INSTALLATION MANUAL
PSC
series
AC
inputs
2011-04-26
Copyright 2000-2011
Page 6(14)
Installation with wall mounting panel
option N:
1. Check the pin-out,
see Figure 1
. Connect
protective earth pin 32. This provides
safety against electrical shock and is
required to achieve EMC performance
according to the declaration of conformity.
2. Connect the output. Be aware that if the
sense option ”S” is provided the sense
must be connected to the sensing point and
cannot be left open,
see sense option S
section 6.
Bundle the output cables
together, separate from input.
3. The converter output is short-circuit proof
by a constant current limit which works
unlimited in time. Therefore there is no
need to fuse the load (unless you use
multiple loads, see below). The current
limit is fixed to 105% of nominal output
current.
Figure 3. Wall mounting version N.
4.
Features and options
•
If the converter is to be connected in
parallel at the output, please consult
section
4 Parallel connection
on this
page.
•
If you use multiple loads, please
consult section 5
Multiple loads at the
output on page 9.
•
Check section 7 for the
output over
voltage protection page 10.
•
If you intend to use alarm feature,
please consult section
8 Under voltage
Alarm
on page 10.
5. Connect the input cables. Bundle input
cables together separated from the output
cables.
6. Start the converter by connecting the input
voltage
Beware of hazardous voltages!
The output voltage
can be adjusted ±10% of
nominal output voltage with the potentiometer
marked V.ADJ on the front panel. Clockwise
turn increases the output voltage. The
potentiometer has 15 turns. If you have
connected units in parallel on the output, the
procedure of adjusting the output voltage is
described in section
4.6 Adjusting output
voltage
when units are paralleled on the
output
on page 8.
3 Several output voltages
The PSC series models PSC80, PSC100 and
PSC150 can be supplied with one or two
auxiliary outputs. This manual regards only
single output models. There is a supplementary
manual for two or three outputs.
4 Parallel connection
If a redundant power supply system is
requested, two or more converters can be
connected in parallel. To achieve redundancy
the number of converters must be dimensioned
to carry the whole load even if one converter is
faulty. The option C or CR series diode on the
output must be provided. Connect your load to
the + output after the series diode (cathode).
Another reason for connecting two or more
converters in parallel is to get more power. The
option C must be provided. When the series
diode C or CR option is used the
Sense option
S, see chaper 6 page 9
, cannot be used.
4.1 Series diode on the output,
option C
A series diode is necessary if the output is
connected in parallel with another power
supply or if you require redundant operation. If
a converter breaks down with an internal short-
circuit on the output and other converters are
connected in parallel on the output, the broken
unit will short-circuit the others if the series
diode is not used. This might cause excessive
heat or even fire in the faulty unit.
The series diode protects the converter output
from external voltage sources.
