ProdataKey R4E Red Four-Door Expansion Board

Expand capacity and strengthen site security with the ProdataKey R4E Red four-door expansion board — a compact door expansion module designed for busy enterprise and multi-site installations. The R4E lets you extend an existing ProdataKey Red Max controller to manage up to four additional doors, giving you scalable access control without costly controller replacements. Built-in OSDP and Wiegand protocol support delivers interoperable reader connectivity and secure, tamper-resistant communication for better surveillance and monitoring. Its self-discoverable, plug‑and‑play architecture speeds deployment and reduces installation costs, while fully supervised telemetry and battery statistics provide actionable diagnostics to minimize downtime. Ideal for office campuses, healthcare facilities, and retail environments, the R4E combines ease of integration with enterprise-grade reliability. Add the ProdataKey R4E to your access control infrastructure to increase door capacity and enhance security operations — contact sales or order today to start expanding your system.

• Scale access control quickly: add management for up to four additional doors without replacing your core controller.
• Seamless integration: native OSDP and Wiegand support ensures reliable, secure communication with readers and controllers.
• Faster installations: self-discoverable, plug‑and‑play design reduces onsite labor and deployment time.
• Proactive system health: fully supervised connectivity and battery statistics improve monitoring and reduce downtime.
• Enterprise-ready reliability: made in the US and built to integrate with ProdataKey Red Max systems for consistent performance.