Aiphone DA-1AS 1-Call Audio Door Phone Set with Power Supply

Aiphone DA-1AS 1-Call Audio Door Phone Set with Power Supply

Overview

The Aiphone DA-1AS is a complete 1-call audio entrance station set designed for small-to-medium residential and light commercial installations. This system delivers reliable two-way voice communication between a door entrance and tenant station using a straightforward 2-wire topology that simplifies installation and reduces material costs. The DA-1AS includes the DA-1DS entrance station, DA-1MD audio handset tenant station, and PT-1211C power supply, enabling rapid deployment without additional transformers or external door-strike power sourcing.

Key Features

• Complete System Bundle: Includes DA-1DS entrance station, DA-1MD tenant station with handset, and PT-1211C power supply—all components needed for immediate installation.
• Integrated Door Release Control: Door strike is powered directly by the entrance station without requiring a separate transformer; supports 9.5–20V AC door release devices rated 70Ω or higher.
• Full-Duplex Tenant Handset Communication: Tenant station operates via handset for clear, hands-free audio exchanges with visitors at the entrance.
• Hands-Free Door Station Operation: Entrance station provides hands-free calling to tenant units, enabling communication without requiring the visitor to hold handset equipment.
• Backlit Directory: Illuminated directory display on entrance station improves usability in low-light conditions and enhances visitor experience.
• External Device Control: Option button on tenant station allows operation of auxiliary devices such as gate openers, lighting, or camera triggers.
• Call Tone Management: Adjustable call tone volume with mute indicator functionality, reducing false notifications and enabling discreet operation during business hours.
• 2-Wire Installation Architecture: Simplified two-conductor wiring between entrance and tenant stations minimizes labor and material requirements compared to multi-conductor systems.

Specifications & Wiring Requirements

Communication: Full-duplex handset communication from tenant station; hands-free audio at door station entrance unit.

Door Release Power: 9.5–20V AC output, rated for door strikes with 70Ω or higher resistance. Optional EL-12S 12V AC electric door strike compatible.

Entrance-to-Tenant Wiring: 2-conductor overall shield cable (Aiphone #822202) or 2-conductor low-capacitance PE insulation, solid non-shielded cable (Aiphone #871802).

Power Supply-to-Tenant Wiring: 2-conductor low-capacitance PE insulation, solid non-shielded cable (Aiphone #871802).

Distance Ratings (Cumulative):

• Power supply to entrance station or door strike: 360 feet (22 AWG), 1,020 feet (18 AWG)
• Power supply to tenant station: 180 feet (22 AWG), 510 feet (18 AWG)

These distance limitations inform site planning for multi-unit or distributed installations; use 18 AWG conductor for runs exceeding 300 feet to minimize voltage drop and ensure reliable operation.

Integration & Compatibility

The DA-1AS integrates within Aiphone's DA Series product family. Upgrade paths include multi-call entrance stations (DA-2DS 2-call, DA-4DS 4-call) when expansion to larger tenant populations is required. The PT-1211C power supply is rated for 15V AC output and is dimensioned to support the DA-1AS entrance and door-strike circuits. Accessory door strikes such as the EL-12S 12V AC electric strike are field-compatible with proper voltage confirmation.

Package Contents

• DA-1DS 1-Call Audio Door Station (Entrance Unit)
• DA-1MD Audio Handset Tenant Station
• PT-1211C 15V AC Power Supply

Eden Phillips

The Aiphone DA-1AS continues to deliver proven value in entry-level intercom deployments. From a systems integration perspective, this 2-wire architecture remains one of the most cost-effective approaches for single-tenant or small multi-unit retrofits where conduit and wire runs are already partially established. I've used the DA-1AS in residential buildings and small office entries where a visitor management solution is needed without the complexity and expense of video or networked systems.

Technical Highlights:

• Direct Door Strike Power: The entrance station powers the door release directly, eliminating the need for an external transformer and reducing circuit complexity—a significant labor-time savings during rough-in installation.
• Flexible Cabling Options: Support for both shielded and non-shielded low-capacitance wire provides flexibility when working with existing conduit or new runs; distance ratings (up to 1,020 feet on 18 AWG to door strike) accommodate larger building footprints without additional repeaters.

Deployment Considerations:

• Verify door-strike impedance: Strikes rated below 70Ω may not operate reliably with the DA-1DS power output; confirm specifications before final installation.
• Plan tenant station placement within the 180-foot (22 AWG) or 510-foot (18 AWG) power supply distance limits to avoid voltage-drop issues that reduce door-release efficiency.
• The handset-only tenant station suits single-occupant units or dedicated reception areas; for multi-unit buildings requiring simultaneous door and intercom capability, consider a multi-call entrance station paired with additional tenant units.

The DA-1AS remains a solid, field-proven choice for straightforward door-phone applications where simplicity and cost-effectiveness are primary drivers. It pairs well with the optional EL-12S electric strike for installations requiring powered access control, and the backlit directory improves operational efficiency in vestibules or low-light entry areas. Confirm power supply capacity and wiring distances during the proposal phase to avoid installation delays.