All AI-Net tuner modules have a pass through port.
If you want to connect up a tuner module and one other AI-Net device (KCA-420i, CHA-S634 etc.) then you
DO NOT require an AI-Net switch.
If you want to connect up more than one other AI-Net device then you
DO require an AI-Net switch.
The tuner module must always be located between the Intravee and any other AI-Net device(s). The 'Output' port on the tuner module should be connected to the Intravee and the other device(s) should be connected to the 'Input' port.
For example, to connect a tuner and KCA-420i iPod interface you would connect them like this (a CD Changer could be used in place of the KCA-420i if you would like) :

To connect a tuner, KCA-410c AI-Net switch, KCA-420i iPod interface and CHA-S634 CD Changer you would connect them up like this :

All AI-Net tuner modules supported by the Intravee (TUA-T100DAB, TUA-T500HD, TUA-T550HD, SIRALP-1, TUA-T020XM) connect in the same way.
All AI-Net switch modules supported by the Intravee (KCA-400c, KCA-410c and Intravee switch) connect up in the same way.
All AI-Net tuners also have a power connection, the power supply should be unswitched and this should be connected before connecting the AI-Net cable between the Intravee and tuner module.