1. Temporarily disconnect the PB6 from the S1-S4 port on the ProfiLux
2. Connect the Gen 1 doser to this S1-S4 port
3. Connect to the ProfiLux, go to the Switch channels page and select Program digital powerbar or dosing unit
4. Follow on-screen steps and set this pump to begin at 7 (Assuming you only have 1x PB which is already using sockets 1-6)
5. Disconnect Gen 1 doser from S1-S4 port, reconnect the PB to this same port
6. Connect the Gen 1 doser to one of the RJ12 ports on the PB.

The dosing pump will now react to switch channels 7-10.
1. Select Switch ch. 7 and set the function to Dosing pump 1

Sw.ch 8 --- Dosing pump 2
Sw.ch 9 --- Dosing pump 3
Sw.ch 10 --- Dosing pump 4

You can then setup your dosing schedules by following the steps here:
https://www.aquariumcomputer.com/kno...pump-schedule/