HEIDENHAIN iTNC 530 Service Manual page 515

Normally, the thermistor connection is a "four-conductor circuit":
The PL 410B input/output unit is also available with additional analog inputs and inputs for Pt 100
X23:
thermistors.
Supply voltage for
analog inputs
of the PL 410 B
Connecting terminal
1
2
July 2010
’
I
Measuring input U+
Measuring input
’
I–
Pt100 Customer's cable
4 x 0.14 mm 2
maximum 30 m
Pin layout
+24 V– (safety extra-low voltage as per EN 61800-5-1)
+0 V
DANGER
The power supply must correspond to a safety extra-low voltage (SELV) as per
EN 61800-5-1.
1
2
U–
3
4
5
screened,
8Th3110
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