July 2010 27 – 519
X15 to X18:
Analog input on the
PLA 4-4 analog
module
Characteristics of the connecting cable:
îš„ Shielding
 2 conductors with 0.14 mm²
îš„ Maximum length: 50 m
X19 to X22:
Connection for Pt
100 on the PLA 4-4
analog module
Normally, the thermistor connection is a "four-conductor circuit":
Connecting
terminals
Pin layout
1 –10 V to +10 V
2 0 V (reference potential)
3 Shield
The interfaces comply with the requirements of EN 61800-5-1 for "protective extra-low
voltage" (PELV).
Connecting
terminals
Pin layout
1 I+ Constant current for Pt 100
2 U+ Measuring input for Pt 100
3 U– Measuring input for Pt 100
4 I– Constant current for Pt 100
5 Shield
The interfaces comply with the requirements of EN 61800-5-1 for "protective extra-low
voltage" (PELV).
1
2
4
5
Measuring input U+
Measuring input
U

I

I
Pt100 Customer's cable
4 x 0.14 mm
2
screened,
maximum 30 m
8Th3110
3
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