PCA Series Controllers are programmable controllers that can communicate using BACnet. The PCA2513, PCA3613, and PCA4911 Programmable Controllers offers more advanced features than the other PC Controllers. PCA controllers features an integral real-time clock and support timebased tasks, which together enable these field controllers to monitor and control schedules, calendars, alarms, and trends. PCAs can continue time-based control and monitoring when offline for extended periods of time from a system network. The PCAs include RS-485 field bus networking with BACnet MS/TP protocols.

PCA controllers can be combined with PCX Expansion I/O Modules to gain more I/O interfaces, if needed. PCAs and their advanced features make them well suited for monitoring and controlling a wide range of more complex equipment (such as airhandlers and central plants).

The PCA Series Controllers can also operate as stand-alone controllers in applications that do not require a networked supervisory device or for network applications where it is preferred to have the scheduling, alarming, and/or trending performed locally in the field controllers.

The PCA2513 and PCA3613 are programmable controllers. They are BACnet Application Specific Controllers (B-ASC) with integral MS/TP communications. These controllers run pre-engineered and user-programmed applications and provide the inputs and outputs required to monitor and control a wide variety of HVAC equipment. A PCA2513 or PCA3613 controller combined with the PCX models can be applied to a wide variety of building applications ranging from simple fan coil or heat pump control to advanced central plant management.

The PCA4911 communicates using BACnet/IP communications protocol, and is a BACnet Advanced Application Controller (B-AAC). The PCA4911 controllers operate on BACnet/IP networks and integrate into Johnson Controls and third-party systems.