I have two questions about connecting the DC-16 to my computer running vixen.

1.  Do you use the BS1 serial adapter to connect the DC-16 to the computer, if not how do you accomplish this?
2.  After looking at the output plugin setup for the DC-16 in Vixen, it appears that the channel groups drop downs are to assign addressing for different DC-16 boards.  Is this to support daisy chaining multiple boards (up to 4)?

Thanks

1. No, you must use the Serial Inverter
    -- http://www.efx-tek.com/topics/serial_inverter.html

You don't need to connect a power supply for the DC-16 (you do if using the RC-4)

2. Yes, you can have up to four DC-16s in a chain.