My Mth Z-4000 is connected to a MTH DCS WI-FI TIU. Loop one is fixed. Loop two is fixed which leaves me with two variable posts on my TIU. My lionel 022 and 027 currently are connected to a separate power source. I plan on connecting my switches to an AIU. My question is this; can I run my switch power through the variable post on my current TIU or should I purchase another TIU for this purpose?
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