4500 and 6500 power supply related questions

[gautamzone]

Dear friends,

I have a 4510-R-E switch with two 4200W power supplies operating in redundant mode.

Each 4200W power supply has two AC inputs.

Looking at the docs, i see that "each power supply operates at 50% capacity and provides

the same total power as a single power supply – if one fails, the backup reverts to

providing 100% power".

So, if i have two power sources viz. UPS A and UPS B. How should i connect power to the switches?

1. Power Supply 1

AC Input 1 - UPS A

AC Input 2 - UPS B

2. Power Supply 2

AC Input 1 - UPS A

AC Input 2 - UPS B

(OR)

1. Power Supply 1

AC Input 1 - UPS A

AC Input 2 - UPS A

2. Power Supply 2

AC Input 1 - UPS B

AC Input 2 - UPS B

Also for the 6500 with 6000W (2 AC inputs) , can you tell me if i should connect the same way?

I know that power supply failure will not be a problem. My concern is that if UPS A fails, then the power supplies should still continue to run at their rated capacity and not at half the capacity.

Thanks a lot

Gautam

[Reza Sharifi]

Hi Gautam,

We use 6500 with 6000W power supply and connect them just like your 1st option.  It works well.

HTH

Reza

[gautamzone]

Dear Reza,

Thanks a lot. So you mean that you connect the AC inputs of each power supply to different sources and it works fine for you

[Reza Sharifi]

Yes, each inputs of each power supply to different power sources

HTH

Reza

[gautamzone]

Thanks a lot Reza. What about 4500? Should we follow the same approach for 4500 as for the 6500.

[Reza Sharifi · Accepted solution]

Gautam,

I would do the same for 4500 if you have multiple outputs for each power supply.

Good Luck

Reza