CS10.241, CS10.241-S1

C-Line

The power supply shall not be used in parallel to increase the output current.

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, see also chapter 22.5.

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 defective unit becomes a load for the other power supplies

and the output voltage can no longer be maintained. This can be avoided by utilizing redundancy modules, which

have decoupling devices (diodes or MOSFETs) included. Further information and wiring configurations can be found in

chapter 21.3.

Recommendations for building redundant power systems:

a)

Use separate input fuses for each power supply.

b)

Monitor the individual power supply units.

Therefore, use the DC-OK relay contact of the YRM2.DIODE.

c)

It is desirable to set the output voltages of all units to the same value (± 100mV) or leave it at the factory setting.

Unit A

AC

DC

Unit B

AC

DC

-

+

-

+

Load

+

-

Earth

(see notes)

Power supplies of the same type can be connected in series for higher

output voltages. It is possible to connect as many units in series as needed,

providing the sum of the output voltage does not exceed 150Vdc. Voltages

with a potential above 60Vdc are no longer SELV and can be dangerous.

Such voltages must be installed with a protection against touching.

Earthing of the output is required when the sum of the output voltage is

above 60Vdc.

Avoid return voltage (e.g. from a decelerating motor or battery) which is

applied to the output terminals.

Keep an installation clearance of 15mm (left / right) between two power supplies and avoid installing the power

supplies on top of each other. Do not use power supplies in series in mounting orientations other than the standard

mounting orientation (input terminals on bottom of the unit).

Pay attention that leakage current, EMI, inrush current, harmonics will increase when using multiple power supplies.

The unit is designed to supply any kind of loads, including capacitive and inductive loads.

Jul. 2015 / Rev. 2.0 DS-CS10.241-EN

All parameters are specified at 24V, 10A, 230Vac, 50Hz, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.

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