Metasys (Johnson Controls)

Metasys is a building automation system from Johnson Controls used in commercial, healthcare, education, and government buildings. Field controllers, network engines, and server software provide schedules, alarms, trends, and graphics, and BACnet is the usual route for integrating third-party equipment.

For product makers, Metasys usually appears as the customer's existing system: a new device is integrated by the site's controls contractor, typically over BACnet, and its points must be mapped into the site's naming and graphics conventions.

Where it bites: engineering tools, licenses, and training generally run through the vendor and its authorized partners, so a hardware company often cannot configure the system itself, and timelines depend on the contractor. Clear point lists, a well-behaved BACnet implementation, and commissioning support make integrations go faster.