HEIDENHAIN iTNC 530 Service Manual page 177

Pin layout on the PL 405 B:
Terminal
X9
X10
X13
X14
X23: The PL 410 B input/output unit is also available with additional analog inputs and inputs for
Power supply for the Pt 100 thermistors. The power supply must comply with EN 50 178, 5.88 requirements
the analog inputs for "low voltage electrical separation."
on the PL 410 B
Terminal
1
2
Service diagnosis When checking the power supply, proceed as follows:
 Check the green LED on the PL in the area of connection X1/X2.
Is LED lit up?
 If LED is not lit up, check connections at X9/X10:
Is + 24 V available at X10?
Are the contacts Ok?

If the LED is lit, check the other supply terminals.
July 2002
Assignment PL 1
0 V
+24 Vdc logic power supply and for control-is-ready signal
+24 Vdc O48 –
Power supply O55
for outputs
+24 Vdc O56 –
Power supply O62
for outputs
Assignment
+24 Vdc as per EN 50 178, 5.88
+0 V
Note
If LED is not lit up, despite available power supply, the PL board is probably defective.
PL 2 PL 3 PL 4
O80 – O144 – O176 –
O87 O151 O183
O88 – O152 – O184 –
O94 O158 O190
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