S120 Combi Power Modules
4.2 Safety information
74
SINAMICS S120 Combi
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5
Danger to life from electric shock in the event of voltage flashovers at the temperature
sensor
Voltage flashovers in the signal electronics can occur in motors without safe electrical
separation of the temperature sensors.
• Only use temperature sensors that fully comply with the specifications of the safety
isolation.
• If protective separation cannot be guaranteed (with linear motors or third-party motors,
for example), use a Sensor Module External (SME120 or SME125) or the TM120
Terminal Module.
Fire hazard due to overheating because of inadequate ventilation clearances
Inadequate ventilation clearances can cause overheating with a risk for personnel through
smoke development and fire. This can also result in more downtimes and Line Modules
may have a reduced service life.
• It is absolutely essential that you maintain ventilation clearances according to the tabl
e
V
entilation clearances above and below the component (Page 310).
Fire hazard due to overheating when permissible cable lengths are exceeded
Excessively long cable lengths can cause components to overheat with the associated risk
of fire and development of smoke.
• The total length of the power cables (motor feeder cables etc.) must not exceed 175 m.
Fire hazard and damage to devices during operation without a line reactor
Operating a system without a line reactor can trigger a fire with smoke development.
• Do not operate the system without a line reactor.
Material damage due to loose power connections
Insufficient tightening torques or vibrations can result in faulty electrical connections. This
can cause fire damage or malfunctions.
• Tighten all the DC link busbar screws with the specified tightening torques (1.8 Nm
tolerance +30 %).
• Check the tightening torques of all power connections at regular intervals and tight
en
t
hem when required. This applies in particular after transport.
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