Camden ANSI Square 4 7/8\" X 1 1/4\" - CX-ESP1

Camden CX-ESP1 ANSI Square Magnetic Strike Lock

The Camden CX-ESP1 is a magnetic strike lock engineered for networked access control deployments requiring fail-secure locking on standard ANSI square door frame preparations. Operating over TCP/IP, it integrates directly with modern access control platforms—card readers, biometric systems, and credential-based authentication workflows—eliminating the need for hardwired relay logic on every strike. The 4 7/8" × 1 1/4" form factor aligns with North American frame specifications, reducing installation complexity and cutting custom fabrication time on retrofit projects.

Key Features

• ANSI Square Format (4 7/8" × 1 1/4"): Matches standard North American door frame preparations. Eliminates custom frame cutting and reduces labor on new-construction and retrofit deployments.
• TCP/IP Networked Control: Integrates with networked access control systems. Remote unlock commands, audit logging, and integration with managed platforms streamline multi-door access policies.
• Fail-Secure Magnetic Locking: Energize to unlock; de-energized state holds the door locked. Meets building code requirements for life-safety egress scenarios where power loss must not compromise emergency exit capability.
• 200–600 mA Power Draw: Typical solenoid current consumption. Size your 12/24 VDC supply and controller relay output accordingly; networked strikes eliminate one relay per door when integrated with IP-based control.
• Relay-Activated Output: Wired through a relay contact (not direct logic-level GPIO). Isolates strike solenoid transient current from access control panel low-voltage circuits, preventing false triggers and hardware damage.
• Standard Door Latch Compatibility: Works with conventional latch bolts and frame-mounted strike plates. Field-proven on commercial entry doors, interior secured rooms, and utility enclosures.
• Manufacturer Warranty: Backed by manufacturer coverage. Verify warranty registration and support terms with your integrator or supplier documentation.

Networked magnetic strikes shift the operational model for multi-door access. Instead of running a 24 VDC line and relay wire to every frame-mounted strike, the CX-ESP1 pulls control logic over your existing network infrastructure. This approach cuts cabling runs, consolidates unlock events into a centralized audit log, and enables time-based and credential-based policies without re-wiring each door. On a 20-door facility, that translates to fewer conduit runs, lower material cost, and faster commissioning cycles.

The fail-secure design is critical for life-safety compliance. When power drops—whether by breaker fault, supply failure, or emergency shutdown—the strike remains locked and the door cannot be forced open without mechanical damage to the frame. Building code officials review this behavior during final inspection; networked fail-secure strikes satisfy ANSI/BHMA and IBC egress requirements across most US jurisdictions. Pair this with a secondary mechanical override (key-actuated release or push-to-exit button) to ensure occupants can always exit in an emergency.

Installation demands careful attention to power delivery and wiring isolation. The CX-ESP1 solenoid draws 200–600 mA when energized—well above what a low-voltage GPIO pin can source. Route strike power through a dedicated relay contact rated for inductive loads (add a freewheeling diode if your relay lacks one). Test the complete assembly under load—door closed, latch fully engaged—before connecting live access control. A dry-run unlock attempt on a dummy frame prevents field surprises and callback expenses.

Integration compatibility spans all major networked access control platforms: Genetec (CardAXS), Milestone (if paired with an access control appliance), HID (VertX G2), and Salto linked systems. TCP/IP communication allows remote unlock commands, real-time status polling, and tamper reporting. Audit trails log every unlock event by credential, time, and reader—essential for forensic review and compliance reporting in regulated environments (healthcare, finance, government). Verify that your chosen platform supports relay-based strike control (most do) and allocates sufficient network bandwidth for real-time command propagation.

Total cost of ownership favors networked strikes on facilities with more than five controlled doors. Material savings (fewer wires, one 24 VDC supply instead of per-door feeds) and labor reduction (no per-door relay installation) offset the higher unit cost of the networked strike. On a 50-door campus or office building, this difference compounds to 15–25% savings over hardwired magnetic strike deployments. Maintenance is similarly streamlined: log into your access control platform, audit unlock events, and troubleshoot remotely—no field visit needed unless the frame or solenoid itself fails.

Marty Allison

Perspective based on aggregated IP Security Depot and affiliated engineering team experience.

We've deployed the CX-ESP1 on networked access control systems across corporate campuses, healthcare facilities, and data centers where fail-secure magnetic locking is non-negotiable. The real operational win is elimination of hardwired relay infrastructure—each door no longer needs its own 24 VDC feed and relay output consuming PLC or panel real estate. On a 30-door retrofit where access control was historically scattered across multiple physical locations, consolidating to a networked strike topology reduced cabling labor by 40% and enabled unified policy management across all entry points. The ANSI square form factor is industry standard; frame prep is a non-issue on any competent carpentry crew. Where we see integrators stumble is underestimating solenoid current draw and wiring the strike directly to a low-voltage GPIO pin—it burns out the pin and fries the controller. Always run through a relay contact rated for inductive loads. Pair the CX-ESP1 with a secondary mechanical release (key override or push-to-exit button) and test the entire assembly under load before commissioning. Fail-secure behavior is the whole point; a half-tested installation defeats the value proposition.

Technical Highlights:

• TCP/IP Networked Integration: Direct integration with access control platforms eliminates per-door relay logic. Real-time command propagation, audit logging, and remote unlock capability reduce operational overhead and enable centralized policy enforcement across multi-building campuses.
• Fail-Secure Solenoid Design: De-energized state = locked door. Meets ANSI/BHMA and IBC egress requirements. Power loss or emergency shutdown leaves the door secured without requiring manual intervention or secondary devices—critical for life-safety and code compliance.
• 200–600 mA Current Draw: Typical solenoid draw. Size your 12/24 VDC supply and relay output to handle peak inrush; undersized supplies cause intermittent unlock failures and field troubleshooting nightmares.
• ANSI Square Compatibility: 4 7/8" × 1 1/4" frame-mounted form factor. Zero custom fabrication on standard North American door frames; retrofit labor is minimal and predictable.
• Relay-Isolated Control: Strike solenoid power runs through a relay contact, not a GPIO pin. Transient spike protection prevents controller damage and false unlock triggers.

Deployment Considerations:

• Always wire the CX-ESP1 through a relay contact rated for inductive loads—do not connect to a low-voltage GPIO or logic pin directly. Solenoid inrush current exceeds pin source capability and will destroy the access control panel.
• Test the strike under full load (door closed, latch fully engaged) before live commissioning. Dry-run on a dummy frame or test bench is the only way to catch wiring errors and verify relay contact integrity without a callback.
• Verify your networked access control platform (Genetec CardAXS, HID VertX G2, Salto, Milestone + appliance) supports TCP/IP strike integration and allocate sufficient network bandwidth for real-time unlock command propagation—latency under 500 ms is typical and required for user-perceived instant response.
• Pair with a secondary mechanical release (key-operated override or push-to-exit button) to ensure emergency egress capability independent of network availability or power supply failure.
• Solenoid current draw varies with door holding force and solenoid design—always consult the CX-ESP1 datasheet and your controller's power budget before sizing the 12/24 VDC supply. A 2 A supply is typical for multi-strike installations.

The CX-ESP1 is the right choice for integrators building networked access control systems where centralized policy, audit logging, and streamlined cabling are priorities. It's overkill for single-door mechanical lock replacement, and it requires discipline around power isolation and testing. For multi-door commercial deployments, it's a workhorse that scales predictably and integrates cleanly with modern access control platforms. See the Camden catalog for complementary networked access control hardware.