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.
4.13.5 Tandem operation
If you connect two motors in series in "tandem operation", locate a coupling between the
motors; this coupling should satisfy the Directive 2014/34/EU or the regulations that apply in the
country where the equipment is installed.
4.13.6 Speed limits for converter operation
Observe the information on the rating plate regarding the speed limits for converter operation.
Preparing for use
4.13Converter operation
1LE5, 1PC4 shaft heights 280 ... 355
48 Operating Instructions, 11/2022, A5E41454666A
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