[Andy A.]

As already mentioned, only specific items may be connected to the solenoid breakout board.

It is permissible to combine multiple small 'control system' loads to a single breaker output on the PDB, provided you properly splice the branch circuits together into one set of conductors that terminates in the Wago pairs. So, for example, you could power two separate analog C-Rio modules off the same breaker if you first combine their power leads into one set of positive and negative wires that then connect to the wago ports. This can also be done with custom circuits

The specific rules regarding this can be found in the robot manual. The most related one I can think of is <R38>D, but there are other related rules in the same section. It's worth a careful read because there are some important exceptions regarding this sort of wiring.

It is also permissible to connect multiple solenoids to a single Spike relay, if possible, to reduce both the number of spikes and branch circuits.