
Analog modules
5.13 Connecting thermocouples
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
235
Connecting to the reference junction (Order No. M72166-xxx00)
1
2
3
M+
M-
M+
M-
+
-
-
+
-
+
M
+
: Measuring line (positive)
M
-
: Measuring line (negative)
(1) Auxiliary power
(2) Compensating leads (same material as thermocouple)
(3) Output (Cu wires)
Figure 5-17 Connection of a thermocouple with reference junction (Order No. M72166-xxx00) to an
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