PU300/PU500 INSTALLATION MANUAL
10232-10.doc
Polyamp AB, Sweden
www.polyamp.com
Page
4 (10)
1 Before installation
On the front panel label the following is displayed:
Converter type name, input voltage range, nominal
output voltage, serial number, options and article
number. The converter type name consists of model
name PU300 or PU500 followed by input code and
output voltage. Two examples:
”Type: PU300B24” has input code ”B” and
nominal output voltage 24Vd.c.
”Type: PU500 110/48” has input code ”110”
and nominal output voltage 48Vd.c.
Input, output and case are galvanically separated
from each other. You can thus choose how you
want the system connected.
The input is protected against reverse polarity by a
parallel diode at the input on models with input
code A, B, 24 and 48. This diode, however, is only
intended to blow an external input fuse. C, D, 110
and 220 input codes have a series diode.
The input shall be fused with an approved fuse with
a slow blow characteristic and high breaking
capacity
.
See
Table 1
.
PU300 input fuses
Input voltage code
Time delay fuse
A 35
A
B 25
A
C 8
A
D 5
A
PU500 input fuses
Input voltage code
Time delay fuse
24 30
A
48 20
A
110
8 A
220
4 A
Table 1. Recommended input fuses.
There are two reasons why we do not include the
fuse.
1.
DC-networks should be fused at the distribution
point to protect the cable.
2.
Different applications require different types of
fuses.
If the converter is mounted in an electric vehicle, an
external series diode on the input is recommended.
Please contact your Polyamp dealer.
If the converter supplies a DC-motor, we
recommend an external parallel diode at the motor
poles to protect against reverse voltages.
For the disconnection ability, an external
disconnection device, which is able to disconnect
both polarities, shall be incorporated with the input
power supply cord. The disconnection device must
be properly labelled and easy accessible.
2 Installation
The converter shall be mounted in an enclosure,
which meets the demands of EN60950 regarding
fire, voltage hazard and mechanical strength.
The converter is supplied with mounting plates.
With these you can mount the converter in any
direction. The converter is convection cooled and in
order to get sufficient cooling there shall be a
minimum of 30 to 50 mm space at upper and lower
parts of the converter. If this is not possible, we
recommend the use of an external fan.
Note that the expected life of the converter is
dependant on converter temperature. For every
10
C that the temperature is lowered the expected
life is approximately doubled. It is therefore crucial
to cater for good ventilation and if possible to
reduce ambient temperature.
To meet the EMC specifications in the enclosed
”declaration of conformity” use twisted-pairs for
connecting input, output and alarm. Shielded cables
are not necessary.
1.
Connect protective earth to the connection
marked no 40. Use a ring terminal that has been
crimped by an appropriate tool
.
2.
Connect the output. 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.
If the converter is to be connected in parallel
at the output, please consult
3 Parallel
connection
on page 5.
If you use multiple loads, please consult
4
Multiple loads at the
output on page 6.
If you intend to use the alarm, please consult
6
Alarm on page 7.
If you intend to use output voltage sense,
please consult
5
Sense on page 7.
If you intend to use inhibit, please consult
7
Inhibit on page 8.
3.
Connect the input cables. Bundle input cables
together at the terminals separated from the
output cables. Make the same
arrangement on
the output side. This is to make sure one
