NEC Express 5800 - Page 106

Hardware
106
Below shows the samples of redundant configuration.
1) N+1 redundant configuration
Power Supply 1 Power Supply 2
N+1 Redundant
PSU1 PSU2 PSU3 PSU4
Note
N=1 2 PSUs Used Used *1
N=2 3 PSUs Used Used Used *2
N=3 4 PSUs Used Used Used Used *3
PSU: Power Supply Unit
*1 : Operation can be continued even if PSU1 fails or Power Supply1 has outage.
Operation can be continued even if PSU3 fails or Power Supply2 has outage.
*2 : Operation can be continued even if PSU1 fails, PSU2 fails,PSU3 fails or Power Supply2 has
outage.
*3 : Operation can be continued even if PSU1 fails, PSU2 fails,PSU3 fails or PSU4 fails.
2) 2N redundant configuration
Power Supply 1 Power Supply 2
2N Redundant
PSU1 PSU2 PSU3 PSU4
Note
N=1 2 PSUs Used Used *4
N=2 4 PSUs Used Used Used Used *5
*4: Operation can be continued even if PSU1 fails or Power Supply1 has outage.
Operation can be continued even if PSU3 fails or Power Supply2 has outage.
*5 : Operation can be continued even if PSU1 fails,PSU2 fails or Power Supply1 has outage.
Operation can be continued even if PSU3 fails,PSU4 fails or Power Supply2 has outage.