Connecting an Isothermal Block
Figure 6. External Cold Junction Compensation
24 VDC
TC+ (0:3)
TC– (0:3)
Thermocouple
REM-11120
+
–
x4
a1
a2
b1
b2
Pt100
Isothermal Block
CJ+ (0:1)
CJ– (0:1)
Connect the external Pt 100 cold junction sensor to the isothermal block using a Pt 100 input
of connector 1 or 2.
Figure 7. Cold Junction Compensation with Temperature Specification
24 VDC
TC+ (0:3)
TC– (0:3)
Thermocouple
REM-11120
+
–
x4
a1
a2
b1
b2
Isothermal Block
Write the cold junction temperature recorded externally by the isothermal block to the first
process data output word of the module in your application.
REM-11120 Getting Started Guide
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© National Instruments
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