Siemens SITOP PSU400M, Manual, Page: 16 / 58

Description, device design, dimension drawing
2.5 Selector switch
SITOP PSU400M
16
Manual, 05.2018, C98130-A7601-A1-5-7629
Switch ON OFF
A
influences the output
characteristic
in the load range
Parallel operation:
"Soft" characteristic curve (see Figure 6-7 Out-
put characteristic parallel operation (Page 37))
for the parallel operation of two or more devic-
es: The output voltage falls with increasing
output current (namely, also for the overcurrent
pulse!).
This means that for full output current the high-
est output voltage can normally no longer be
attained.
Single operation:
Delivery state
"Hard" characteristic curve (see Figure 6-6
Output characteristic single operation
(Page 36)) for normal operation (single opera-
tion): The output voltage is independent of the
output current.
B
influences the output
characteristic
in the overload range
Latching shutdown:
If the output current rises above the rated value
and above the current limit, the device reduces
the output voltage (see Figure 6-8 Output char-
acteristic latching shutdown (Page 37)). If the
output voltage falls below 20 V, the device
shuts down latching, the red LED lights up. This
limit voltage of 20 V is independent of the set
output voltage. The 'Short-time overload cur-
rent' feature is not available in this operating
mode. In order to also be able to charge large
capacitances in this operating mode at the
output, non-latching shutdown is performed
during the first ten seconds after power on.
During these first 10 s, the device responds for
overload as if the switch is "OFF".
Constant current:
Delivery state
If the output current rises above the rated value
and above the current limit, the device reduces
the output voltage. The yellow LED lights up if
the output voltage falls below 20 V.
C Start delay 10 s Immediate start
Delivery state
Note
Selector switches may only be activated when the device is switched off.