We have been using lonstation to control our AC's for the past two years. When the system was installed it was also hooked up to several other systems, for instance, lighting, battery chargers, and co sensors to kick on our air exchange fans.

What we have is lonstation talking to two excel15 building managers, and one excel 15 plant controller.

They in turn work some Square D breakers thru IO ports.

The square d breakers should react to input from the building manager, which shows up on my lonstation screen.

I'm lost as to how the building managers/plant controllers signal the square D breakers.

If you know anything about these systems please respond.