① Driven machine ④ Insulated bearings
② Motor ⑤ Insulated tachometer tting
③ Coupling
Figure4-1 Schematic representation of a single drive
NOTICE
Bearing damage
The bearing insulation must not be bridged. Bearing currents can damage bearings.
• Do not bridge the bearing insulation for subsequent installation work, such as the
installation of an automatic lubrication system or a non-insulated vibration sensor.
• If you have any questions, please contact the Service Center (Page12).
If you connect 2 motors in series in "tandem operation", install an insulated coupling
between the motors.
① Driven machine ④ Insulated bearings
② Motor ⑤ Insulated tachometer tting
③ Coupling ⑥ Insulated coupling
Figure4-2 Schematic representation of a tandem drive
NOTICE
Bearing damage
Bearing currents can ow if the coupling between the motors of the tandem drive is not
insulated. This can damage the DE bearings of both motors.
• Use an insulated coupling to couple the motors.
Preparing for use
4.14Converter operation
1MB..1/2/3/4 - shaft heights 63 ... 355
58 Operating Instructions, 11/2023, A5E52779900A
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