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MINI-SYS-PS-100-240AC/24DC/1.5
Parallel operation
Due to the current carrying capacity, a maximum of two de-
vices may be connected in parallel on the DIN rail connector
for redundancy. Without using the DIN rail connector, de-
vices of the same type can be connected in parallel both for
redundancy reasons as well as to improve performance.
To ensure symmetrical distribution of power, we recommend
designing all cable connections from the power supply unit to
a busbar of the same length and with the same conductor
cross section. The system makes it advisable to install a pro-
tective circuit at the output of each device when more than
two power supply units are connected in parallel (e.g. decou-
pling diode or DC fuse). This prevents high reverse feed cur-
rents 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 paral-
lel are dimensioned in such a way that the total current re-
quirement 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 to increase efficiency
is used for the expansion of existing systems. It is advisable
to use parallel connection if the power supply unit does not
+
?
+ ?
Σ = 2 x I N
cover the current requirement of the most powerful con-
sumer. Otherwise the consumers should be spread among
individual devices independent of one another. A maximum
of five devices can be connected in parallel!
102050_01_en
PHOENIX CONTACT GmbH & Co. KG ? 32823 Blomberg ? Germany
Phone: +49-(0) 5235-3-00 ? Fax: +49-(0) 5235-3-4 12 00
PHOENIX CONTACT
11
www.phoenixcontact.com
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