The PPCU2 is a boxed 2 door networkable access control system with windows based PC programming and management software (PROS CS) with support for up to 15,000 users. The 2 door controller is housed in a lockable cabinet with a 13.8VDC, 3.5A power supply with battery back up facility and includes a TCP/IP connection allowing multiple controllers to be connected to a network. An RS485 connection is included on the controller which can link additional controllers to the same Ethernet connection.