Operator control at the device
3.6 ELECTRONIC SHUTDOWN and CONSTANT CURRENT operating modes
Power supply system SITOP PSU8600
Manual, 09.2018, A5E36758446-5-76
93
ELECTRONIC SHUTDOWN and CONSTANT CURRENT operating
modes
Two overload responses can be defined for output 1:
● In the ELECTRONIC SHUTDOWN operating mode, overload is permitted for a defined
time. The output is electronically switched off after the limit value has been exceeded,
see Chapter "Overload shutdown and carrying out a reset (Page 85)".
● In the CONSTANT CURRENT operating mode, an overload current is continually
permissible according to a defined characteristic (U/I characteristic). The overload current
is limited for 5 seconds to a maximum of 150 % of the set value of the current
potentiometer (LED "ON/OFF/RST" of the output flashes quickly). The current is then
limited to 100 % of the set value as long as the overload exists (LED "ON/OFF/RST" of
the output slowly flashes green).
In addition, in this operating mode, if a CNX8600 expansion module is not being used, a
brief Power Boost (300 % for 25 ms) is provided so that the downstream circuit breaker
can trip when an overload condition occurs.
Note
How the system responds to overload may only be switched o
ver when the power supply
-voltage state.
The switchover is made at DIP switch with the designation "UI-1" ⑥ (see operator controls).
When delivered, the DIP switch "UI-1" is in position "OFF" (ELECTRONIC SHUTDOWN
operating mode).
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