Title: Hardware Installation Guide.pdf
The ISC can communicate upstream at 38.4 Kbps via RS-232, RS-485 multi-dropped configurations, modem dial-up communications, Ethernet TCP/IP networks, or Token Ring networks. The standard ISC can store 5,000 cardholders and 100,000 events, with expansion capabilities for up to 250,000 cardholders and 1 million events. The ISC has four downstream 2-wire RS-485 channels or two 4-wire RS-485 channels. In either configuration you may connect up to 64 readers or 32 devices on a single Intelligent System Controller. Each SRI, DRI, ICM and OCM takes up one device address.13.1InterfacesThe ISC interfaces upstream with the Access Control software on a host system, and downstream with the following field hardware components:Intelligent System Controller Communications OverviewAccess Control SystemCommunications from Host to Controller RS-232, RS-485, Ethernet Dial-up, Fiber, etc...32 Downstream Devices TotalRS-485 Multi-drop 2 or 4 wireIntelligent System Controller