Tandem operation
If you connect two motors in series in "tandem operation", install an insulated coupling between
the motors.
① Driving machine ④ Insulated bearings
② Motor ⑤ Insulated tachometer fitting
③ Coupling ⑥ Insulated coupling
Image 4-3 Schematic representation of a tandem drive
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 137)
Preparations for use
4.13 Converter operation
SIMOTICS TN Series N-compact 1LA8
40 Operating Instructions 05/2016
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