- Posts: 8
- Joined: Tue Dec 05, 2017 1:15 pm
The tally outputs on the Blackmagic interface are mechanical relay contact closures to ground (with a maximum of 30V at 1A), so contact is the correct setting on the CCU.
However, there are only 8 outputs so you'll need a second interface if you want tally for more than 8 switcher inputs. You're also limited to program only tally (either for switcher inputs 1-8 or switcher inputs 9-16).
For fully configurable program and preview tally (amongst other things), I'm using Baz Leffler's excellent RMC2ATEM controller.
I made up a simple 8 source program and preview contact closure interface for our Sony CCUs using a couple of cheap as chips relay modules (i.e. like this :-