QUINT-PS/24DC/24DC/ 5/CO
105537_en_02
PHOENIX CONTACT
13 / 22
12
Output
Connection of the output voltage is established via the
screw connectors on the DC output screw connection.
The output voltage can be set on the potentiometer.
Figure 7
Output
12.1
Protection of the secondary side
The DC/DC converter is electronically short-circuit-proof
and idling-proof. In the event of an error, the output voltage
is limited. It must be ensured that all output cables are
dimensioned accordingly for the maximum output current or
have separate protection.
The connecting cables on the secondary side should have
large cross sections to keep the voltage drops in the cables
as low as possible.
13
Output characteristic curve
The DC/DC converter works with the POWER BOOST
power reserve as shown in the U/I characteristic curve in the
figure. At ambient temperatures < 40°C, I
BOOST
is
permanently available. It is also available at higher
temperatures for a few minutes.
In the event of a secondary-side short circuit or overload, the
output current is limited to I
BOOST
. In this case, the DC/DC
converter does not switch off but supplies output current
continuously. The secondary voltage is then reduced until
the short circuit is eliminated. The U/I characteristic curve
with the POWER BOOST power reserve ensures that high
inrush currents of capacitive loads in the primary circuit can
be supplied reliably.
Figure 8
Output characteristic curve
–
U
N
= 24 V
–
I
N
= 5 A
–
I
BOOST
= 6.25 A
–
SFB Technology = 30 A (for 12 ms)
–
P
N
= 120 W
–
P
BOOST
= 150 W
QUINT PO
WER
+
-
Input D
C 24V
Ou
tpu
t DC
24
V
5 A
-
-
+
+
DC
OK Ι<
Ι
N
DC OK
Boost
18-29.5 V
-
U >
IN
19.2V
U
<9.6V
IN
!
I
[A]
OUT
U
[V]
OUT
U
N
I
N
I < I
N
<60 °C
U < 0,9 x U
N
I > I
N
<40 °C
I
BOOST
