2. Safety instructions for electric drives and controllers
20 Festo.P.BE-CMMS-ST-G2-HW-EN 1008NH
Warning
• Before commissioning, also for brief measuring and test
purposes, always connect the protective conductor to all
electric devices or connect to an earth cable in accordance with
the connection diagram.
Otherwise, high voltages may occur on the housing. These could
cause an electric shock.
Warning
Do not touch the electrical connection points of the components
when the device is switched on.
Warning
• Before touching electric components with voltages over 60 V,
disconnect the device from the mains or voltage source.
• Protect the device against being switched on again.
Warning
• During installation, note the amount of intermediate circuit
voltage, especially with regard to insulation and protective
measures.
Make sure that the earthing, the cross section size of the conductor
and the corresponding short-circuit protection are correct.
2.4.4 Protection by low voltage (PELV) against electric shock
All connections and terminals with voltages from 5 to 60 volts on the stepping motor
controller are PELVs which are designed to be safe to touch in accordance with the
following standards:
Standards - International: IEC 60364-4-41
- European countries in the EU: EN 50178/1998, section 5.2.8.1.
Warning
DANGER!
High electric voltage due to incorrect connection!
Danger of bodily injury or death due to electric shock
Devices, electrical components and cables may only be connected to connections and
terminals from 0 to 60 V, providing they have protective low voltage (PELV = Protective
Extra Low Voltage).
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