Micrologix, PLC-5's, and SLC-100's can be used anywhere there is an appropriate power source.
The SLC 100/150 is no longer manufactured, nor has it been for years, so is is poor choice for new installations (even if appropriate power is available).
Actually you can use all three on them in conjunction to make an impressive waste disposal system
Micrologix 1000 - Turn ventilation fan on and off as needed to evacuate fumes while saving electricity
SLC100 - Automatically dispense toilet paper 2 sheets at a time. If you are very careful you can position the two sheet in the precise location and wipe without getting anything on you. This will again save you money
PLC5 - Now this controller has alot more capablity than the other two. Use it two flush the toilet, raise the blinds to let the sunlight in, and turn on the water to the sink to remind the user to wash afterwards.