11-13
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
If all thermocouples connected to the inputs of the analog modules of a ter-
minal block have the same reference junction, compensate them as follows:
Slot A
AI RTD
Slot C
Slot B
AI TC
C1
C2
C3
C4
B1
B2
B3
B4
A1
A2
A3
A4
1L+
2L+
1M
2M
+24V
M–
M–
M+
M+
M
M+
IC+
M–
IC–
only for an ungrounded
thermocouple
*
*
*
Figure 11-3 Connecting Insulated Thermocouples of the Same Type with External Compensation, via a Resistance
Thermometer Connected to the Resistance Measurement Module, to Slot A of the Terminal Block
(Example TB 16SC)
Connect the resistance thermometer to the module on slot A. Note the para-
meterization of the reference junction for each thermocouple channel.
In Figures 11-2 and 11-3, the abbreviations have the following meanings:
IC +:
Constant current line (positive)
IC–:
Constant current line (negative)
M +:
Measurement line (positive)
M–:
Measurement line (negative)
Compensation by
Measurement of
the Reference
Junction
Temperature
Abbreviations
SC Analog Electronic Modules – Parameters