When a 18 V Z4000 output (or any other 18VAC transformer feed) is connected directly to a rail and the same rail receives a pair of wire from the fixed output 1 of a Rev L TIU, will the TIU be powered and generate a DCS signal?
In other word, can a rev L TIU be powered and activated to generate a DCS signal at all its 4 outputs by its Fixed 1 output or do you need to power it though its Aux In?
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Do bear in mind that if not powered through AUX port, any break in power to the FIXED 1 loop (if, for example, a derailment causes the breaker to open) will mean you lose control of all trains on the other 3 circuits. Not using AUX 1 is not a good idea.
Yes, that's Passive TIU mode.
When a 18 V Z4000 output (or any other 18VAC transformer feed) is connected directly to a rail and the same rail receives a pair of wire from the fixed output 1 of a Rev L TIU, will the TIU be powered and generate a DCS signal?
In other word, can a rev L TIU be powered and activated to generate a DCS signal at all its 4 outputs by its Fixed 1 output or do you need to power it though its Aux In?
Yes, that's Passive TIU mode.
Interesting. I always thought we needed to power the TIU either via the Aux plug or the Fixed 1 input.
I guess I've been using an 18 VAC wall wart on the Aux plug for no reason?
-Dave
Fixed in and fixed out are connected together. I power the TIU on my modular layout module programming track through Fixed #1, when I turn on the track, the TIU comes up as well.
Thank you very much all for these very precise answers.
This is what I needed.
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