Danger as a result of inactive safety functions
Inactive safety functions or ones that have not been adapted can result in machine
malfunctions. These malfunctions can result in death or severe injury.
● Before commissioning, carefully comply with the safety information and instructions
provided in Chapters "Safety notes" and "Safe Torque Off / Safe standstill (option K80)
(Page 50)".
● Carry out a safety inspection for functions relevant to safety on the entire system, including
all safety-related components.
● Ensure that the safety functions used in your drives and automation tasks are adjusted and
activated using the appropriate parameterizing.
● Carry out a function test.
● Only put your plant/system into live operation once you have ensured that the functions
relevant to safety are operating correctly.
Electric shock due to induced voltage
Rotating machinery can induce dangerous high voltages and synchronous motors that are not
de-excited immediately can also pose a hazard. If the connection to the motor is not isolated or
grounded, these voltages can also remain. Touching live parts can result in death or serious
injury.
● Before opening the doors, wait until the connected machine has come to a standstill.
Electric shock at DC link capacitors
High voltages are still present at the DC link capacitors even after shutdown. Touching live
parts can result in death or serious injury.
● A label specifies the discharge times of the DC link capacitors. Only open the doors once
these discharge times have elapsed.
● Observe the five safety rules when performing any work.
Electric shock caused by high auxiliary voltages
High auxiliary voltages are still present even after shutdown. Touching live parts can result in
death or serious injury.
● Observe the five safety rules when performing any work.
Danger due to hazardous arcing
Hazards caused by arcing can occur as result of the following factors, for example:
● The input currents are exceeded.
● Incorrectly dimensioned circuit breaker or transformers.
● Incorrectly connected cables or cables that have not been connected.
Safety instructions
2.4 Safe handling
SINAMICS SM150 6SL3845-7NN46-7AA2
Operating Instructions Rev.201910281345 EXAMPLE 17
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