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Overview of power and control connections
Input power connections of the IGBT supply unit are terminals L1, L2 and L3 located in the
lower part of the incoming cubicle. Power cables enter the cabinet via lead-throughs on the
floor of the cubicle as standard. A cabinet-installed supply unit is typically controlled using
the local control devices installed on the cabinet door. No additional control connections
are needed. However, it is possible to:
•
control the unit through the control panel and the fieldbus
•
read the status information through the control panel, fieldbus and relay output
•
halt the unit with an externally wired emergency stop button (if the unit is equipped with
an emergency stop option).
The supply unit I/O control interface is mostly in internal use.
Operation principle and hardware description 25
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