Service Manual
1-19
Important Information
Safety Information
Other symbols that indicate potential hazardous situations
Most of these symbols do not appear in this manual but may appear on the equipment.
*Electrostatically Sensitive Device
1.1.1 Safety Information: danger
Ground Safety
Ensure that all proper ground connections have been made before operating the system.
Never operate the equipment before connecting the ground wire.
Dangerous Voltages
Voltages higher than 30 VAC (alternating current) or 42 VDC (direct current) are classified as
dangerous voltages (EN 60950).
Damage
● Replace the power cord immediately if there is any sign of damage.
● Replace any damaged safety equipment immediately (covers, labels, safety cables).
● Use Siemens-approved cables and modules only. The use of accessories that are not
recommended for the system may cause it to malfunction.
Make sure power is turned off while equipment is being serviced.
When maintenance services require shutting down the system, make sure to disconnect all
power supplies.
Working on low voltage network circuits
● Only qualified technical personnel should work on low voltage network systems (100-
240 V ac).
● Never work alone when working with high voltage circuits. Make sure there is another
person present who knows the location of the circuit breakers.
● Never touch live wires that are not properly insulated.
● Ensure that no other power source is connected to the equipment. Make sure that the
power source being used is protected by means of an additional breaker or fuse.
Electricity Weight Fire Chemicals
ESD*
Heat
Laser
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