Redundant Power SUpply for SLC 500? Sound weird! - PLCS.net

ckchew666 · November 9th, 2004, 10:20 AM

Hi,

I know this sounds weird, but that's exactly what we are looking for. Redundant Power Supply for SLC 500!

Our scenario is that we have bought SLC 500 for one of our proj, but customer revise their tender spec and they need redundant power supply PLC. I know only PLC-5 & CLX has, but is there any way we can run parallel (1747-P3) to act as redundant power supply?

Does anyone out there tried this before?

Thx.

afoley · November 12th, 2004, 04:17 PM

Are you sure they are not asking for a UPS (Uninterptable Power Suppy, I.E. Battery Backup)?

Ken Roach · November 12th, 2004, 04:29 PM

SLC power supplies are meant to run single controller chassis all by themselves. There is no way to use two of them in a redundant configuration.

Even if you were to build a connector to parallel the power inputs, you would have some trouble getting the voltage watchdogs in the CPU to work.

ckchew666 · November 23rd, 2004, 06:48 AM

Quote:

Originally posted by Ken Roach
SLC power supplies are meant to run single controller chassis all by themselves. There is no way to use two of them in a redundant configuration.

Even if you were to build a connector to parallel the power inputs, you would have some trouble getting the voltage watchdogs in the CPU to work.

Ken,

Thx for ur info, I never know there is a voltage watchdog in the SLC CPU, until u notice me

BTW, what's the function of these watchdog doing there? Mind to explain a bit? Thx.

November 9th, 2004, 10:20 AM	#1
ckchew666 Member Join Date: Aug 2003 Location: a Posts: 580	Redundant Power SUpply for SLC 500? Sound weird! Hi, I know this sounds weird, but that's exactly what we are looking for. Redundant Power Supply for SLC 500! Our scenario is that we have bought SLC 500 for one of our proj, but customer revise their tender spec and they need redundant power supply PLC. I know only PLC-5 & CLX has, but is there any way we can run parallel (1747-P3) to act as redundant power supply? Does anyone out there tried this before? Thx.

November 12th, 2004, 04:17 PM	#2
afoley Member Join Date: Jul 2002 Location: Collinsville, VA Posts: 68	Are you sure they are not asking for a UPS (Uninterptable Power Suppy, I.E. Battery Backup)? __________________ Alton As the light changed from red to green to yellow and back to red again, I sat there thinking about life. Was it nothing more than a bunch of honking and yelling? Sometimes it seemed that way.

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November 12th, 2004, 04:29 PM	#3
Ken Roach Lifetime Supporting Member + Moderator Join Date: Apr 2002 Location: Seattle, WA Posts: 8,567	SLC power supplies are meant to run single controller chassis all by themselves. There is no way to use two of them in a redundant configuration. Even if you were to build a connector to parallel the power inputs, you would have some trouble getting the voltage watchdogs in the CPU to work.

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