The HikCentral-ACS-1Door from Hikvision is an additional 1 door, manageable, HikCentral v1.2.
HikCentral is a Central Management System (CMS) designed for managing distributed sites or large groupings of cameras recording on Hikvision NVRs, DVRs, and CVRs. HikCentral is pre-loaded on a Windows-based server (optional).