Siemens SITOP BUF8600, Manual, Page: 78 / 252

Operator control at the device
3.10 Monitoring functions
PSU8600power supply systems
78
Manual, 04.2016, A5E35883207-7-76
If the system is briefly operated in the range of the dynamic overload capability (101 - 150 %
of the rated power), LED "OK"
①
at the basic device flashes green.
Note
A shutdown as a result of a system overload can only occur when using expansion modules.
When operating the basic device without expansion modules, the dynamic overload
capability of the system cannot be exceeded as a result of the coordinated shutdown
characteristics of the four outputs at the basic device.
When expanding the system using expansion modules (additional outputs), ensure that the
sum of the set response threshold values of the output currents does not exceed the total
power rating (current rating) of the system. Alternatively, by suitably configuring the load duty
cycle of the individual outputs, you can prevent the total power from being exceeded.
Identifying a shutdown due to system overload
When exceeding the permissible duration of the dynamic overload capability of 5 s/min, the
power of the outputs of the basic device are automatically limited for a duration of 60 s; this
means that in the case of an overload, the output current of each output is limited to the
maximum rated output current.
The outputs of the expansion modules are simultaneously shutdown.
This operating state is signaled by:
● Green (in buffer operation, yellow) flashing LED "OK"
①
at the basic device
● Red LED "OK"
①
of the expansion modules