Siemens SIMATIC ET 200C Manual page 93

Thermocouple:
The illustration on this page shows how thermocouples are connected for
Non-Floating non-floating measurement and external non-floating compensation:
Measurement and
Non-Floating
External
Compensation
Figure 4-14
ET 200C Distributed I/O Station
EWA 4NEB 812 6119-02b
Mechanical and Electrical Installation
Compensation
.
. .
.
.
Thermal
Coupling
Shield
Connection to ET 200C; AI 4/8
Non-Floating Measurement and External Non-Floating Compensation
1 2
+
COMP
-
OFF
+
CH0
-
+
CH1
-
+
CH2
-
+
CH3
-
+
CH4
-
+
CH5
-
+
CH6
-
+
CH7
-
M
ANA
12 Bit of Thermocouples for
4-25