SDC Security Door Controls CR4 4-Door Control Board

SDC Security Door Controls CR4 4-Door Access Control Board

Overview

The SDC CR4 is a 4-door access control board designed for mid-scale security deployments. It operates on 24VDC and communicates via OSDP protocol, enabling integration with compatible reader ecosystems and management platforms. The controller supports up to 250,000 credentials, making it suitable for multi-building or enterprise facilities requiring centralized access management without large-scale panel infrastructure.

Compatibility

The CR4 integrates with OSDP-compatible readers and access control software. It is appropriate for installation in existing systems that standardize on OSDP communication or as an upgrade path from legacy 4-door solutions. Standard 24VDC power supplies and conventional door strike hardware are compatible.