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Connecting and wiring the hardware
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6 Connecting and wiring the hardware
6.1 Power supply
6.1.1 Sizing of the power supply
WARNING: Loss of electrical safety when using unsuitable power supplies
The controller is designed exclusively for operation with protective extra-low voltage
(PELV) in accordance with EN 60204-1. Only protective extra-low voltages in accor -
dance with the listed standard may be used for the supply.
The following applies for a PROFINET network and the I/O devices used in it:
• Only use power supplies that meet EN 61204-1 and feature safe isolation and
PELV in accordance with EN 61010 - 2 - 201. They prevent short circuits between
the primary and secondary side.
• To ensure the correct operation of the controller, only use power supplies without
a fall-back characteristic curve (see Figure 6 - 2 ).
Please note:
When the controller is switched on, an increased inrush current is temporarily trig -
gered. The controller behaves like a capacitive load when it is switched on.
Electronically controlled power supplies with a fall-back characteristic curve (see
Figure 6 - 1 ) are not suitable for operation with capacitive loads.
To ensure the correct operation of the controller, you must use an external fuse.
• Use an external fuse (5 A, slow-blow).
• Make sure the power supplies and the external fuse are compatible. The power
supplies must be able to temporarily provide the tripping current.
Figure 6 - 1 Overload range with fall-back characteristic
curve
Figure 6 - 2 Overload range without fall-back charac -
teristic curve
24
U
OUT
[V]
I
OUT
[A]
1.1 x I
N
2.4 x I
N
I
N
Overload range
with fall-back
characteristic curve
24
U
OUT
[ ]
V
I
OUT
[ ]
A
I
N
1.5 x I
N
Overload range
without fall-back
characteristic curve