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1-Phase Power Supply, Primary Switch Mode for Use in Potentially Explosive Areas –
QUINT 24 V DC/5 A/EX
6.6. Output (Figure 11)
During operation only devices, which are suitable for
4
3
2
operation in potentially explosive areas of zone 2, can
OK C
14 D
O
ut O K
+–
tD
–
4V
K
. - d u
22 A
28 j st
. V
be connected to the output voltage in zone 2.
The 24 V DC connection is made using the "+" and
"-" screw connections on the screw connection 2 . The
output voltage set upon delivery is 24 V DC.
The output voltage can be adjusted from 22.5 to
28.5 V DC on the potentiometer 5 . The output voltage
cannot be adjusted during operation in potentially
explosive areas.
Protecting the Secondary Side:
The device is electronic short-circuit-proof and idling-
proof. In the event of an error, the output voltage is
limited to a maximum of 35 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 secondary side cables should have large cross
sections to keep voltage drops on the cables to a
minimum.
External decoupling diodes are required for
redundancy operation of these power supplies.
For example, the QUINT-DIODE/40 redundancy
module could be used (Order No.: 29 38 96 3).
13
13
14 D
+
+
C
pu +
C
2
DC
O
5
5
–
5A
–
5
Figure 11
Signaling
Both DC OK outputs are used for preventive function
monitoring of the power supply. An electrically isolated
Output 24V DC
signal contact 4 and an active DC OK signal 3 are
available. In addition, the DC OK LED 6 can be used
to evaluate the function of the power supply directly at
13
14
+ + – –
the installation location.
Green "DC OK" LED
Active
DC OK switching output
(with reference to "-")
ON
U = 24 V
Flashing
U = 0V
OFF
U = 0V
DC OK
max.
30 VAC/DC, 1 A
Electrically isolated
DC OK output
Meaning
Closed
Output voltage
Open
Output voltage
Open
No voltage at the
greater than 90% less than 90% of output
of the set voltage the set voltage
Figure 12
Description
Output voltage
and current OK
QUINT POWER
operating, but:
? Error at the load
? Current
consumption
greater than
I BOOST
? Output short
QUINT POWER
not operating,
because:
? No mains
voltage present
? Primary side
fuse is blown
? Device is faulty
circuit
Electrically Isolated Contact (Figure 12)
When opened, the electrically isolated 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 30 V and currents up to a maximum
of 1 A can be switched.
With heavy inductive loads, e.g., a relay, a suitable
protective circuit (e.g., free-wheeling diode) is required.
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