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Single-Phase Primary-Switched Power Supply Unit for Universal Use – QUINT 48 V DC/20 A
T- .:
QU er-N
Or
6.6. Output (Figure 11)
The 48 V DC connection is made using the "+" and
"-" screw connections on the screw connection 2 . The
output voltage set upon delivery is 48 V DC.
The output voltage can be adjusted from
30 - 56 V DC on the potentiometer 5 .
6
IN o
d
PS
30 d s
.0- u t
56
DC
K
K
u
+ t D
pu
AL
OV INDU T
PR
CO UI
AP
EQ KA
U
TE
R e f o r e
Protecting the Secondary Side:
The device is electronically short-circuit-proof and
idling-proof. In the event of an error, the output voltage
is limited to a maximum of 60 V DC.
It should be ensured that all output cables are the
correct size for the maximum output current or have
separate fuse protection.
The cable cross sections in the secondary circuit
should be large enough to keep the voltage drops on
A
j
.0
4
V
13
14
O
+
O
DC
O
t
– C 48V
– 2 0 A
–
DC
OK
LIS
D
be
S
N
43
i
ad
the cables as low as possible.
3
2
Figure 11
Signaling
Both DC OK outputs are used for preventive function
monitoring of the power supply. A ? oating signal
contact 4 and an active DC OK signal 3 are available.
Inaddition,theDCOKLED6canbeusedtoevaluate
the function of the power supply directly at the
installation location.
Floating Contact (Figure 12)
Output 48 V DC
When opened, the ? oating signal contact indicates
that the output voltage has fallen more than 10% below
the set value. Signals and ohmic loads up to a
maximum of 60 V and currents up to a maximum of
0.5 A can be switched.
With heavy inductive loads, e.g., a relay, a suitable
protective circuit (e.g., free-wheeling diode) is required.
13 14
++–––
DC OK
60 V AC/DC, 0.5 A, maximum
Active Signal Output (Figure 13)
The 24 V DC signal is between the "DC OK" and "-"
connection terminal blocks and can be loaded with
20 mA maximum. This signal output indicates that the
output voltage has fallen more than 10% below the set
value when "active high" changes to "low".
The DC OK signal is isolated from the power output.
This ensures that a separate supply does not enter
from devices connected in parallel.
The 24 V DC signal can be connected directly to a
Output 48 V DC
Figure 12
logic input for evaluation.
13 14
++–––
DC OK
24 V DC
20 mA
Figure 13
PHOENIX CONTACT page 8 of 10
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