Operational Overview
Doc.#6000-0015 Rev: A
Page 26
RTD
SIO
Pin 4
EXC
Pin 3
-Sense
Pin 2
+Sense
Pin 1
Ground
Figure 20. 4-wire RTD Sensor Connections
3-Wire RTD configuration:
3-Wire RTD sensor connections, illustrated in Figure 21, are:
a. Pin 1 (Ground) to the RTD.
b. Pin 2 (+ Sense) to the RTD.
c. Pin 3 (- Sense ) to the RTD and SIO pin 1 at the RTD.
d. Pin 4 (Excitation) to the RTD and SIO pin 2 at the RTD.
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IMPORTANT
The RTD must not be connected to any local ground.
RTD
SIO
Pin 4
EXC
Pin 3
-Sense
Pin 2
+Sense
Pin 1
Ground
Figure 21. 3-wire RTD Sensor Connections
2-Wire RTD configuration:
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