Microair transponder/encoder wiring question

[rv7charlie]

Has anyone successfully installed a microair T2000SFL-01rev8 transponder combined with their EC2002-01rev3 encoder, using serial connection?

The manual for the xp rev8 at
> http://www.microair.com.au/admin/upl...anual01R80.pdf
shows *2* data lines between the components: encoder pin6data receive to xp pin 5data transmit, and encoder pin 7data transmit to xp pin 4data receive. *But*... note 7 on the hookup page (pg 13) says that the diagram is applicable to revs 5,6, & 7.

I can't find an install manual for the 01rev3 encoder on their web site, but the manual for the 01rev12 shows pin 6 of the encoder (labeled rs232in) as unconnected.

However....

Looking at the page on their pre-wired harnesses at
http://www.microair.com.au/index.asp...6&productID=36

The diagram for wiring their xp to their encoder shows encoder pin 6 (data receive) to be *grounded*.

So, various docs on the Microair website show the encoder pin 6 to be: open, tied to transponder pin 5, and grounded (through the harness) to the case of the transponder.

Anyone have any words of wisdom on the *right* way to do it?

Thanks,

Charlie