General > General Discussion
Mean Well 15V 5A
TwinStar:
Alan,
There are. The layout is broken down into power districts. Each district is powered by it's own DB-150. I have a DB-150 (I'll need four eventually) and will have PSX circuit breaks (http://www.dccspecialties.com/products/pdf/man_psx1.pdf) between each booster and each of the four power districts that I'll have on my module set.
I had considered a PS2012 (http://www.digitrax.com/products/power-supplies/ps2012e/) but was just looking for a cheaper way to be DCC compliant and power the rails.
Alan:
If I am reading the DB-150 datasheet correctly, it is not in itself a power supply. There is a separate power supply that provides 12-20VAC or 12-28VDC to the DB-150(s).
What is currently used on your Free-mo setup to provide power to the DB-150s? A single power supply such as PS2012?
TwinStar:
You are correct. The DB-150 merely boosts the DCC signal from the DCS (Digitrax command station). The DB-150 requires a 15V+/- 5-6A power supply. We typically use the PS514 from Digitrax which runs $50-60. DCC is still the standard for Free-mo and it's also cheaper to just install DCC current detectors instead of dual DC/DCC detectors for our signal system. As much as I loathe DCC it isn't going anywhere soon. I have a PC wall brick for testing but it's only putting out 8-9V resulting in a Low Voltage warning.
Alan:
Then there is but a single power supply on the Free-mo setup. In that case a generic 15VDC switch mode power supply should work fine. Depending on how many trains run at the same time and given the number of DB-150s you have then perhaps a little more oomph is called for.
Here is a Mean Well 10A unit for $22.00: https://www.ebay.com/itm/new-Out-of-Box-MEAN-WELL-MW-SP-150-15-150w-15V-10A-SWITCHING-POWER-SUPPLY-w-PFC/222425472352?epid=662498749&hash=item33c9975d60:g:MIoAAOSw3v5YtlXN
TwinStar:
Actually, each DB-150 has it's own power supply which is typically a PS514. These are scattered around the layout with a power supply and booster for each district. One of our module sets is that of Wichita Union Station and it has its own 8a DB-200 power supply and booster. My set is more expansive and I was thinking that 20 amps total would be required. I am buying the DB-150's cheap off ebay and guys buy the upgraded Digitrax boosters. But, these DB-150's don't come with a power supply. If I were to buy a 20 amp power supply how would it 'divide' the power? I'd hate to short 20 amps across the rail.
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