data