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Before commencing the installation
• Disconnect the power supply of the device.
• Ensure that devices cannot be accidentally 
restarted.
• Verify isolation from the supply.
• Earth and short circuit.
• Cover or enclose neighbouring units that 
are live.
• Follow the operating and installation 
instructions of the device concerned.
• Only suitably qualified personnel in 
accordance with EN 50110-1/-2 
(VDE 0105 Part 100) may work on this 
device/system.
• Before installation and before touching 
the device ensure that you are free of 
electrostatic charge.
• The functional earth (FE) must be 
connected to the protective earth (PE) or 
to the potential equalisation. The system 
installer is responsible for implementing 
this connection.
• Connecting cables and signal lines should 
be installed in such a way that inductive or 
capacitive interference does not impair the 
automation functions.
• Install automation devices and related 
operating elements in such a way that they 
are well protected against unintentional 
operation.
• Suitable safety hardware and software 
measures should be implemented for the 
I/O interface so that a line or wire breakage 
on the signal side does not result in 
undefined states in the automation 
devices.
• Ensure a reliable electrical isolation of the 
low voltage for the 24 volt supply. Only 
use power supply units complying with 
IEC 60364-4-41 (VDE 0100 Part 410) or 
HD 384.4.41 S2.
• Deviations of the mains voltage from the 
rated value must not exceed the tolerance 
limits given in the specifications, otherwise 
this may cause malfunction and dangerous 
operation.
•Emergency stop devices complying with 
IEC/EN 60204-1 must be effective in all 
operating modes of the automation 
devices. Unlatching the emergency-stop 
devices must not cause restart.
• Devices that are designed for mounting in 
housings or control cabinets must only be 
operated and controlled after they have 
been installed with the housing closed. 
Desktop or portable units must only be 
operated and controlled in enclosed 
housings.
Safety instructions
Warning!
Dangerous electrical voltage!
SI1_G.FM  Seite I  Mittwoch, 7. März 2007  9:49 09