Danger! – Dangerous electrical voltage!  
•  Installation requires qualified electrician 
•  Disconnect the power supply of the device. 
•  Secure against retriggering 
•  Verify isolation from the supply 
•  Ground and short-circuit 
•  Cover or enclose any neighboring live parts. 
•  Follow the engineering instructions (IL) 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 equipoten-
tial bonding. The system installer is responsible for implementing this connection. 
•  Connecting cables and signal lines should be installed so that inductive or capacitive interfer-
ence 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. 
•  Deviations of the mains voltage from the nominal value must not exceed the tolerance limits 
given in the specifications, otherwise this may result in malfunction and hazardous states. 
•  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 result in 
an automatic restart. 
•  Built-in devices for enclosures or cabinets must only be run and operated in an installed state; 
desktop devices and portable devices only when the housing is closed. 
•  Measures should be taken to ensure the proper  restarting of programs interrupted after a 
voltage dip or outage. This should not result in dangerous operating states even for a short 
time. If necessary, emergency stop devices should be implemented. 
•  Wherever faults in the automation system may cause damage to persons or property, external 
measures must be implemented to ensure a safe operating state in the event of a fault or 
malfunction (for example, by means of separate limit switches, mechanical interlocks, etc.).