● Precharging resistors
● Contactor for switching on and off
● Circuit-breaker
Detailed information about interconnecting the precharging components is provided in the
circuit manual. The component mounting locations are provided in the layout diagram.
3.4.5 Power Stack Adapter
The Power Stack Adapter (PSA) acts as the physical interface between the power unit and
the open-loop/closed-loop controller. This is where the galvanic isolation (electrical coupling
via light) between the power unit and the open-loop controller takes place. Data is exchanged
between the Power Stack Adapter and the Control Unit via the DRIVE-CLiQ high-speed serial
communication interface.
Description
3.4 Components
SINAMICS SM120 6SL38855?B
Operating Instructions 12/2015 35
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