Mullion RFID readers can support low-frequency proximity cards, high-frequency smart credentials, or both, depending on the reader’s technology. Mobile-ready versions add Bluetooth-enabled mobile credentials, while some keypad models also allow users to enter a PIN alongside a proximity credential for two-factor access.

For mullion RFID readers, OSDP provides a modern, secure reader-to-controller connection, while Wiegand uses a more traditional one-way interface. Choose based on the access control panel and wiring standard in the installation, with OSDP supporting readers designed for high-security connectivity and Wiegand supporting compatible legacy systems.

Some mullion RFID readers support proximity credentials, high-frequency smart credentials, mobile credentials, or a combination of these technologies. Mullion readers with an integrated keypad can also support PIN entry and two-factor authentication by requiring both a credential and a PIN.

When selecting mullion RFID readers for indoor or outdoor access points, consider the mounting space, environmental exposure, credential technology, and connection method, such as Wiegand or Open Supervised Device Protocol (OSDP). For outdoor or higher-risk locations, look for a ruggedized mullion design, proximity or high-frequency smart credential support, mobile credential capability, and keypad functionality when a PIN or two-factor authentication may support the access policy.