ABB RELION 620 Series Technical Manual page 127

1MRS757644 F
620 series
Technical Manual
Sensor
Transducer
GUID-FC23D8FC-E9BF-4B62-B8AA-52B4EDE2FF12 V2 EN
Figure 39: mA wiring connection for 6RTD/2mA card
2RTD/1mA card
This type of card accepts one milliampere input, two inputs from RTD sensors and
five inputs from VTs. The Input 1 is assigned for current measurements, inputs 2 and
3 are for RTD sensors and inputs 4 to 8 are used for measuring input data from VT.
2RTD/1mA/3SO card has one milliampere input, two inputs from RTD sensors and
three signal outputs. The Input 1 is assigned for current measurements, inputs 2 and 3
are for RTD sensors and outputs 4,5,6 are used signal outputs.
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
GUID-9233377B-F015-46E7-A0D9-2B580F436B2E V2 EN
Figure 40: Two RTD and resistance sensors connected according to the 3-wire
connection for RTD/mA card
Section 3
Basic functions
X110
+
5
Shunt
(44 Ω)
-
6
...
...
...
15
16
...
...
...
X130
+
mA
1
mA
-
2
+
3
RTD1
-
4
5
+
6
RTD2
-
7
8
121