ML120.244
MiniLine-2
24V,
5A,
S
INGLE
P
HASE
I
NPUT
22.6.
P
ARALLEL
U
SE FOR
R
EDUNDANCY
MLY10.241
IN 1
+
-
+
-
L
N
I
I
ML120.244
L N
Output
Input
+ +
- -
ML120.244
L N
Output
Input
+ +
- -
Output
Load
+
- -
+
-
IN 2
Voltage
Monitor
Power supplies can be paralleled for redundancy to gain higher
system availability. Redundant systems require a certain amount of
extra power to support the load in case one power supply unit fails.
The simplest way is to put two power supplies in parallel. This is called
a 1+1 redundancy. In case one power supply unit fails, the other one is
automatically able to support the load current without any
interruption. Redundant systems for a higher power demand are
usually built in a N+1 method. E.g. five power supplies, each rated for
5A are paralleled to build a 20A redundant system.
Please note:
This simple way to build a redundant system does not
cover failures such as an internal short circuit in the secondary side of the power supply. In such a case, the defect unit
becomes a load for the other power supplies and the output voltage can not be maintained any more. This can only be
avoided by utilizing decoupling diodes which are included in the redundancy module MLY10.241 or YRM2.DIODE.
Recommendations for building redundant power systems:
a)
Use separate input fuses for each
power supply.
b)
Use separate mains systems for each power supply whenever it is possible.
c)
Monitor the individual power supply units. A monitoring circuit is included in the DIMENSION redundancy
module YRM2.DIODE, which can also be used as a redundancy module for the ML120.241 units.
d)
1+1 Redundancy is allowed up to an ambient temperature of 60°C.
N+1 Redundancy is allowed up to an ambient temperature of 45°C.
e)
It is desirable to set the output voltages of all units to the same value (± 100mV) or leave it at the factory setting.
22.7.
D
AISY
C
HAINING OF
O
UTPUTS
Daisy chaining (jumping from one power supply output to the next) is allowed as long as the average output current
through one terminal pin does not exceed 25A. If the current is higher, use a separate distribution terminal block.
Fig. 22-3 Daisy chaining of outputs
Fig. 22-4 Using distribution terminals
Load
+
-
Power
Supply
+ +
-
-
Output
max 25A!
continuous
Power
Supply
+ +
-
-
Output
Load
+
-
Distribution
Terminals
Power
Supply
+ +
- -
Input
Output
Power
Supply
+ +
- -
Input
Output
22.8.
I
NDUCTIVE AND
C
APACITIVE
L
OADS
The unit is designed to supply any type of load, including unlimited capacitive and inductive loads.
Apr. 2013 / Rev. 1.1 DS-ML120.244-EN
All parameters are specified at 24V, 5A, 230Vac input, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.
www.pulspower.com Phone +49 89 9278 0 Germany
19/21