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Fuses in a DCS environment should always be in the Hot wire between the transformer and each TIU channel input (red post).


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I agree with Barry as to location.  I also recommend a manual reset circuit breaker rather than a fuse.  It's cheaper in the long run.

I assume, David, that you are only using terminal 1 on the ZW. 

If it doesn't blow in normal operation, I would recommend dropping to a 7 or even a 5-amp fuse or breaker, for quicker popping upon a derailment.

I power all 4 terminals of the TIU, and use auto fuses between the transformers and TIU.  Though I seldom blow a fuse, this set-up has worked well for me.  I know some people recommend more exotic fuses but these work OK.  I like to change out the fuses depending on how many amps the particular locomotive/car combination draw on the track at the time.  So sometimes a 7.5 amp, while other times 3 amps is plenty.  With auto fuses this is simple to do.

I also run a TVS between the transformers and TIU on each of the 4 channels.

I also run a TVS between the transformers and TIU on each of the 4 channels.

FYI, every TIU ever made has a TVS built-in for each channel.

DCS Book CoverThis and a whole lot more about DCS is all in MTH’s “The DCS Companion 3rd Edition!"

This book is available from many fine OGR advertisers and forum sponsors, or as an eBook or a printed book at MTH's web store!

DCS Book CoverThis and a whole lot more about DCS WiFi is all in MTH’s “The DCS WiFi Companion 1st Edition!"

This book is available from many fine OGR advertisers and forum sponsors, or as an eBook or a printed book at MTH's web store!

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