Festo DLP-VSE Series, Manual

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3. Installation
3-7
Festo P.BE-DLP-VSE-... en 0206a
3.2.3 Connecting the power supply
Selecting the power unit
Warning
Use only power units which guarantee reliable isolation in
accordance with IEC 742/EN 60742/VDE 0551 with at least
4kV isolation resistance (Protected Extra-Low Voltage,
PELV). Switch power packs are permitted providing they
guarantee reliable isolation in accordance with
EN 60950/VDE 0805.
Remark:
By using PELV power units, you can ensure protection against
electric shock (protection against direct and indirect contact)
in accordance with EN 60204-1/IEC 204. For supplying power
to PELV networks, you should use safety transformers with
the symbol shown here. The Local control unit must be
earthed in order to guarantee the operation of certain func-
tions (e.g. EMC).
S
When selecting a power unit, make sure that it has suffi-
cient power output.
Operating voltage cable
Please note
Please note that the length of the operating voltage cable
must not exceed 10 m.
S
Use an operating voltage cable with sufficient cross-sec-
tional area (stiff or flexible cable with cross-sectional area
1.5 mm
2
,outer diameter: 3...8 mm).