RailPro > RailPro Specific Help & Discussion
Keep Alive installation w/ Railpro
Alan:
Your low voltage indication is no doubt the result of passing the track voltage through 3 additional diodes (one each direction in the bridge rectifier and another in the KA discharge line). Each diode drops 0.7V. Whatever your power supply voltage is, you can subtract 2.1V to arrive at what is actually getting to the module now.
Recall earlier I commented that an argument could be made if a KA is in one loco then it should be in all? You are experiencing why.
William Brillinger:
--- Quote ---Recall earlier I commented that an argument could be made if a KA is in one loco then it should be in all
--- End quote ---
Yup. And I will be adding them to my entire fleet for sure.
At which point I may look at increasing my track voltage by 2V.
Alan:
Beware. Once you raise the track voltage then it may become dangerous to run a non-KA loco as you will be right at the upper limit of acceptable LM voltage. Your layout effectively becomes mandatory KA for any visiting railroaders.
You will have to put this on your train room door! ;D ;D ;D
William Brillinger:
sigh. :-\
Thanks Alan, The voice of reality strikes again.
William Brillinger:
I got out my meter, and I read 14.28V on my rails, both at the nearest point to the PWR-56 and also at the furthest reaches.
The LM-2S manual says the MAX is 18V.
If I would increase the voltage to ~16V it should be fine and should eliminate the warning condition.
The question is this: Where would I find a 16V DC PSU that is appropriate for the Job.
I wonder if there is an appropriate 1.5 or 2V step-up converter?
On the downside, the KA3 is rated for 12 to 16V input. That might be cutting it close.
**Actually it should be fine, since the KA3 is on the lower voltage side of Diodes.
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