The present disclosure describes embodiments of a power-over-ethernet (“POE”) controller and an access control system comprising the same. In an embodiment, the access control system includes a POE controller configured to couple with a Fire Access Control Panel of an automated Fire Detection System. The access control system may further include one or more peripheral devices coupled with the POE controller and configured to be powered with electrical power received via an ethernet port of the POE controller. The peripheral devices may include an access device, a door strike, and a digital output device. Embodiments of a kit containing one or more partially or fully assembled components of the access control system are also described.