Engineer-Joe posted:Thank you for answering me! Sorry to drag you off course. You know what the wiring is however, I didn't have a clue. I should have researched your profile to see you are in that club. I now get a good idea of what you're doing.
So just one more question to help get you a proper answer from the techs here. Are the TIUs hooked up with chokes?
OK 2 questions, how are the TIUs powered? the relay cuts the track connection and/or power to the TIU?
I have to confess that many years ago I tried passive mode. The signal was weaker and that was a big deal to me. So from then on I did not use it anymore. I never heard of anyone attaching chokes to restore the signal strength back then. There were no version L TIUs back then.
I am tempted to try passive mode again outside on my G scale. I never saw any significant power draw way back when I tried it with one TIU channel. The way you're club is wired, my info wouldn't apply to you here.
Hopefully a tech will bail me out here as I never heard of TIUs wired this way with relays for isolation. I'm tempted to guess at the reasons but it wouldn't help you here and now.
No problem, Thank you, no chokes on the TIUs or transformers, not that I have seen at least. From what I have been reading here we should probably start there. Considering the 12 amp breaker on the Z4000 I imagine the 16amp 22uH chokes mentioned earlier in the thread would be a good idea for starters.
The TIUs are powered by smaller power bricks and those get switched on via a master DCS power relay. Then the main and branch lines each have seperate switches and relays that connect the TIU output channels to the tracks when the club has a DCS day. (The club has issues running DCS and Legacy at the same time so only one system is ever on at once now. That should be a thread of it's own.)
I also do not know the exact reason yet. But I imagine one benefit is that they are subject to derail spikes a third of the time. These design choices were made long before I joined and I haven't asked why yet.
