MTH Caboose with operating Signal Man

No, no, and no. 

I can imagine an oddball scenario where placing the 6-5906 BEFORE a TIU Variable input might be an issue due to the way a TIU variable channel chops the incoming AC signal.  It would be non-damaging but if this configuration doesn't work, just place the 6-5906 AFTER the TIU Variable output.

If you have an AIU, the 6-5906 is an on-off switch with a handful of diodes.  Wiring an AIU ACC Output to the switch would allow whistle control via the remote.

With your normal DCS setup, what happens when you follow the instructions in the Instruction Manual, "* DCS operation is only possible on DCS Variable Tracks. There are 2 ways to activate the caboose in DCS mode. 1. The first is using the TIU Variable Channel, make sure the DCS signal is turned ON, reduce the voltage to 21 volts and then press and hold the bell button down for 3-5 seconds to activate the caboose signal man."  Refer to your DCS operating manual for instruction. 

Your 18 volts to track will work.

Susan, the only way I can get the signal man to work with the DCS system to with my iPhone controller app is to operate the DCS system in the Conventional mode by selecting a TRACK.  Then it will work, but I'm forced to operate the train in conventional mode.  If I leave the iPhone controller in full DCS when I hit the bell button the PS 3 engine starts the bell and the caboose does nothing.  The instructions also say you need a transformer with a bell button when operating in the DCS mode so I guess that the DC component from the transformer bell button will make it through the TIU and and activate the caboose.  But I have no bell button.  I do have the 6-5906 external bell button, but it comes with a warning (see original post) that I don't understand.  I guess I'll just hook it up and hope it doesn't screw anything up.

Hi noswad, Would you please report on your progress on this?

Thanks

In a similar post I made on the DCS forum Gunrunnerjohn said that the PH135 brick is a full wave transformer and that the TIU should not be damaged buy the DC offset induced by the Sound Button.  I will test in a week or so and post my results here.