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Posted: 1/8/2003 11:17:56 PM EDT
[#1]
Hardwire it directly to the main coming in the panel.
Edit to add: [:D] |
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Posted: 1/8/2003 11:21:28 PM EDT
[#2]
You can use a single 9 Amp power supply to power all nine tubes at once. Just fuse the power lead just in case. 24V at 1 Amp is 24 Watts times 9 tubes = 216 Watts. That's a lot of power.
Notice the shipping on the item. It's a little expensive compared to the price.z |
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Posted: 1/8/2003 11:22:24 PM EDT
[#3]
Thanks 1gun but I stay away from anything with that much power [:)]
If it helps any this is what I am going to be running. [url]http://www.flo-products.com/floprod/smcval0vqbppf.html[/url] [url]http://www.smcusa.com/si/order_pages/VQ-EX120/VQ120-5.pdf[/url] |
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Posted: 1/8/2003 11:24:04 PM EDT
[#4]
Sorry guys, that was my bad. It only draws 1 watt for each valve. So I need a total of 9 watts. I'm sure that makes a huge difference.
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Posted: 1/8/2003 11:27:15 PM EDT
[#5]
Not knowing what your application is. Most soloniods or valves don't really care if the supply voltage is regulated or not. Also unless all 9 valves are actuating at the same time the load will not be as heavy. So if only 1 valve ever turned on at a time then 1 amp supply would be needed. If all 9 are on at the same time all the time that would be the 9amps and running a regulated supply 12 can at 75% max all the time probably won't be enough. If the valves will just pop on intermittantly and not be drawing current all the time a 24v battery supply could handle the surge when the values go with a trickle charger working to re-supply the batteries durring the down time.
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Posted: 1/8/2003 11:35:11 PM EDT
[#6]
Just to make sure I have this correct. It doesn't matter how many amps the power supply has, I just need to make sure there's enough amperage to power all valves and that its at 24v?
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Posted: 1/8/2003 11:58:44 PM EDT
[#7]
O.K.,
That is correct (but not necessarily efficient) Here are some equations: Power = Voltage (V or E) x Current (I) or Power = Current(I) Squared x Load/Resistance (R) Therefore 24volts times 9amps equals 216watts (just as zoom said before me) That is what you're going to need. P.S.- Americans say "Tubes" or "Vacuum Tubes" Brits say "valves" [:D] just thought i'd throw that in there! Reminds me of a joke I heard ..... |
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Posted: 1/9/2003 12:01:25 AM EDT
[#8]
Quoted: Just to make sure I have this correct. It doesn't matter how many amps the power supply has, I just need to make sure there's enough amperage to power all valves and that its at 24v? Yes, you need a 24 Volt power supply. If each valve dissipates 1 Watt of power and you have a total of 9 valves and you may opperate all 9 valves at the same time, then you need a 24V 9W power supply. Power = Voltage * Current (for a dc circuit) So you will only be drawing about 0.090 Amps when all of the valve are opperating at the same time. The power supply in the ebay link will work, but it's overkill. You could get by with a much smaller power supply. |
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Posted: 1/9/2003 12:10:58 AM EDT
[#9]
Ok, I tried to provide a couple of links, but they won't copy here for some reason. I found couple of 24 V power supplies. If you are interested, go here:
[url]www.digikey.com[/url] and type in "power supply" in the search block. Scroll down to power supplies and select "linear" and then refine the search using 24V in the "Voltage Output" parameter (the parameter on the right). Look for the ones around $35. If you want an external power supply, go back to the power supplies list and select "external" There are a couple for about $35 also. Of course, you could probably just build one for a little cheaper. |
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Posted: 1/9/2003 3:07:36 AM EDT
[#10]
It's standard procedure to double the power supply in relation to the load. For example, if your load is going to be 9 watts, get [u]at least[/u] an 18 watt power supply. You don't want to choose a PS that can just barely power the load - it will eventually become a smoke supply.
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Posted: 1/10/2003 12:24:05 AM EDT
[#11]
Thanks for all the help guys. I almost thing I know what I'm doing now. I ended going with this Cherokee supply
[url]http://www.cherokeellc.com/content/specs/data_sheets/cap200_datasheet.pdf[/url] |
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