HEIDENHAIN iTNC 530 Service Manual page 472

Terminal, 4-pin
X44:
PLC supply voltage
Pin layout on the MC 42x (B/C):
Connectiont
erminal
1
2
3
4
27 – 472
Pin layout
+24 V cannot be switched off via
EMERGENCY STOP
+24 V can be switched off via
EMERGENCY STOP
0 V
Note
If the +24-V power supply (which cannot be shut off via emergency stop) is missing at X44,
the error message Supply voltage missing at X44 appears.
PLC outputs
O24 to O30
O16 to O23
O0 to O15
HEIDENHAIN Service Manual iTNC 530