In the scope of such spare parts-compatible ongoing development, plug connector or
connection positions are sometimes slightly modied. This does not cause any problems
when the components are properly used. Please take this fact into consideration in special
installation situations (e.g. allow sucient reserve regarding the cable length).
10.1 Replacing the converter hardware
Overview
You may only replace a converter with a dierent converter under certain preconditions.
Requirement
The following preconditions apply for making a replacement:
• The new converter has the same or more recent rmware version than that of the converter
being replaced.
• The two converters must also satisfy one of the following conditions:
– The new and replaced converters have the same power rating.
– The new converter has a dierent power rating than the converter it replaced, but still has
the same frame size.
In this case, the rated power of the converter and the rated motor power must not dier
too much.
The following values are permissible for the quotients (rated motor power)/(rated
converter power): 0.25 … 1.5
Description
WARNING
Unexpected machine motion caused by incorrect converter type
Replacing converters of dierent types can result in incomplete or incorrect/inappropriate
converter settings. As a consequence, machines can unexpectedly move, e.g. speed
oscillation, overspeed or incorrect direction of rotation. Unexpected machine motion can result
in death, injury and/or material damage.
• In all cases not permitted according to the above precondition, you must recommission the
drive after replacing the converter.
Corrective maintenance
10.1Replacing the converter hardware
SINAMICS G120C Converters
380 Operating Instructions, 02/2023, FW V4.7 SP14, A5E34263257B AK
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