Recommended PDU for 6850 & 2850

Question

I am currently looking for a recommended PDU (power distribution unit) for my dell rack.  Here is my situation:   I have several PowerEdge 6850s and the PowerEdge 2850s in a dell rack.  The 6850s are 200 - 240v while the 2850s are the regular 120v.   What PDU would I use for my rack so that I can plug all servers in?  Thanks for the help.

Bezalel · Answer

The 2850 can use 84 - 264 volts so unless you have additional equipment you only need to have a 220 volt PDU.

Bezalel · Answer

How many of each model do you have?

emize55 · Answer

So, could I use something like this:     or:       thanks.

emize55 · Answer

In other words, which PDUs will work with the 6850 that dell sells on this page:

http://accessories.us.dell.com/sna/productlisting.aspx?c=us&l=en&cs=04&category_id=6251&first=true

And can I plug the 2850 into the same pdu?

Thanks.

Bezalel · Answer

For a 6850 running at 220 or 208 volts you need a PDU capable of providing 14 amps and 2 IEC-C13 outlets. If you want to add a 2850 and are using single phase power (220 volts) you will need a 20 amp PDU and an additional 2 IEC-C13 outlets. (You can also use IEC-C19 outlets but will need an adapter cord to convert to IEC-C13.) If you have triple phase power (208 volts) you will need 21 amps. (You may be able to use lower rated PDUs but will have to determine how much power your servers actually use under a full load.)   How will you be providing power to the PDU?

Rack_Guy · Answer

Hello,

If you can give me an exact count for the number of PE6850's and PE2850's you have exactly in that rack (as well as any other units you might be powering in that rack), I can work at getting you a PDU setup.

Regards,

The Dell Rack Team

Anrgy_Kreyon · Answer

Can anyone tell me what I need to do to make the following senario work.

Have a Fresh 2200rmxl tnet UPS from APC.

a 1T890 PDU - (13 outputs)

and a New Poweredge 2850 Server which also has a powervault 220s and a powervault 114t connected to it (the server that is).

Now My Question is this: how can I know if the PDU I have is compatible with the L6-20 output plug (voltage wise) ? the input n the PDU says 16A-240Vac and only the 2 rear outputs have any writing on them which says "10a 250v" and the front 11 outputs are unmarked. So Do I assume that this is a 120v only PDU? I spoke to a dell technitian who said that the front was 110v and the back was 240v, but the document that he sent to me did not show My Model number PDU and the ones it did show did not apear to be dual voltage unless they have differnt types of plugs. so wil this PDU work with my system? or do I need another PDU to interface correctly?

I read in another forum that someone said that the 2850 could handle 60 to 260v input, but this seams far fetched, is it true? and is there something I have to do to the server to make it accept different voltages?

the basic problem is there are only 2-110v outputs on the UPS unit and we do not want to overload them so we need to use the L6-20 output or the L6-30 outputs (there are 2 of them) the L6-20 seems to be the easiest to match up so I am looking at it for now. but I need to make sure I will not blow up or otherwise destroy the brand new server when we hook it up.

Bezalel · Answer

The voltage range of a 2850 is 84-264 volts, There are 2 power supplys that require up to 700w each.

The voltage range of a 220S is 100-240 volts, There are 2 power supply that requires up to 600w each.

I couldn't find information on the 114t but your server and drive enclosure may need up to 2600 watts and an SU2200RMXLTNET is only rated for 1600 watts. If you can keep your power draw under 1600 watts (its very likely but I had to warn you) you should be able to use your 1T890 PDU. This PDU has an IEC-320 C20 input and IEC-320 C13 outlets. IEC-320 connectors are for use on devices that can be powered by 110 or 220 volt current. If your PDU was rated for only 110 volts it would have a NEMA type connector.

You will need a NEMA L6-20P to IEC-320 C19 cable to connect your PDU to your UPS

You will need a IEC-320 C14 to IEC-320 C13 cable for each power supply you connect to the PDU

Bezalel · Answer

A PDU will distribute the same voltage it gets from the UPS. It could be 110, 120, 208, 220, or 227 volts. All outlets on a PDU will be the same voltage.   If you connect the PDU to a L6-20R outlet on your UPS you will get 208 volts. If you connect the PDU to a 5-15R outlet on your UPS you will get 110 volts. (The 5-15R outlets on your UPS are only rated at 400VA so don't expect to put a heavy load on them.)   Look at the power rating label of each peice of equiptment you plug in. If you see the voltage listed as 1 continuous range such as 100-240V then you do not have to do anything when changing the voltage (most server equiptment will be of this style because there is no standard voltage for data centers). If you see 2 ranges such as 100-120V and 200-240V you will need to set a switch on the power supply (most PC equiptment will be this style because it is cheaper to manufacture and voltages are standard for consumers). Message Edited by Bezalel on 12-20-2005 10:58 PM

Anrgy_Kreyon · Answer

Bezalel  Thanks for the Input! I have the cable ordered for morning delivery, and will update when I have wired it all up. the dell rep said that it shoudl be no problem for the load but he did not seem as sure about the voltage abilities of the equipment I was mentioning. And am I understanding you right that the 2 outputs on the back side of the unit are the only 2 capable of 240v output?  so I can use the front 11 outputs as 120v ? is there something I need to do on the server and it's respective parts to accept the different inputs?

Anrgy_Kreyon · Answer

You Rock! Thanks For the Info! I believe this will be no problem now. You have been the most helpful person I have talked to so far and I appreciate your Time!  I will let you know tomorrow how it goes.

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Recommended PDU for 6850 & 2850

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