Those 2 powerbars and the dosing pump can be daisy chained. The setup process for these legacy devices is very different from the current PAB devices and therefore have more steps involved. Follow these steps closely and you'll be connected in a few minutes.
Here's how to get those connected:
1. Connect to your controller and go to the Switch channel settings page
2. At the bottom of the page, enable Digital powerbar connected on S1-S4 (outputs 1 - 24) and save settings
3. Connect the first powerbar to the S1-S4 port
4. Select Program digital powerbar...
5. Select Numbering of digital powerbar
6. Set the numbering to start at 1 and click NEXT
7. Select Program now
Now that the first PB is programmed, disconnect this from the S1-S4 port and connect the second PB. Repeat steps 4 - 7, this time making sure you set the starting socket number to 7.
After the 2nd PB is programmed, connect the doser to the S1-S4 port. Select Program digital powerbar, select Numbering of dosing pump station and set the starting number to 13 and select Program now.
Once the above is done, go ahead and connect the first PB to the S1-S4 port, then connect the 2nd PB to one of the ports on the 1st PB. Connect the doser to the 2nd PB.
You will now have these powerbars controllable on sockets 1-12.
Go back to the Switch channels page and select Socket 13...set this to Dosing pump 1
Go to socket 14...set to Dosing pump 2
Go to socket 15...set to Dosing pump 3
Go to socket 16...set to Dosing pump 4
Save settings.
You can now go to the dosing pump settings page for each dosing pump and create your schedule.