Black. The ACTpro 1520 is a single door IP controller expandable up to 32-doors via ACTpro door stations and supports 15,000 users . It can be set-up and administered via its built-in web server or through the established ACTWin software application. Key features include voltage monitoring, break glass monitoring, status LEDs for fault indication and cable management improvements such as a raised PCB and more space in the enclosure. The ACTpro 1520 comes complete with a power supply (PSU) unit.. ACTpro 1500 is a single door IP controller which can be expanded to 32 doors with ACTpro 100e door stations. ACTpro 1500 Controller is not interoperable with other ACTpro controllers. ACTpro 1500 controller includes a web server which allows installers and users to manage installations without requiring ACTWin software. If using more than one 1500 controller ACTWin software is required