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QUINT-PS/ 1AC/24DC/40
Parallel operation
Devices of the same type can be connected in parallel to
increase both redundancy and power. By default upon
delivery, no further adjustments are required.
If the output voltage is adjusted, a uniform distribution of
power is guaranteed by setting all parallel operated power
supply units to exactly the same output voltage.
To ensure symmetrical current distribution we recommend
that all cable connections from the power supply unit to the
busbar 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., decoupling
diode, DC fuse or circuit breaker). This prevents high return
currents in the event of a secondary device fault.
Redundant operation
I N
+ ?
I N
+ ?
Redundant circuits are suitable for the supply of systems
which make especially high requirements on the operational
safety. If a fault occurs in the primary circuit of the first power
supply unit, the second device automatically takes over the
+
?
entire power supply, without interruption, and vice versa. For
this reason, the power supply units to be connected in parallel
are dimensioned in such a way that the total current
requirement of all consumers can be completely covered by
one power supply unit. 100% redundancy makes external
+ ?
Σ = I N
decoupling diodes necessary (QUINT-DIODE/40, Order No.
2938963)!
Increased performance
I N
+ ?
I N
+ ?
For n parallel connected devices, the output current can be
increased to n x I N . Parallel connection for increasing power
is used when extending existing systems. A parallel
connection is recommended if the power supply unit does not
+
?
+ ?
Σ = 2 x I N
cover the current consumption of the most powerful load.
Otherwise, the load should be divided between individual
devices that are independent from one another.
104317_en_01
PHOENIX CONTACT GmbH & Co. KG ? 32823 Blomberg ? Germany ? Phone: +49-(0) 5235-3-00
PHOENIX CONTACT ? P.O.Box 4100 ? Harrisburg ? PA 17111-0100 ? USA ? Phone: +717-944-1300
www.phoenixcontact.com
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