Bachmann Message Board

Discussion Boards => On30 => Topic started by: grsman on April 20, 2018, 09:54:41 AM

Title: Max Voltage
Post by: grsman on April 20, 2018, 09:54:41 AM
What would be the maximum DC/DCC power supply voltage for On30?
I would like to use L-Ion battery power for my DCC. I could use 11.1volt
battery, but I think that is a little low!? 14.8volt battery would be better,
but I afraid the charged value would be too high.? NiCAD or NiMH could
provide 12volts which would be great, but the size would be prohibitive.

Title: Re: Max Voltage
Post by: Geoff12765 on April 29, 2018, 12:23:56 PM
I'm not an expert, but if it helps, my Bachmann Spectrum controller for DC models, that came with my On30 starter set, has a maximum output of 15 volts DC.

The NMRA standard for DCC (standard S-9.1) says that " Digital Decoders intended for scales larger than "N" shall be designed to withstand a DC voltage of at least 27 volts as measured at the track".

You could also try doing a web search for DC and DCC controllers and see what their outputs are.

Title: Re: Max Voltage
Post by: Hunt on April 29, 2018, 03:42:31 PM
Using  14.8 volts is OK.
To date an On30 locomotive with a  factory installed sound decoder provided by SoundTraxx  --
  • An over voltage protection will automatically shut off motor control and sound when voltage exceeds 18 to 21 volts depending  on the decoder model. 
  • Absolute maximum voltage input is 27 volts.  Voltages exceeding 27 volts may cause permanent damage to the decoder even when over voltage protection is activated.

Title: Re: Max Voltage
Post by: Kevin Strong on April 30, 2018, 01:09:46 AM
You'll be perfectly fine using 14.8 volts. That having been said, I use 11.1 volts in all of my On30 stuff, and am not wanting for speed at all. If you need a bit more, but space is an issue, use a step-up voltage regulator. Pololu sells a variable one that will go up to 24 volts.



Title: Re: Max Voltage
Post by: grsman on April 30, 2018, 10:09:59 PM
I tried a 14.8V battery today and it seemed to work OK.
I don't think my Revolution DCC receiver/booster really likes 11.1 V.
I am more concerned about equipment that may use the DCC track
output directly for lighting and other things and not using the decoder.
I think all will be OK.

Title: Re: Max Voltage
Post by: 2foot6 on May 05, 2018, 06:59:49 AM
I have found out the hard way that a number of American made and branded decoders do not like 18-20 volts at all,they are not meeting the NMRA standards.Many of them  have leaked smoke and stopped working.My system has 20 volts at the rails ,so as a precautionary move I now only use the better quality brands at a higher price(Tsunami,ESU and Soundtrax)The higher priced decoders give a much better sound and response in operation and don't smoke.........................Peter