Aiphone LEM-1DL 1-Call Master Station with Door Release
Overview
The Aiphone LEM-1DL is a single-call master station purpose-built for LE series door station systems. It delivers two-way voice communication via push-to-talk simplex protocol and includes an integrated normally-open dry contact rated for 30V AC/DC at 1A—sufficient to trigger electromagnetic door locks, magnetic holds, or relay-driven gate operators without requiring a separate control module. This compact design fits both wall and desk mounting, making it practical for small to mid-scale access control deployments where simplicity and cost-effectiveness matter more than multi-tenant complexity.
Key Features
- Two-way simplex voice communication: Push-to-talk design keeps wiring straightforward—no full-duplex audio switching logic required. Ideal for facilities where staff expect brief call exchanges rather than continuous conversation.
- Integrated door release contact (30V AC/DC, 1A): Eliminates the need for external relays or separate control boards when driving standard electromagnetic locks or push-button releases. Simplifies field wiring and reduces points of failure.
- Adjustable voice volume control: Accommodates ambient noise levels and user preference without requiring reprogramming or technician intervention.
- Wide cable run support: Supports 650 feet with 22 AWG shielded twisted-pair or 1,600 feet with 18 AWG—allows installation across larger buildings or warehouses on a single 2-conductor circuit. Longer runs reduce the need for intermediate repeaters or powered boosters.
- Low power consumption (16V AC 4W or 24V DC 200mA): Can be powered by a small transformer or standard 24V access control supply without straining infrastructure. 24V DC option integrates cleanly into modern PoE-adjacent systems.
- Compact wall or desk form factor: Mounts quickly above a desk or entry point. Minimal footprint does not obstruct sightlines or require custom cabinetry.
Integration & Compatibility
The LEM-1DL (often searched as LEM 1DL) is engineered exclusively for Aiphone LE series door stations. It does not interoperate with other Aiphone product lines (IX, GT, or IX series) or third-party systems. Wiring must use 2-conductor shielded cable to maintain signal integrity and minimize cross-talk, especially over longer runs. If your facility already hosts LE series substations, the LEM-1DL integrates without additional gateways or protocol converters.
For dual-master deployments—such as a main office and secondary entry point both controlling the same door—specify the LEM-1DLC variant instead. Single-master scenarios are handled by the standard LEM-1DL.
What's in the Box
- 1x LEM-1DL Master Station
- Wall/desk mounting hardware
Frequently Asked Questions
Q: Can I use the LEM-1DL with Aiphone IX or GT door stations?
A: No. The LEM-1DL is designed exclusively for LE series substations and is not cross-compatible with other Aiphone families.
Q: What's the maximum distance I can run cable from a door station to the LEM-1DL?
A: Up to 650 feet with 22 AWG shielded twisted-pair, or 1,600 feet with 18 AWG. Beyond these distances, signal degradation and crosstalk become problematic; consider a powered repeater or split the system into multiple zones.
Q: Can the LEM-1DL trigger an electric strike or magnetic lock directly?
A: Yes, if your strike or lock draws 1A or less at 30V AC or DC. Higher-current devices require an external relay wired to the dry contact output. Verify your door hardware's current draw before specifying the unit.
Q: Does the LEM-1DL support remote unlocking via IP or wireless?
A: No. It is a hardwired analog intercom master with a simple relay output. If you need IP-based access control, consider a modern IP intercom system or a dedicated access control panel with network integration.
Q: What power supply do I need for the LEM-1DL?
A: Either a 16V AC transformer (minimum 4W) or a 24V DC supply (minimum 200mA). Most standard 24V access control power supplies work well; confirm amperage headroom before connecting.
Q: Can I wall-mount or desk-mount the LEM-1DL?
A: Yes. The unit ships with mounting hardware for both configurations. Choose based on your control point layout—reception desk, security office, or entry vestibule.
When to Choose a Different Model
If your deployment requires multi-tenant operation or dual-master redundancy, specify the LEM-1DLC instead. If you need networked, cloud-enabled, or mobile-app-based access control, the LEM-1DL is not suitable—consider a modern IP-based access control system that integrates with your enterprise infrastructure. The LEM-1DL remains the right choice only when the facility is small enough to support analog intercom infrastructure and door release requirements are basic and locally controlled.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The LEM-1DL is a straightforward analog master station that solves a specific problem: small facilities need voice communication plus door release control without deploying a full IP intercom or access control panel. The 30V AC/DC, 1A dry contact is the real differentiator here—it lets you drive most standard electromagnetic locks and magnetic holds directly, eliminating the need for a separate relay card or external control module.
Technical Highlights:
- 1A @ 30V AC/DC dry contact: Handles standard electromagnetic strikes and magnetic locks without external amplification. Check your specific hardware's inrush current—solenoid locks sometimes draw more on initial actuation.
- 1,600-foot cable run (18 AWG): Real-world benefit for multi-story or sprawling facilities. Use shielded twisted-pair to avoid induced noise on longer runs, especially in electrically noisy environments.
- Low power draw (4W AC or 200mA DC): Pairs easily with compact transformer or existing 24V access supply. No infrastructure upgrades needed in most retrofit scenarios.
Deployment Considerations:
- This unit is analog-only and LE-series-only. If your facility already has IX or GT door stations, the LEM-1DL will not work—you'll need a different master.
- Push-to-talk simplex communication means only one direction at a time. In high-volume entry points (busy lobbies, warehouse receiving), staff may find the brief, one-way call pattern limiting compared to full-duplex IP intercoms.
- No network connectivity, no mobile app, no remote management. If compliance or operational audit requirements demand remote call logging or access records, this product does not deliver.
Deploy the LEM-1DL in small-to-medium facilities—warehouses, small office parks, light industrial buildings—where LE series door stations are already in place and you need cost-effective, locally controlled door release without modernizing to IP infrastructure. It is not a upgrade path; it is a complete, reliable endpoint for analog access control.
