Alarm.com ADC-AC-CARD-50D4 Proximity Access Card

Product Description

The ALARM.COM INCORPORATED ADC-AC-CARD-50D4 is a proximity access control card designed for use in electronic access control systems. This card type is commonly deployed in commercial and residential security installations where keycard entry is required at controlled access points. The ADC-AC-CARD-50D4 carries a composite ISO EV2 4K credential format paired with ATA 557 technology, combining modern card security standards with broad reader compatibility. Security integrators and access control technicians are the primary installers of this credential type.

This proximity card is suited for access control deployments requiring ISO-compliant credentials. The composite construction and EV2 4K encoding make it appropriate for multi-layer security environments where higher-capacity card memory and enhanced encryption are needed. It is sold individually and intended for use within Alarm.com-compatible access control ecosystems. Note that this part has been marked discontinued by the supplier and may have limited availability.

Key Features

• Composite ISO EV2 4K credential format for enhanced card memory and encryption
• ATA 557 technology for broad proximity reader compatibility
• Sold individually as a single card unit
• Proximity card format for contactless access control use

Compatibility

Designed as an OEM-style credential for use in Alarm.com-compatible access control systems that support composite ISO EV2 4K proximity card formats.

Installation Notes

Proximity access cards are programmed and enrolled by a licensed security or access control technician using the access control system's credential management software. Always disable or lock out the relevant access control panel before performing any hardware-level maintenance on readers or door hardware. Card enrollment should follow the system manufacturer's programming procedures. Verify credential format compatibility with existing readers before deploying new cards across a site.