Jetter AG
Electrical connection | 6
JX3-THI2-RTD-EI User Manual
18 / 36
3.
Connect the shield of the cable to one of the SHLD connectors of the termi-
nal.
4.
Connect the cable shield with the greatest possible surface area to a shielding
terminal.
6.3 Connection types of temperature sensors
Depending on requirements and ambient conditions, temperature sensors can be
connected in different ways.
Two-wire mode and three-wire mode
The two-wire mode is not suitable for precision measurement because the resis-
tance of the supply line influences the measurement results. The three-wire mode
is recommended for longer cables. This solution corrects the resistance of the
supply line.
UX+
I+
UX-
3
0V
5
I-
4
BR
6
0V
8
BR
7
SHLD
9
SHLD
10
2
1
UX+
I+
UX-
3
0V
5
I-
4
BR
6
0V
8
BR
7
SHLD
9
SHLD
10
2
1
A
B
Fig. 8:
Connection examples in two-wire and in three-wire mode
A
Two-wire mode
B
Three-wire mode
Four-wire and potentiometer mode
The four-wire mode offers a very high measuring accuracy. In potentiometer
mode, the module records the total resistance and the partial resistance of the
potentiometer and outputs the position of the potentiometer as a percentage.
UX+
I+
UX-
3
0V
5
I-
4
BR
6
0V
8
BR
7
SHLD
9
SHLD
10
2
1
C
Fig. 9:
Connection examples in four-wire and potentiometer mode
C
Four-wire mode
D
Potentiometer mode