Re: powering up a Digitrax system
There's no fixed limit. What one is doing with a PM42 is
subdividing the layout (ignoring for a moment the reversing
feature) to distribute the available current from the booster or
command station. You could, in theory, put 8 PM42 sections on a
single 5 A booster - the question becomes, why do you need so many
subsections to distribute only 5A of current? In my previous
layout, I had four different sections of mainline which were all
fed from one booster. The advantage of a PM42 there is that when
one section shorts, the other three stayed alive. Any two of
those sections could be simultaneously drawing 2.5A, as long as
the other two drew zero; at a different time, the distribution
might be 1.0 A on each of four sections, as an example. It would
depend on train distribution.
In the case of my previous layout, I had 2 PM42 on a DCS100 command station, and 2 on a second DCS100, configured as a booster. However, I was using multiple PM42 sections in each case as reversing circuits, so current distribution wasn't the only thing the PM42s were being used for. Jerry's case may be similar.
It is also possible, I am told, to use one PM42 unit fed from two
boosters, provided one is careful about the wiring to ensure
booster outputs don't get connected together, but I've never done
it. The diagram for that can be seen on page 7 of the version of
the PM42 manual I have.
On 17/06/18 11:38, pacentestern@... [WiringForDCC] wrote:
Hi Jerry Michels, Just wondering how many PM42s that can be connected to one booster? Your comment seems to indicate your RR has 1 command station and 6 boosters with 15 PM42s. I have looked for info about multiple PM42s connected to 1 command station or booster and have missed finding a solution. How is that working out for you and where did you find the info about this?