December 2001 Power Supply 3 – 27
3.4.4 PLC Power Supply
The PLC of the LE 426 CB/PB/M and LE 430 CA/PA/M logic units as well as
the PL 410B/PL 405B are powered by the 24 Vdc control voltage of the
machine (in accordance with VDE 0551).
The control voltage must be smoothed with a minimum 1000 µF at a rated
current capacity of 150 µF/A. At a current load of e.g. 15 A, this corresponds
to a capacity of 2250 µF.
EN 61 131-2:1994 permits the following values:
n 5% alternating component
n Minimum absolute value 19.2 Vdc
n Maximum absolute value 30 Vdc
Power
consumption
If half of the outputs are switched at the same time, the following are the
values for power consumption:
PL 410B: approx. 460 W
PL 405B: approx. 235 W
Nominal operating
current per output
LE: 0.125 A (with a simultaneity factor of 0.5)
PL 410B: 2 A (with max. current consumption of 20 A)
PL 405B: 2 A (with max. current consumption of 20 A)
X44: PLC supply
voltage
Pin layout of the logic unit:
If you are using the TNC as a programming station, the PLC power supply
must be connected to terminals 1 and 2.
Warning
Use only original replacement fuses.
Terminal Assignment PLC outputs
1 +24 V cannot be switched off
via EMERGENCY STOP
O24 to O30 control is ready
2 +24 V can be switched off via
EMERGENCY STOP
O16 to O23
3O0 to O15
40 V
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