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Re: Module scenery power


 

Mark, way over thinking. This is not a absolute, just exemplatory guide, written many many years ago, things change over time. Seriously, just connect to the Acc bus and enjoy. You will never reach the common overall power limit. Besides, at any given set up, no one has the power supply ! So, just supply your own. We can always take the 2 wires off your module and put a $5 switching supply on it. Especially when you need 16 volts. Why search or build some obscure converter when you can just buy a $10 120VAC line powered supply for it? That 16v supply can also *easily* supply the 12 or other DC volts with 50c parts.


Jeff M
SF Bay Area Z

-----Original Message-----
From: "mark2playz" <mark.markham@...>
Sender: Z-Bend_Track@...
Date: Tue, 31 Jul 2012 07:01:10
To: <Z-Bend_Track@...>
Reply-To: Z-Bend_Track@...
Subject: [Z-Bend_Track] Re: Module scenery power


Jeff, Don:
Thanks for the input; it sent me back to the ZBT document to make sure I understood it. Having done so I think my questions are more along the lines of what the document says vs. how it's used.
Referring back to pages 27 & 28, it seems that the 12V line is not continuous but interrupted at least every 9th module with a 3A "buffer". I read "buffer" as a tracking supply that senses the accessory line from the left and drives that voltage at full power on the right. My take on this is that for my high power module(s) I would connect a 12V feed adapter on each end and drive DC-DC converters on module for specific voltages.
Continuing on to the emergency shutdown, the spec does not specify the shutdown apply to the 12V, only the tracks. So the response to "I smell smoke" is press shutdown, then run around the layout turning off the 12V. Using tracking supplies allows a central shutdown. Also can you point me in the direction of a shutdown circuit?
So, how far off am I from what you guys actually do?
Mark



--- In Z-Bend_Track@..., Don Fedjur <donfedjur@...> wrote:

Mark,

Use a switching power supply. Rated 12V and minimum 750 MA per. These are high quality, constant output, perfect for LED. $3.00 each in quantities of 10 at;
You can put one onto each module or at least your lighted modules. Maybe you just want to create a simple 12 volt buss to go from one module to the next. Use the Z-Bend standard and incorporate into the master wiring harness. You can even use a temporary power feed to connect into the harness with a 25 pin intermediate connector designated to simply tap into only the accessory feed. Me personally, I like a dedicated buss to tie into from module to module. Choose a larger power supply if you want to go a greater distance or say up to 2-3 amps.

Hope this helps you out.


Don Fedjur



-----Original Message-----
From: mark2playz <mark.markham@...>
To: Z-Bend_Track <Z-Bend_Track@...>
Sent: Mon, Jul 23, 2012 5:42 pm
Subject: [Z-Bend_Track] Module scenery power





Hi,
I'm working on a new layout using the Z-Bend Track spec. I'm to the point of working on the electrical design. I find myself unsure about the 12VDC scenery power.
Spec allows 300mA per module. If I need more than that I need a "power booster" (as also specified for the 9th module). What is the power booster?
If one needs more than 12V (such as for the 16V Viessmann 4551 slow motion unit) do you use a DC-DC converter or just wall wart?
Thanks,
Mark









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