PM50/PM80 INSTALLATION MANUAL
10231-10.doc
Polyamp AB, Sweden
www.polyamp.com
Page
5 (7)
5.
The output voltage can be adjusted with the
potentiometer marked ”V.ADJ” on the front
panel. Clockwise turn increases the output
voltage. The potentiometer has one (1) turn.
6.
When the converter is disconnected, switch-off
the input voltage with the disconnecting unit.
Disconnect the input cables first, then output
and last the protective case connection.
3
Connecting the outputs for
series, parallel or master/slave
operation
You can choose how the two (2) outputs of
the converter shall be connected with the
jumpers that are supplied with the
converter. Connect the jumper(s) as drawn
in
א
to configure the outputs in series,
parallel or a master/slave configuration
with or without isolation between the two
outputs. ”15-15” output are adjusted to
12.0Vd.c. at delivery.
Figure 1. Output connections
If you have connected the outputs master/slave, the
master should be the output with the heaviest load,
as this is the regulated output.
4
Parallel connection of two
converters or more
If the converter is to be connected in parallel at the
output with another unit we recommend the use of
an external series diode. 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.
5
Isolation voltage test
Each converter has been isolation tested in factory
before delivery. The isolation voltage depends on
nominal inputs and outputs, see
table 2
.
Warning! An isolation test shall only be
performed by personnel aware of the dangers
and hazards of the test.
Input
code
Isolation
In/out,
In/case
Isolation
out/case
Isolation
out1/out2
24, 48,
A, B
2.0kVd.c. 1.0kVd.c. 500Vd.c.
110, 220,
C, D
2.5kVa.c. 1.0kVd.c. 500Vd.c.
Table 2. Isolation voltages on different
converters.
5.1
DC isolation test output to case
1.
Disconnect all cables from the converter.
2.
Connect the input terminals of the converter to
case.
3.
Connect the output terminals together.
4.
Connect your isolation tester between output
and case. See
ב
. Raise the voltage of the
isolation tester from 0 to 1000Vd.c. Check that
the leakage current does not exceed 5µA. The
voltage should not be applied for more than a
few seconds or the Y-capacitors might be
damaged.
5.
Turn off the isolation tester and discharge the
test voltage with a 10 M
Ω
resistor between
output and case.
Series connection
24 to 32V (PM50?/15-15)
48V (PM80 ?/24-24)
110 to 130V (PM50?/60-60)
Parallel connection
12 to 16V (PM50?/15-15)
24V (PM80 ?/24-24)
55 to 65V (PM50?/60-60)
Master/slave connection
2x12 to 16V (PM50?/15-15)
2x24V (PM80 ?/24-24)
2x55 to 65V (PM50?/60-60)
Master/slave connection
±12 to 16V (PM50?/15-15)
±24V (PM80 ?/24-24)
±55 to 65V (PM50?/60-60)
? = Any input code.
M = Master (U1)
S = Slave (U2)
