Siemens SITOP PSU8600, Руководство пользователя

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Operator control at the device
3.16 Monitoring functions
Power supply system SITOP PSU8600
Manual, 09.2018, A5E36758446-5-76
113
3.16.3 System overload monitoring
In order to permit brief, higher switch-on currents of the loads to be supplied, the system has a
dynamic overload capability of 150 % of the rated power for a permissible duration of 5 s/min.
If the system is briefly operated in the range of the dynamic overload capability
(101 …150 % of the rated power), LED "O.K."
①
at the basic unit flashes green.
Note
A shutdown as a result of a system overload can only occur when using expansion modules.
When operating the basic unit without expansion modules, the dynamic overload capability
of the system cannot be exceeded as a result of the coordinated shutdown characteristics of
the output at the basic unit.
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 output of the basic unit is automatically limited for a duration of 60 s; this means that
in the case of an overload, the output current is limited to the maximum rated output current.
The outputs of the expansion modules are simultaneously switched off.
The following signals indicate the operating state:
● green (in buffer operation, yellow) flashing LED "O.K."
①
at the basic unit
● red LED "O.K."
①
of the expansion modules
● Red LEDs "ON/OFF/RST"
②
of the outputs of the expansion modules
● The signaling contact at the basic unit
①
LED "O.K."
②
LED "ON/OFF/RST"