Paxton10 Door Controllers are the building blocks of the Paxton10 system. Each one provides control of a single door and a port to allow support up to three Paxton10 connectors for additional functionality. -Mains powered and PCB only options available -Controls a single door and provides additional I/O for general use -Distributed intelligence architecture, no central point of failure -Connector port to cascade up to three Paxton10 connectors -12V lead acid battery back up