Opus 80W.. a few questions

**sebberry** · 02-24-2007, 04:20 PM

Hey guys,

Just have a few questions regarding the Opus 80W PSU that I have. The manual for it is here: http://www.opussolutions.com/pdfs/DC...ck%20Guide.pdf

1) First page of the manual says that the operating modes are determined within 3 seconds of initial power-on. Does this mean that once I select a mode and turn it on for the first time, this is set permanently, or can it be changed later on?

2) Input connector:

Why are there two inputs for GND and +BAT? Is it safe to say that I can twist the two GND leads together and the two +BAT leads together? Seems excessive...

3) JU1 – Sht-Dwn Dly, Stnd-by Power mode and Sht-dwn / Strt-up voltage Jumpers:

This section couldn't be any less clear than mud. There are 10 pins but they only numbered 1-5. It would make much more sense if they were numbered 1-10 and then stated which pair to short. Looking at that juper block, lets say that the top row of ins is A-E. I assume for a 10 second shutdown delay I would leave the jumper off?

Startup and shutdown voltage select: What the hell is startup voltage? I assume shut-down voltage is a battery drain prevention feature that shuts the computer down when the voltage drops below a certain level, but startup voltage makes no sense to me. Also, it says there is a factory installed jumper on pins 5-E, which on my board is missing. Should I install a jumper there?

4) J7 - power switch connector:

I assume that this is like the front button on an ATX computer? Does the Opus momentarily short this connector to turn on and off the computer?

5) J6 - PS-ON* signal and Stand-by Power connector:

It doesn't really say what to do with this...???

Sorry for all the questions and thank you for the answers. If they just wrote the manual for idiots like me in a step-by-step fashion, I wouldn't ahve to post this here

**DarquePervert** · 02-24-2007, 06:07 PM

1) The mode that the PSU is in is determined within 3sec of powering up. In other words, the logic routine for the PSU runs through it's course within 3sec.

2) Use two wires of a higher gage to allow for more current. I agree that this is pretty silly.

3) Too many questions for this number!

you have to jumper positions. Using the chart in the manual, you determine where to put jumpers for different lengths of time. you're correct that you leave the jumpers off got a delay of 10sec.
Startup voltage is how much voltage needs to be on teh ACC line in order for the Opus to initiate startup. If the ACC line supplies less than the set voltage, it won't power on the PC.
And I can't look in the manual to see what it says about the shutdown delay,

4) That is correct. It connects to the motherboard power switch header.

**sebberry** · 02-25-2007, 03:59 PM

Originally Posted by DarquePervert

1) The mode that the PSU is in is determined within 3sec of powering up. In other words, the logic routine for the PSU runs through it's course within 3sec.

2) Use two wires of a higher gage to allow for more current. I agree that this is pretty silly.

3) Too many questions for this number!

you have to jumper positions. Using the chart in the manual, you determine where to put jumpers for different lengths of time. you're correct that you leave the jumpers off got a delay of 10sec.
Startup voltage is how much voltage needs to be on teh ACC line in order for the Opus to initiate startup. If the ACC line supplies less than the set voltage, it won't power on the PC.
And I can't look in the manual to see what it says about the shutdown delay,

4) That is correct. It connects to the motherboard power switch header.

Thanks, that helps a lot!

About number 2, I have actually ordered some new crimp terminals so that I don't have to hack up what came with the PSU or splice the existing wires... should I get some crimps for thicker wire if I will run directly from the battery to the PSU?