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Description
3.6 Description of options
3.6.16
Circuit breaker at the drive output (option L52)
With this option, a circuit-breaker is integrated at the drive output. If isolation between the drive
output and drive motor is required for protection and safety reasons, this can be achieved by
means of the circuit-breaker. The circuit-breaker is controlled from the drive controller. When
an ON command is issued, the output-side circuit-breaker is activated along with the auxiliary
equipment. When an OFF command is issued, the circuit-breaker is deactivated.
3.6.17
Anti-condensation heating (option L55)
The anti-condensation heating is used at low ambient temperatures and high levels of humidity
to prevent condensation from forming. The heating is controlled via a thermostat.
The number of anti-condensation heaters is set in accordance with the number of cabinet
panels.
The converter monitors and signals if the external supply for the anti-condensation heating fails.
See also
Safety instructions for maintenance (Page 141)
3.6.18
EMERGENCY STOP Category 1 (option L60)
Emergency Off, stop category1 (24 VDC) for controlled stop according to IEC60204.
In the standard version, Emergency Off stop category 0 is set for an uncontrolled stop. It also
has a function for disconnecting the drive from the power supply via the circuit-breaker. The
motor coasts down. The Emergency Off, stop category 1 function includes rapid stopping of the
drive using a deceleration ramp to be parameterized by the user. Voltage is then disconnected
from the drive as described for Emergency Off, stop category 0.
The EMERGENCY OFF button with protective collar is installed in the drive cabinet door.
Danger from auxiliary voltages that are connected
When you press the EMERGENCY STOP button, the motor is stopped either uncontrolled or
controlled depending on the selected category 0 or 1, and the drive blocks the inverter, in line
with IEC60204-1 (VDE0113).
Auxiliary voltages such as those for separately-driven fans or anti-condensation heating are
still present. Certain areas within the drive also remain under voltage, e.g. the control function
or auxiliaries. When touching these auxiliary voltages, this can result in death or serious
physical injury.
Ensure that the EMERGENCY OFF button is integrated in the safety system for the whole
machine so that all the voltages are completely disconnected. For this purpose, an NC contact
is installed at terminals =.LA–X51:1A or 1C and =.LA–X51:2A or 2C.
66
WARNING
SINAMICS SM150 6SL3810-7NN38-0AA1
Operating Instructions Rev.201910281406 EXAMPLE
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