Siemens Metro 21 M216KA Operator's Manual page 213

Connecting
Thermocouples
1L+
1M
+24V
M
Figure 11-2 Connecting Insulated Thermocouples Without Compensation, With Internal Compensation, or Use of the
Reference Temperature (Example TB 16SC)
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
Connect the thermocouple to the inputs of the modules either directly or via
equalizing conductors. Each channel, independently of the other channel, can
use any thermocouple type supported by the analog input module.
Slot A
AI TC
2L+ A1 A2
M+ M+
2M A3 A4
M– M–
SC Analog Electronic Modules – Parameters
Slot B Slot C
B1 B2 C1
B3 B4 C3
C2
C4
11-11