1 For your safety
© Festo Didactic 759614
7
Warning
This pictogram indicates that the device must be switched off and its mains plug
must be removed from the electric outlet before installation, repair, maintenance,
and cleaning work. Observe the user documentation, in particular all safety
instructions. Non-observance may result in severe personal injury or damage to
property.
1.3 Work safely
The power supply unit is constructed to protection class I as per EN 61558-1. It is equipped with a VDE-
tested mains cable with protective earth conductor and must only be operated with or connected to
110/230 V alternating voltage networks with protective grounding.
• Risk of fatal injury from interrupted protective earth conductor
– The protective earth conductor (yellow/green) must not be interrupted either outside or inside of
the device.
– The insulation of the protective earth conductor must not be damaged or removed.
• National regulations for operating electrical systems and equipment must be observed in commercial
facilities.
• In schools and training facilities, the operation of power supply units must be responsibly monitored by
trained personnel.
• Caution!
Capacitors in the device can still be charged even if the device has been disconnected from all power
sources.
• When replacing fuses, use only prescribed fuses with the correct nominal current intensities.
• Never switch on your power supply unit immediately if it is moved from a cold room to a warm one. The
condensate that forms can, under unfavourable conditions, damage your device. Leave the device
switched off until it has reached room temperature.
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