Contractor and Facility Manager Education Series #9 — Access Control and Electrified Hardware: Integrating Electronics into the Opening

Access control is one of the fastest-growing areas of commercial building technology, and it runs directly through the door opening. Card readers, fobs, mobile credentials, biometrics — all of it eventually has to interface with physical hardware that either holds a door locked or releases it. And that interface — where the access control system meets the mechanical opening — is where a lot of integration problems originate.

This article covers the physical hardware side of electrified openings: what the components are, how they work, what fail-safe vs. fail-secure means and why it matters, and how to coordinate the electrical and physical aspects of an electrified opening without creating code problems.

The Basic Architecture of an Electrified Opening

An electrified opening combines a credential reader (card reader, keypad, biometric, mobile), a controller (the intelligence that decides whether to grant access), and an electrified hardware component (the device that physically locks or unlocks the door in response to the controller's signal).

The hardware components we're focused on here are the devices at the door itself — the electric strike, electrified lockset, magnetic lock, or electrified exit device. These are the products that translate an electronic signal into a physical change in the opening's lock state.

Fail-Safe vs. Fail-Secure

Before any other discussion of electrified hardware, this distinction has to be understood, because it drives the product selection at every electrified opening.

Fail-safe hardware unlocks when power is lost. No power = door unlocked (or, for a holder, door released). Fail-safe is the appropriate configuration at egress doors — because in a fire or emergency causing a power failure, the door should always be free for occupants to exit. Most electrified hardware on exit paths is fail-safe for this reason.

Fail-secure hardware locks when power is lost. No power = door locked. This is the correct configuration for security-sensitive openings where the default state should be locked — server rooms, pharmaceutical storage, secured areas. When power fails, the door stays locked rather than swinging open.

The code implications are significant: fail-secure hardware is generally not permitted at egress doors unless there's a manual override (like a mechanical lock cylinder) that allows egress without power. Using fail-secure hardware on an exit door without understanding this constraint is a code violation and a life safety problem.

Electric Strikes

An electric strike replaces the standard fixed strike in the door frame. The electrically actuated component is a hinged or pivoting "keeper" that normally holds the latchbolt in — locking the door. When the strike receives an electrical signal, the keeper releases, allowing the latchbolt to retract as the door is pushed or pulled open.

Electric strikes have several advantages: they work with standard cylindrical or mortise locksets, they allow egress from the inside without electrical power (the inside lever or exit device operates normally), and they can be retrofitted into existing openings without major door modification.

They come in fail-safe and fail-secure configurations. For most access-controlled entry doors on egress paths, fail-safe is the correct choice. For security doors where the default is locked and egress isn't a primary concern (a secured equipment room with another egress path), fail-secure is appropriate.

Electric strikes are available in standard, heavy-duty, and high-security grades. The frame must be prepped for the strike during manufacturing — a standard frame prep may not accommodate an electric strike without modification, so this needs to be on the frame specification before the order goes in.

Electrified Locksets and Mortise Locks

An electrified lockset integrates an electric component into the lock body itself — allowing the lock cylinder function, the latchbolt, or both to be controlled electrically. Electrified cylindrical locksets are available for standard commercial applications; electrified mortise locks provide the full functionality of a mortise case with electrical control.

These devices can control which direction requires a credential (outside only, both sides), whether the outside lever is energized or de-energized to lock, and in some configurations, whether the latchbolt can be retracted electrically for remote release.

Electrified mortise locks are the preferred solution at high-use exterior access-controlled doors — main building entries, parking structure entries, secured areas in office buildings. They provide the mechanical security of a mortise lock combined with electronic control, in a relatively clean installation that doesn't require a separate frame strike modification.

Magnetic Locks (Maglocks)

A magnetic lock mounts a powerful electromagnet on the door frame header and a corresponding armature plate on the door face. When energized, the magnet holds the door shut with substantial force — typically 600 to 1,200 lbs of holding force on commercial maglocks. When de-energized (by a valid credential, a request-to-exit button, or a power interruption), the door is free.

Maglocks are inherently fail-safe — no power means no holding force, so the door opens. They're commonly used on aluminum storefront entries, glass doors, and other openings where conventional lock hardware can't be easily installed.

The code requirements around maglocks are specific and must be followed. Because a maglock prevents egress when energized, it must be integrated with a compliant release system: typically a request-to-exit (REX) sensor or button on the egress side that releases the lock for a set time, a motion sensor that releases the lock when someone approaches, and a connection to the fire alarm system that releases the lock on alarm. Without all of these, a maglock is a code violation at an egress door.

Maglocks also cannot be used on fire-rated doors in most configurations — the door must be able to close and latch, and a maglock provides no latching mechanism.

Door Position Switches

A door position switch (DPS) is a magnetic or mechanical sensor that tells the access control system whether the door is open or closed. It sounds simple, but it's a critical component of any functional access control installation.

Without a door position switch, the system doesn't know if the door is being held open, propped, or forced. It can grant access, but it can't detect a door that was left open after that access event. Monitoring door position is fundamental to security — a door that's been open for 30 seconds after an access event has probably been propped, and the system should be alerting.

DPS devices are typically surface-mounted or recessed into the frame and door edge. They need to be specified and installed as part of the opening, not added as an afterthought.

Request-to-Exit Devices

A request-to-exit (REX) component signals the access control system that someone is intentionally exiting — allowing the door to open without triggering a forced-door alarm. REX devices include push buttons, passive infrared (PIR) motion sensors that detect approach to the door, and pressure-sensing mats.

On openings with electric strikes, the REX signal typically shunts the door alarm rather than releasing the lock (the interior mechanical hardware handles egress). On openings with maglocks, the REX releases the maglock for a timed period to allow exit.

Coordination Requirements

This is where electrified openings get complicated in practice. The access control hardware involves multiple trades — the door and hardware contractor installs the physical hardware, the low-voltage contractor (or security contractor) installs the readers, controllers, and wiring, and the general contractor is responsible for ensuring the electrical rough-in (conduit, power supply locations) is in place before walls close.

Breakdowns in this coordination show up most often as: missing conduit in the door or frame, no power supply near the opening, frame or door not prepped for the electrified device, or access control hardware that doesn't physically match what was specified.

The solution is a coordinated submittal that includes the hardware contractor, the access control installer, and the electrical contractor reviewing the same opening drawings before rough-in begins. Electrified openings are not a "wire it up at the end" category. They need to be coordinated from the frame order forward.

Wire Transfer Devices

When electrified hardware is mounted on the door itself (rather than on the frame), power has to transfer from the frame across the hinge to the door. This is done via a wire transfer device — typically an electric hinge (with wiring through the hinge barrel) or a continuous hinge with integral wiring, or a separate wire harness device that routes through the hinge area.

This is a detail that has to be specified upfront. A door with electrified hardware mounted on it needs the correct hinge or transfer device — and the door and frame need to be prepped to route that wiring. It's not something that can be solved at installation without modification.

Access control at the opening level is powerful, but it requires more coordination than almost any other opening component. The buildings that do it well treat the electrified opening as a systems integration problem from day one, not a hardware add-on at the end.

Next — and last — in this series: how to read a hardware schedule and door schedule. The two documents that should be running every opening on a commercial project.

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