Figure 4-3 Schematic Representation Of A Tandem Drive - Siemens SIMOTICS TN N-compact 1LH8 Operating Instructions & Installation Instructions

Tandem operation
If you connect two motors in series in "tandem operation", install an insulated coupling between
the motors.
①
②
③
Figure 4-3
NOTICE
Bearing damage
Bearing currents can flow 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 link the motors.
See also
Service and Support (Page 129)
SIMOTICS TN Series N-compact 1LH8
Operating Instructions 06/2017
Driving machine
Motor
Coupling
Schematic representation of a tandem drive
4.15 Converter operation
④
Insulated bearings
⑤
Insulated tachometer fitting
⑥
Insulated coupling
Preparations for use
41