Rockwell-automation 1771-IR Series D RTD Input Module User Manual Manuale Utente Pagina 67

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2 and 4–Wire RTD Sensors E–3
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The illustration below shows how to connect 4–wire sensors to the
field wiring arm of the RTD Input module. A 4–wire sensor has two
pairs of leads; one pair for each resistor junction. One wire of the 4 is
not used (it does not matter which one). This leaves 3 wires – one
pair and one single wire. You must connect the single wire to the
terminal marked ”A”. You connect the remaining pair of wires to
terminals ”B” and ”C”. It doesn’t matter which wire of the pair
connects to terminal ”B” and which wire connects to terminal ”C” so
long as all 3 wires are the same AWG gauge.
Connecting a 4–Wire Sensor to the Field Wiring Arm
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Connecting 4-Wire
Sensors
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