ABB Relion REC615 - Page 109

RTD/mA input connections
The examples of 3-wire and 2-wire connections of resistance and temperature
sensors to the 2RTD/1mA board are as shown:
Resistor sensor
X130
mA
mA
RTD1
+
-
+
-
+
-
1
2
3
4
6
7
8
RTD2
5
Figure 41: Two RTD and resistance sensors connected according to the 3-wire
connection for RTD/mA card
Resistor sensor
X130
mA
mA
RTD1
+
-
+
-
+
-
1
2
3
4
6
7
8
RTD2
5
Figure 42: Two RTD and resistance sensors connected according to the 2-wire
connection for RTD/mA card
1MRS758755 C
Basic functions
REC615 & RER615
Technical Manual
109