WTIU

Per Mike it can operate in passive mode. That's how I am setting mine up next week.

I don't think there's really a "mode".  You don't program it to do anything different, you just hook it up so the power isn't going through it.  My TIU was hooked up normally and I just moved the wires to operate it passively.

I FIGURED IT OUT!!!!!

Last night I had the idea and I took both the WTIU and my ZWL and instead of using my surge protector, I ran both directly into an outlet and it works now!!

@ArtsModelTrains posted:

I FIGURED IT OUT!!!!!

Last night I had the idea and I took both the WTIU and my ZWL and instead of using my surge protector, I ran both directly into an outlet and it works now!!

Wow, That doesn't make sense how a surge protector could cause this...

Glad you found the resolution!!

@H1000 posted:

Wow, That doesn't make sense how a surge protector could cause this...

Glad you found the resolution!!

My bet is, the ZW-L was not getting the TMCC/Legacy command to turn on track power. That is what makes the most sense given the fix and the initial report.

That's the catch22 in TMCC/legacy- a command is sent but it's one way. You might have been sending the commands and the ZW-L was powered and on- but not raising the track voltage even though you sent the command. TMCC RF signal can have problems based on surge strips and other earth grounding scenarios.

@RandyC posted:

Can a WTIU operate in passive mode? I am waiting for mine to arrive from a dealer.

Yes, it does, and it is working fine on my layout.   Bonus is you don't need to buy a separate power supply like with the old one.  It comes with the power supply which powers the WTIU.

Thanks