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FP-RTD-124 and cFP-RTD-124 6 ni.com
negative terminals (COM and SENSE–). Connect the third wire to
the positive terminal (SENSE+). Use a short jumper wire to
connect the EXCITE+ terminal to the SENSE+ terminal.
Figure 5. Three-Wire RTD Connections on One Channel
Taking Measurements from Two-Wire RTDs
Connect one wire of a two-wire RTD to the SENSE+ terminal and
the other wire to the SENSE– terminal. Use a short jumper wire to
connect the SENSE+ terminal to the EXCITE+ terminal. Use
another short jumper wire to connect the SENSE– terminal to the
COM terminal.
Figure 6. Two-Wire RTD Connections on One Channel
SENSE+
[c]FP-RTD-124
SENSE–
COM
EXCITE+
Three-Wire
RTD
Short Jumper Wire
SENSE+
[c]FP-RTD-124
SENSE–
COM
EXCITE+
Two-Wire
RTD
Short
Jumper
Wire
Short
Jumper
Wire