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3.5 Process Input Connection
3.5.2 RTD Connection
Note 1 :
Note 2 :
Note 3 :
In 3-wire system, use always cables of the same diameter (min 1mm²) Always use
wires of the same gauge and type whether a 2-wire or 3-wire system.
Install a jumper between terminals 2 and 3 when using a 2-wire RTD.
If the distance is longer than 10 meters, use 3-wire system
3-wire Pt-100 connection
(with line compensation)
(Max. Line impedance is 10
)
W
2-wire Pt-100 connection
(without line compensation)
1
1
2
2
3
3
Pt-100
Note 1
Note 2
Pt-100
3.5.1 TC (Thermocouple) Connection
1
2
3
TC
Connect the wires with the polarity as shown in the
figure left.
Always use compensation wire corresponding to the thermocouple used. If
present, the shield must be connected to a proper ground.
i
Input resistance is greater than 10M
W.
i
Input resistance is greater than 10M
W.
i
