Siemens SCALANCE WLC711 Kompaktbetriebsanleitung Seite 24

PE terminal
1. Connect the PE terminal (M4 thread)
the device with large-area contact to the
equipotential bonding line. The minimum
cross-section of the equipotential bonding
line is 2.5 mm .
2
2. Connect the equipotential bonding line with
large-area contact to the protective ground
conductor of the cabinet or the plant in
which the device is to be installed.
5.2 Connecting the 24 V DC power supply
To be noted before you connect the device
Note the following in order to operate the device safely and according to regulation:
WARNING
The device should only be connected to a 24V DC power supply which satisfies the requirements of safe extra low voltage
(SELV).
If the device is used on a wall, in an open rack or other similar locations, an NEC Class 2 current source is required in
order to meet the UL requirements (UL 60950-1). In all other cases (IEC / EN / DIN EN 60950-1) either a current source of
limited output (LPS = Low Power Source), or a line-side fuse or a line-side circuit breaker is necessary. The power needs
to be limited to a value below 4.16 A. The fuse value required: Max. 4 A.
Use the special plug supplied to connect the supply voltage.
Note
The permitted cable cross-section for the 24 VDC connection is 0.75 mm
Connecting
Steps for connecting the device to the 24 V DC power supply
1. Switch off the 24 VDC power source
2. Connect the power supply via the connector (when
shipped, the connector is inserted in the socket)
22
①
on
to 2.5 mm .
2 2
SCALANCE WLC711
A5E03740572-05, 04/2016