Power Supply For Plc Outputs; Introduction - HEIDENHAIN iTNC 530 Service Manual

17.5 Power Supply for PLC Outputs

17.5.1 Introduction

The PLC of the iTNC 530 as well as the PL 4xx B / PL 510 are powered by the 24 V control
voltage of the machine (in accordance with VDE 0551).
The control voltage must be smoothed with a capacitance of 150 µF/A rated, at least however
with 1000 µF/A. At a current load of 15 A, for example, this corresponds to a capacity of 2250 µF.
EN 61 131-2:1994 permits:
If half of the outputs are switched at the same time, the following are the values for power
Power
consumption:
consumption
MC 42x (B/C):
PL 410 B:
PL 405B:
PL 510:
MC 42x (B/C):
Nominal operating
PL 410 B:
current per output
PL 405 B:
PLD 16-8:
17 – 268
5% alternating voltage component is permissible
Minimum absolute value: 20.4 Vdc
Maximum absolute value: 28.8 Vdc
Approx. 460 W
Approx. 235 W
Approx. 485 W
0.150 A
Simultaneity:
Total current:
48 W
2 A (with max. current consumption of 20 A)
2 A (with max. current consumption of 20 A)
2 A
2 outputs with 2 A each
4 outputs with 1 A each
8 outputs with 0.5 A each
Out0 to Out7: ≤ 4 A
Out0 to Out3: ≤ 2 A
Out4 to Out7: ≤ 2 A
HEIDENHAIN Service Manual iTNC 530