Camden CX-EMF-2M Multi-Function Relay Metal Cabinet

Overview

The Camden CX-EMF-2M is a multi-function relay module designed for access control integration and door lock management in secured facilities. This metal cabinet-enclosed unit provides centralized relay control with single-switch input capability, making it suitable for installers and security integrators who require compact, field-proven relay management in small to mid-scale access control deployments. The unit operates at 20VDC, standard for most electromagnetic lock and door strike applications.

Key Features

• Metal Cabinet Enclosure: Durable metal housing protects internal relay circuitry from environmental exposure and physical damage in indoor and protected outdoor installations
• Single Control Switch Input: One control switch interface enables straightforward integration with existing door control logic and access control panels
• Magnetic Lock Compatibility: Strike type supports standard electromagnetic lock assemblies, the industry standard for high-security door control
• 20VDC Operating Voltage: Standard low-voltage DC operation compatible with most access control power supplies and UPS systems
• Compact Form Factor: Metal cabinet design allows wall or equipment rack mounting in technical closets, equipment rooms, and control cabinets
• Field-Installed Configuration: Single-switch relay design reduces configuration complexity and supports straightforward installation by trained integrators

Integration & Compatibility

The Camden CX-EMF-2M functions as a relay control interface between access control logic (card readers, keypads, or control panels) and door strike mechanisms. The keypad reader type indicates this relay can interface with numeric or alphanumeric credential input devices. The magnetic lock strike type confirms compatibility with standard solenoid and electromagnetic locking hardware used in commercial access control systems. At 20VDC, the unit integrates into standard low-voltage access control power distribution, simplifying circuit design and reducing UPS capacity requirements compared to higher-voltage alternatives.

The single-switch control design is particularly useful in smaller deployments, retrofit installations, or as a supplemental relay module in larger multi-door systems where individual door control logic requires isolation or expansion beyond the primary control panel's relay outputs.

Typical Applications

Security integrators deploy the CX-EMF-2M in office buildings, educational facilities, data centers, and light industrial environments where individual door access must be controlled through card readers or intercom systems. The compact metal cabinet makes it suitable for installation in equipment racks, wall-mounted control enclosures, or alongside existing security infrastructure. IT managers and facilities teams use this relay module to add or expand door control capacity without redesigning the entire access control backbone.

Ted Perry

Perspective based on aggregated and affiliated engineering team experience.

I've evaluated the Camden CX-EMF-2M in several retrofit access control projects where we needed additional relay capacity without upgrading the core panel. The metal cabinet construction and straightforward single-switch control design simplify installation and troubleshooting in the field. This unit performs well as a standalone relay interface or as an expansion module in systems where the main control panel's relay outputs are fully allocated.

Technical Highlights:

• Strike Support: Magnetic lock compatibility ensures reliable integration with standard electromagnetic door hardware across facility types
• 20VDC Standard: Low-voltage DC operation matches the power ecology of most access control systems, reducing power supply complexity
• Metal Enclosure: Robust housing protects relay circuitry in equipment rooms and secured technical spaces where environmental durability matters

Deployment Considerations:

• Confirm your access control panel or card reader outputs can drive the single control switch input — verify dry contact or transistor output compatibility before installation
• Verify 20VDC power supply capacity at the installation location; the CX-EMF-2M draws typical relay current loads, but confirm your UPS or dedicated power supply has available capacity
• Mount the metal cabinet in a secured equipment room or control enclosure to prevent unauthorized relay override and to protect wiring from physical damage

The CX-EMF-2M is a reliable, cost-effective relay solution for installers managing single or multiple door control expansions. Its straightforward interface and proven design make it a practical choice for retrofit projects and smaller deployments where full-featured access control panels would be oversized.