Applications
9.2 Design of 24 V load feeders with power limiting according to NEC class2
SITOP expansion modules
110 Equipment Manual, 09.2022, A5E36605235-2-76
9.2 Design of 24 V load feeders with power limiting according to NEC
class2
A 24 V power supply with power limiting according to NEC class2 can be implemented using
a SITOP PSE202U Class2 redundancy module (6EP1962-2BA00). To implement this, output
"+" of the power supply is connected to both inputs of a redundancy module ("IN 24 V-1" and
"IN 24 V-2" jumpered); the output power of the load circuit at output "OUT 24 V" of the
redundancy module is limited to 100 VA. Several load circuits connected in parallel, whose
output power is limited, can be implemented with several redundancy modules.
Figure 9-5 Design of 24 V load feeders with power limiting according to NEC class2
The feeding SITOP power supply must be certified according to UL60950-1.
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