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K400 Issue No. 1 7
• Connection of a 3-wire RTD.
• Connection of a 4-wire RTD
• Connection of a 2-wire T/I transmitter
(external 24 V dc excitation)
max 30V
CAT I
Ref RTD
0V
mA IN
V IN
35mA
max
24V Out
35mA max
X MTR
max 30V
CAT I
Ref RTD
0V
mA IN
V IN
35mA
max
24V Out
35mA max
X MTR
max 30V
CAT I
Ref RTD
0V
mA IN
V IN
35mA
max
24V Out
35mA max
X MTR
T
I
+
-
24V user supply floating (SELV)
0V user supply (SELV)