Motor components and options
4.3 Special options
1FT2 synchronous motors for SINAMICS S120
56 Configuration Manual, 03/2021, A5E50645584B AA
A connection with M5 thread is provided in the power connector.
When supplied, the M5 thread is sealed with an Allen screw with flat head, sealed with
FluidD. The FluidD remains pasty and does not harden.
When required, you can remove the FluidD using a non-lint dry cloth, possibly with some
ethyl alcohol (spirit).
If you do not use another seal, e.g. a flat seal, then you can again seal the connection using
FluidD.
Use for the pressure equalization:
When cooling down after being operated, a vacuum condition can occur inside the motor. In
a moist and humid environment, a defined pressure equalization can be realized to prevent
that liquid from being drawn in.
• In power connector ①, connect a hose for the pressure equalization through a hose
sleeve.
Note
This hose must be routed to an area in which cle
an and dry air is drawn in. If this is not
possible, ensure that dirt and pollution cannot enter the motor by using a suitable filter.
M5 connection for pressure equalization
Connecting nipple, e.g. Festo QSM-B-M5-4-20
Hose, outer diameter 4 mm, inner diameter 2.5 mm
Connection tightening torque: 3.5 Nm to 5 Nm
Motor damage due to continuous overpressure condition
As a result of its degree of protection, the 1FT2 motor cannot continually tolerate an
overpressure condition. When subject to continuous overpressure, pressurized air can leak
with an associated damaging airflow through the motor - thus causing damage to the
motor.
Only use the connection to equalize the pressure in the motor.
Option "Pressure equalizing connection" is only available for the following 1FT2 motors:
1FT2☐☐☐-☐☐☐☐1-☐☐B☐
1FT2☐☐☐-☐☐☐☐2-☐☐B☐
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