Applications
12.2 Parallel connection for redundancy
Power supply system SITOP PSU8600
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Manual, 09.2018, A5E36758446-5-76
12.2
Parallel connection for redundancy
Connecting several SITOP PSU8600 basic devices in parallel to create a redundant system
is required if especially high requirements are placed on a very reliable 24-V supply.
When using the SITOP PSE202U redundancy module, two identical basic devices can be
decoupled up to 20 A when operating with an output voltage 24 - 28 V. When one of the
devices fails, then the other automatically takes over the supply. If one of the basic devices
fails, then this is signaled using an LED on the redundancy module as well as an isolated
relay contact.
For higher output current, each basic device must be connected to a redundancy module.
When dimensioning the system, it must be ensured that n+1 redundant connected basic
devices can handle the total power requirement of the remaining n basic devices.
Note
For a high reliability of the supply, it is recommended that the basic devices connected in a
redundant configuration are fused separately on the line-side and, if possible, connected to
different power supply networks.
Redundant configuration with two power supplies and SITOP PSE202U redundancy module
