Quote Originally Posted by Europhyllia View Post
Nice. It worked perfectly on channel 4. I'm happy now.
Karin,

There is a lot of discussions on this topic on the DA support forum. http://www.forum.digitalaquatics.com/viewforum.php?f=16

What I have read about the PC4 is that ports 1 and 4 are relay ports and 2/3 are different ports. Things like dosing pumps should only be ran on 1 and 4 in order for them to turn on/off per your settings. Hope that helps a little.