Redundant Power supply in siemens PLC

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S,M

In siemens PLC, I want to use power supply in H-system (UR2-H Rack) but I don't know which one (6ES7407-0KR00-0AA0 or 6ES7407-0KA01-0AA0) I should use.
 
its really simple if you want redundancy at power suplly level then use 6ES7407-0KR00-0AA0 otherwise 6ES7407-0KA01-0AA0 but remember you requir 4 6ES7407-0KR00-0AA0 modules (1 & 3 slots on each side)to make your UR2-H reck redundant at power supply for both CPUs otherwise 2 6ES7407-0KA01-0AA0 if feel confusion then [email protected]
 
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