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1-Phase Power Supply, Primary Switch Mode for Use in Potentially Explosive Areas –
QUINT 24 V DC/10A/EX
7.2. Temperature Response
The device can supply a nominal current of 10 A up
to an ambient temperature of 60°C (140°F). With an
ambient temperature of up to 40°C (104°F) the device
continuously supplies an output current of 15 A. At
temperatures up to 60°C (140°F), the POWER BOOST
provides a short-term output current of 15 A for a few
minutes.
The device does not switch off in the event of a
15
10
U OUT = 24 V
thermal overload. The output power is decreased to
such an extent that device protection is provided. Once
the device has cooled, the output power is increased
again.
7.3. Parallel Operation
Devices of the same type can be connected in
0
0
20 40 60
Ambient temperature [°C]
Figure 16
parallel to increase both redundancy and power. The
default setting does not have to be adjusted.
If the output voltage is adjusted, an even current
distribution can be ensured by precisely setting all
power supplies that are operated in parallel to the
same output voltage.
QUINT
10 A
+ –
QUINT
10 A
+ –
To ensure symmetrical current distribution we
recommend that all cable connections from the power
supply to the DIN rail are the same length and have the
same cross section.
Depending on the system, for parallel connection of
+
–
more than two power supplies a protective circuit
should be installed at each individual device output
(e.g., redundancy module or DC fuse). This means that
in the event of a secondary device fault high return
currents are avoided.
7.4. Redundancy Operation (Figure 17)
Redundant connections are designed for supplying
systems, which place particularly high requirements on
operational safety. If a fault occurs in the primary circuit
+ –
Σ = 10 A
Figure 17
of device 1, device 2 automatically takes over the
complete power supply without interruption and vice
QUINT
10 A
+ –
QUINT
10 A
+ –
versa.
For this purpose, the power supplies to be connected
in parallel must be large enough that the total current
requirements of all loads can be fully met by one power
supply.
+
–
External decoupling diodes are required for 100%
redundancy. For example, the QUINT-DIODE/
40 redundancy module could be used
(Order No.: 29 38 96 3).
7.5. Power Increase (Figure 18)
The output current can be increased to n x I N where
n is the number of devices connected in parallel.
The parallel connection for power increase can be
used to extend existing systems. A parallel connection
is recommended if the power supply does not cover the
current consumption of the most powerful load.
Otherwise, the loads should be divided over
independent individual devices.
A maximum of ? ve devices can be connected in
parallel.
PHOENIX CONTACT page 10 of 10
+ –
Σ = 20 A
Figure 18
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