Applications
9.1 Redundancy circuit for increased system availability
SITOP expansion modules
108 Equipment Manual, 09.2022, A5E36605235-2-76
Redundancy of two power supplies with maximum rated output currents of 10 A
Two power supplies with maximum rated output currents of 10 A can be decoupled through
two SITOP PSE202U 10 A redundancy modules (6EP1964-2BA00). To do this, output "+" of
each power supply is connected to both inputs of a redundancy module ("IN 24 V-1" and "IN
24 V-2" jumpered); outputs "OUT 24 V" of the two redundancy modules must be connected in
parallel through an external connection (terminal) and connected to the load circuit.
Figure 9-2 Redundancy of two power supplies with maximum rated output currents of 10 A
Redundancy of two power supplies with maximum rated output currents of 20 A
Two power supplies with maximum rated output currents of 20 A can be decoupled through
a SITOP PSE202U 40 A redundancy module (6EP1961-3BA21). To do this, outputs "+" of the
power supplies are connected to inputs "IN 24 V-1" and "IN 24 V-2 of the redundancy module,
output "OUT 24 V" of the redundancy module is connected to the load circuit.
Figure 9-3 Redundancy of two power supplies with maximum rated output currents of 20 A
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