Power Adapter - Output: 9.0V~ 3.34A

CptSternn

Anyone know where I can find a power adapter made for Irish mains that has the following specs:

Output: 9.0V~ 3.34A

Thanks in advance!

CptSternn

Oh and a bit of a techy question too...

If I had a power adapter with these specs:

Class 2 Power Supply
Input: 120V~60Hz 36W
9VAC 700mA


Would it work with a system designed to run with these specs:

Class 2 Power Supply
Input: 120V~60Hz 36W
Output: 9.0V~ 3.34A


I ask because I need this power adapter (one made for Irish mains):

http://www.firststopsecurity.com/product_info.php/899-security-simon-transformer-p-827

But this is the other one here:

http://www.firststopsecurity.com/product_info.php/898-security-simon-transformer-p-1216

And I have found multiple listings on eBay and some other sites that say they are interchangeable. Is that true?

http://www.ebay.ie/itm/ITI-GE-22-155-60-898-Simon-3-XT-Power-Transformer-9VAC-25VA-/290654157103?pt=LH_DefaultDomain_0&hash=item43ac56792f

Would the higher amps not fry it after extended periods of use?

Bruthal

CptSternn wrote: »

Oh and a bit of a techy question too...

If I had a power adapter with these specs:

Class 2 Power Supply
Input: 120V~60Hz 36W
9VAC 700mA


Would it work with a system designed to run with these specs:

Class 2 Power Supply
Input: 120V~60Hz 36W
Output: 9.0V~ 3.34A


I ask because I need this power adapter (one made for Irish mains):

http://www.firststopsecurity.com/product_info.php/899-security-simon-transformer-p-827

But this is the other one here:

http://www.firststopsecurity.com/product_info.php/898-security-simon-transformer-p-1216

And I have found multiple listings on eBay and some other sites that say they are interchangeable. Is that true?

http://www.ebay.ie/itm/ITI-GE-22-155-60-898-Simon-3-XT-Power-Transformer-9VAC-25VA-/290654157103?pt=LH_DefaultDomain_0&hash=item43ac56792f

Would the higher amps not fry it after extended periods of use?

The 9v AC 3.34A power supply will power the item that the 9v AC 700ma power supply was powering, no problem.

The item its powering will still only take the same current from the bigger power supply, as it does from the smaller one, once the voltage out from the bigger one is the same.

So if your original power adaptor was 120v - 9v~, 700ma, then another one of 230v - 9v~ 3.34A will work no problem. As long as the output voltage is actually the same when the load is on them.

CptSternn

robbie7730 wrote: »

The 9v AC 3.34A power supply will power the item that the 9v AC 700ma power supply was powering, no problem.

The item its powering will still only take the same current from the bigger power supply, as it does from the smaller one, once the voltage out from the bigger one is the same.

So if your original power adaptor was 120v - 9v~, 700ma, then another one of 230v - 9v~ 3.34A will work no problem. As long as the output voltage is actually the same when the load is on them.

Ok cool. So they are basically interchangeable then?

Would a 230v - 9v~ 700mA work on a system designed to use a 230v - 9v~ 3.34A?

Bruthal

CptSternn wrote: »

Ok cool. So they are basically interchangeable then?

Would a 230v - 9v~ 700mA work on a system designed to use a 230v - 9v~ 3.34A?

It depends.

A system or item that requires the output of a 3.34A adaptor (power supply) wont work with a 700ma one. For example. if the item/system uses 2A, the 700ma supply wont do it. But a system needing 700ma can be powered from the 3.34A one.

But just because a system/item is using a 3.34A power supply, does not mean it needs that size of power supply. More would need to be known about the specs of the item or system being powered.

As a reference, 700ma = 0.7A compared to the 3.34A which = 3340ma. So you can see one is almost 5 times the other.

Bruthal

The 3.34A power supply means it can deliver 3.34 amps continously at 9v~. So an item powered from it that needs 9v~ @ 1 amp will only take its 1 amp. But the 700ma (0.7A) power supply would be over loaded by the 1 amp item. But the 1 amp item will not be forced to take more than 1 amp by the 3.34 amp power supply, once the voltages are right.

ei9go

the most important question is whether this is a regulated or unregulated power supply.

Lots of the small plug in power supplys are unregulated.

This means that while it may say 9v 700mah, this might be only under load.

The actual voltage without load could be 20V.

If you put a higher capacity unregulated power supply on a piece of equipment than it needs, there may not be enough load to drop the voltage to the required 9v.

Bruthal

True, i mentiond the load-voltage thing in post #3 alright.

As long as the output voltage is actually the same when the load is on them

A 3.34A one should be regulated though. Although it seems its an AC one looked for.

CptSternn

Ok, cool. So if I were looking to get a power supply to replace the one I have then I need to look for something along the lines of 9v ~ 3340mA or something close to it but not over it.

I have a device from America I want to hook up here and don't want to continue using a power converter. It works fine sure, but I was looking to switch the power adapter with one made for Irish mains. Now I know what to look for.

Thanks for that, your posts have been quite helpful.

Bruthal

It wont matter if its over the 3.34A. It wont matter if its a 3 million amps output adaptor. Once its adequate for whatever your powering. So it has to be at least equal to the adaptor output voltage and A or mA of the american one.

As said, some smaller adaptors no load output voltage is higher than required, and the load pulls it down, which wouldnt happen on a higher output adaptor, so its voltage would want to be at the 9v required. Thats why "regulated" was mentioned.

What is it your powering?

DublinDilbert

Can you post a link to the device you want to power and we'll help you spec an adapter. Yea your best to get away from using a 220 -> 110 converter...

CptSternn

DublinDilbert wrote: »

Can you post a link to the device you want to power and we'll help you spec an adapter. Yea your best to get away from using a 220 -> 110 converter...

This is the exact adapter I am trying to replace:

http://www.firststopsecurity.com/product_info.php/899-security-simon-transformer-p-827

This is the unit it connects to:

http://www.safemart.com/Apartment-Security/GE-Security-Simon-XT-Custom-Build-Your-Own-Wireless-Security-System-SIMONXT-CUSTOM.htm

Just the main panel - everything else is powered by button batteries.

I bought one in America for €200 and they sell here for €700, the only difference being the power adapter. They just started selling them here and are being exclusively sold through Eircom Phonewatch, who won't sell me a power adapter (I contacted them sure).

Therefore I have been using a converter but was hoping to replace it with a proper power adapter. The unit itself comes with two bare ended wires which you put into the unit and screw down and then do the same on the power adapter. Not much to it, the problem being finding an adapter that will work and not cause issues.

CptSternn

If I bought something like this, cuts the ends off, and wired it to the panel would it work?

http://www.ebay.ie/itm/NEW-9V-3000mA-3A-AC-DC-Power-ac-adapter-Power-Supply-/230551510881

Bruthal

CptSternn wrote: »

If I bought something like this, cuts the ends off, and wired it to the panel would it work?

http://www.ebay.ie/itm/NEW-9V-3000mA-3A-AC-DC-Power-ac-adapter-Power-Supply-/230551510881

The adaptor you link here is 9v dc out. Its 9v ac you want is it not?

CptSternn

robbie7730 wrote: »

The adaptor you link here is 9v dc out. Its 9v ac you want is it not?

Required transformer: Class II, 9 VAC, 3.34A, 60 Hz

DublinDilbert

I found the install manual:-
http://www.dwgsecurity.com/reference/Manufacturers/GESecurity/Simon_XT_V2_Installation_Guide.pdf

on page 7 it says 25W 9V AC output required.

Something like this should do the job:-
http://radionics.rs-online.com/web/p/toroid-transformers/6718930/

but would need to be wired correctly and contained in a suitable enclosure.

Bruthal

CptSternn wrote: »

Required transformer: Class II, 9 VAC, 3.34A, 60 Hz

The 60hz bit you can ignore. It will be 50 for here.

Bruthal

DublinDilbert wrote: »

I found the install manual:-
http://www.dwgsecurity.com/reference/Manufacturers/GESecurity/Simon_XT_V2_Installation_Guide.pdf

on page 7 it says 25W 9V AC output required.

Something like this should do the job:-
http://radionics.rs-online.com/web/p/toroid-transformers/6718930/

but would need to be wired correctly and contained in a suitable enclosure.

Max secondary current is 1.67 A though. So the 30VA available from the linked traffo would only be at the 18v (both 9v) windings by the look of it.

The panel needs 25 watts, or 25va at parity pf at 9v.

DublinDilbert

robbie7730 wrote: »

Max secondary current is 1.67 A though. So the 30VA available from the linked traffo would only be at the 18v (both 9v) windings by the look of it.

The panel needs 25 watts, or 25va at parity pf at 9v.

That's probably per winding, they could be paralleled up....

Bruthal

DublinDilbert wrote: »

That's probably per winding, they could be paralleled up....

Yea i was just looking at that this second, must see is there a data sheet.

Yea that will work alright.

Bruthal

Yellow to red, and black to orange it looks like, for paralleling. Looks good so.

CptSternn

So anyone know who I could pay to get that done and how much parts and labour would be?

Bruthal

CptSternn wrote: »

So anyone know who I could pay to get that done and how much parts and labour would be?

You would need the transformer dublin dilbert linked to. Then get an enclosure to fit it in an electrical wholesalers, as well as a couple of meters of 3 x 1.5 flex, a stuffing gland for the flex, a 13 amp plug (if its being plugged in), and maybe cut the output 9v lead off the 110v one you have, or they can also be made up. And a small gland for the 9 v lead if you can get one.

Putting it together is straight forward enough. Id do that without any charge, except im in navan.

DublinDilbert

It wouldn't actually be too bad to make up. You could bolt a block connector into the enclosure for joinging up the wires etc... They would need strain relief etc...

Do you know where you want to mount this?

Its not really what I do, but let me know if your stuck...

CptSternn

So total cost for parts? Would it be more than €20?