K.E.R.T COSMO 1500 Handbuch Seite 15

Overvoltage protection
The following message is shown on the display when this protection
intervenes
OVERVOLTAGE PROTECTION
and the output is disconnected.
To restore the power supply, lower the output voltage and reset by
pressing the push button 8.
Polarity reversal
If you want to use the power supply to charge batteries and you
mistakenly connect the battery with the wrong polarity, the output
is disconnected and the following message is displayed
POLARITY PROTECTION
To restore the power supply, connect the correct polarity and reset
the power supply with the push button 8.
Warning: the threshold voltage for polarity reversal is 0.5 V. It is the-
refore possible that for certain types of load and for low power sup-
ply voltages, you will find that the threshold is exceeded and hence
the protection is activated when it is switched on. In this event, we
recommend you reset the voltage to zero, connect the load by pres-
sing push button 7 and adjust the voltage starting from zero.
External control of the COSMO 1500 - 1500/1 - 3000
SYSTEM 150 - 300 - 150/1 - 420 series
Through a connector located on the rear panel (19), it is possible to
externally control the voltage and the current of the power supply
with an external voltage varying from 0 to 8V DC.
External control of the voltage and current
a) reset the voltage and current to zero with the potentiometers 11,
12, 13 and 14
b) connect it by using a male connector as shown in the drawing
4
3
2
Master voltage adjustment
0÷8V DC
external side view of the DIN connector
c) [1-2] voltage adjustment, [1-4] current adjustment
pag. 15
Current adjustment
0÷8V DC
5
6
1
Common negative
GB