HEIDENHAIN iTNC 530 Service Manual page 519

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