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Offline cwp_marklin  
#1 Posted : 02 March 2015 21:29:07(UTC)
cwp_marklin

United States   
Joined: 26/07/2011(UTC)
Posts: 73
Location: Portland, Oregon
I am currently in the midst of building a layout which I will operate via a Central Station 2 (60215). For a while the only power supply that was available from Marklin was the 60055, so I purchased one last year. Marklin recently replaced the 60055 with the 60065. If I understand correctly, the 60055 is a 60VA transformer (AC output) and the 60065 is a 50VA transformer (DC ouptut, with AC also if you use the converter, and a "switched mode"). Is there any reason I should trade-in my 60055 for the newer 60065? The switched mode sounds appealing. Any input would be greatly appreciated. Thanks, Chris
Offline H0  
#2 Posted : 02 March 2015 21:42:26(UTC)
H0


Joined: 16/02/2004(UTC)
Posts: 15,254
Location: DE-NW
The 60065 is a switching-mode power supply, not a transformer and it has a stabilized output voltage.
IMHO power supplies with stabilized output are much better than transformers.
The 60065 was announced in the 2012 new items brochure.

Since you already have the transformer, you can begin with that.
If you get a 60065 later on, you can still use the 60055 to feed accessories.
Regards
Tom
---
"In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS
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Offline cwp_marklin  
#3 Posted : 02 March 2015 22:01:47(UTC)
cwp_marklin

United States   
Joined: 26/07/2011(UTC)
Posts: 73
Location: Portland, Oregon
Tom, thanks for the reply, now I understand the differences between 60055 and 60065. My Marklin dealer has a deal on the 60065 right now, so I think I am going to buy one.
Offline clapcott  
#4 Posted : 03 March 2015 01:55:29(UTC)
clapcott

New Zealand   
Joined: 12/12/2005(UTC)
Posts: 2,433
Location: Wellington, New_Zealand
Originally Posted by: cwp_marklin Go to Quoted Post
.... Is there any reason I should trade-in my 60055 for the newer 60065?


Chris,

If the power (VA) rating of the two were comparable, there may be a "voltage under load" benefit in using the stabilized power supply.
For example the 60052(240V version of the 60055) will have an output voltage range starting at 24V dropping towards 16V whereas the power supply will be a more stable 19V dropping to about 18.5.

Some decoders will exhibit a "sound cutout" if the voltage drops too far below 19V. Other decoders, like the 60760 may start to exhibit random reversing.
So for some aspects Voltage is important even if power is theoretically available.

Your 60055(16V/60VA) would have an output voltage only slightly lower than the 60065(19V/50VA) at the point it reached its 50VA limit. Therefore, in your case this aspect may seem moot.

However, overseeing all this is the CS2s setting of the power supply type - this should match what is actually used. It is this setting that will cause a "soft cutout" of the CS2 before the power supply trips/dies.
Because there is no value available, in the CS2s setting option, for the 60065 - the closest match is the 60061 (a 60VA PS) - the CS2 will allow the 60065 to over extend itself towards the 60VA mark before it intervenes. That said, my observation is that the cutout was closer to 57VA even with a 60061. This may indicate that Marklin have configured the setting with the 60065 in mind.

I have no way of testing the 60065 but a 60061 appeared to have a design tolerance, to maintain its voltage, of about 25%. (Long term heat/stress not able to be assessed). On this basis, the observed CS2 cutout (57VA) would mean a 14% overrating of the 60065 but it would not have reached the point of voltage drop-off.

Disclaimer.
As with any power assessment other factors will have their impact to varying degrees and I cannot test/assess them all.
Peter
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