Preparing for use
4.14 Converter operation
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
50 Operating Instructions, 06/2018, A5E44455710A
If you connect two motors in series in "tandem operation", install an insulated coupling
between the motors.
Insulated tachometer fitting
Figure 4-3 Schematic representation of a tandem drive
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.
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.
Speed limits for converter operation
Observe the information on the rating plate regarding the speed limits for converter
operation.
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