Proximity access control keypads typically receive 12- to 24-volt AC or DC power and connect to an access control panel through Wiegand or Open Supervised Device Protocol (OSDP) wiring, with some models supporting OSDP multi-drop connections. The panel or keypad relay then controls compatible door hardware, while inputs and outputs can support door-position sensors, request-to-exit devices, tamper monitoring, and other security functions.

Many proximity access control keypads support 12 to 24 VAC or VDC with auto-adjusting operation, but installers should verify the voltage and current requirements for the specific unit. Wiring may include power, reader data through OSDP or Wiegand, relay connections for the lock, and optional door-contact, request-to-exit, or tamper inputs, based on the keypad and access control system.

Mullion-mount proximity access control keypads use a narrow housing suited to door frames, narrow stiles, and other space-limited locations, with weather-resistant options for exposed entrances. Single-gang keypads fit standard single-gang mounting locations, making them a practical choice for doors or walls with an existing single-gang box.

When comparing indoor and outdoor proximity access control keypads, review the weather-resistance rating, housing and faceplate construction, mounting style, tamper detection, and keypad lighting, such as backlit keys or illumination for low-light use. Also compare supported credentials, user capacity, power requirements, programmable outputs, and features such as temporary codes, duress codes, and status indicators to match the installation.