Door Relays, Isolators, Locks, & Bolts

Door relays, isolators, electric locks, and bolt hardware connect access control systems to physical door security. Proper selection ensures reliable operation, electrical protection, and compliance with life-safety requirements in commercial deployments.

Plan Your Deployment

Fail-safe vs fail-secure lock configuration
Door type and mounting surface compatibility
Voltage requirements and power supply capacity
Relay isolation to protect controller boards
Local fire and building code compliance

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Showing Results for Door Relays, Isolators, Locks, & Bolts

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HES

SKU: RP-44WIRED

HES RP-44WIRED SPDT Wired Electric Strike Relay

Wall-mounted SPDT relay for hardwired HES electric strike control
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HES

SKU: RU420

HES RU420 Stainless Steel Strike Plate with LED

Stainless steel strike plate with dual LED lock status indicators
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HES

SKU: SB-1

HES SB-1 Sex Bolt Fastener for Electric Strike

Sex bolt fastener for HES electric strike mounting and alignment
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HES

SKU: SB-1-03

HES SB-1-03 Sex Bolt Fastener US03

Sex bolt fastener for HES/Assa Abloy access control systems
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HES

SKU: SB-MXD

HES SB-MXD Sex Bolt Kit Door Mount Hardware

Sex bolt door mount hardware kit for access control systems
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HES

SKU: SB:5200-12/24D

HES SB:5200-12/24D Strike Latch Bolt Monitor

Real-time latch bolt monitoring for HES electric strike systems
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HES

SKU: SB:V3-12V

HES SB:V3-12V Electric Strike Body

12V fail-secure strike for Vista access control systems
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HES

SKU: SLP-1L

HES SLP-1L Electronic Strike Lock 12V DC

12V DC solenoid strike for single-gang retrofit and new installs
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HES

SKU: SLP-1M

HES SLP-1M Electric Strike 12V Stainless Steel

12V DC stainless steel strike for standard access control systems
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HES

SKU: SLP-2L

HES SLP-2L Electric Strike Lock Accessory

12V stainless steel electric strike with dual solenoid support
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HES

SKU: SLP-2M

HES SLP-2M 12V Electric Strike Lock

12V DC electric strike with dual solenoids for access control
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HES

SKU: SLP-4L

HES SLP-4L Electric Strike Lock

4-unit electric strike lock, 12V DC, stainless steel, fail-secure
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HES

SKU: SMB

HES SMB Surface Mounting Box for Rim-Exit Devices

Surface mount box for rim-exit devices on inactive door leaves
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HES

SKU: SMLS

HES SMLS Stainless Steel Surface Mount Lock Housing

Stainless steel surface mount housing for HES electromagnetic locks
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HES

SKU: SMSS

HES SMSS Surface Mount Strike Housing

Stainless steel surface mount strike for SAM systems, no mortise
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HES

SKU: SPX-9321

HES SPX-9321 Strike Lock Controller with DSW-1

IP strike lock controller with dual door status modules for networked access
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Browse by Product Family

Click through to shop the families that fit your door relays, isolators, locks, & bolts deployment.

Door Relays & Isolators

Relay modules and electrical isolators bridge access control systems to door hardware, providing voltage conversion, current isolation, and surge protection. Essential for safe integration of low-voltage controllers to high-current locking mechanisms.

Electric Strikes

Electric strike plates replace mechanical latches to enable remote or automated door release. Integrates directly with access control panels for fail-safe or fail-secure operation.

Magnetic Locks

Electromagnet-based locking delivers high holding force with minimal moving parts. Ideal for high-traffic or high-security doors where reliability and fail-safe defaults are critical.

Electric Bolts & Latch Hardware

Solenoid-driven bolts and motorized latch assemblies provide positive mechanical locking with electrical control. Used in cabinet locks, gate hardware, and secured access points.

Channel Output Devices

Multi-channel relay and output boards distribute access control signals to multiple door hardware endpoints. Reduces wiring complexity in large deployments.

Exit Button Interfaces

Hardwired and wireless emergency exit buttons integrate with relay logic for fail-safe or fail-secure release. Complies with life-safety codes for controlled egress.

What to Look For When Buying

The decisions that matter most before you spec.

Fail-Safe vs. Fail-Secure Selection

Fail-safe locks release on power loss (emergency egress); fail-secure locks lock on power loss (high-security). Door type, occupancy code, and security posture determine the correct choice. Life-safety requirements override security preference in most jurisdictions.

Power Budget & Electrical Protection

Electric locks and solenoids draw significant peak current (5–12A per device). Calculate total load against control panel output specs, use relay isolation and surge suppressors to prevent controller damage, and size power supplies accordingly. System reliability depends on stable, protected power delivery.

Integration with Access Control Panels

Relays and isolators convert low-voltage digital signals from controllers (24VDC logic) to higher-voltage, higher-current outputs needed by locks. Verify panel output specifications match relay input ratings and locking mechanism voltage/current before ordering.

Wiring & Conduit Standards

Door hardware circuits require separate, shielded runs to minimize cross-talk with camera or network cables. Use 18–14 AWG for relay logic, 10–12 AWG for lock power feeds. Conduit separation from data lines improves noise immunity and compliance audits.

Monitoring & Feedback Circuits

Many door locks include magnetic or mechanical switches that report lock status back to the controller. Confirm your relay supports both output and input sensing; missing feedback can leave security gaps undetected. Multi-point entry scenarios demand per-door monitoring.

UL & Life-Safety Certification

Door hardware must meet UL 294 (access control) or UL 1034 (electromagnetic locks) and comply with local fire codes. Verify products carry required certifications for your jurisdiction and occupancy type; non-compliant installations can void insurance and create liability.

Technology Stack

The specs and acronyms that actually affect door relays, isolators, locks, & bolts performance.

Holding Force (lbf/kgf)

Measures the electromagnetic or mechanical grip strength of a lock under static load. Higher force (1200–3000 lbf) is required for high-traffic or high-security doors. Verify the force rating exceeds the door's dead weight plus anticipated push/pull stress.

Voltage/Current Requirements (24VDC, 12VDC, 120VAC)

Specifies the control signal input and power consumption of the relay or lock. Most access panels output 24VDC; mag locks often require dedicated 12VDC or higher supplies. Isolators step voltage up or down to match hardware specs; mismatched voltage can destroy devices or cause nuisance trips.

Relay Contact Rating (NO/NC, Form A/C)

Describes whether a relay switches voltage on (Normally Open) or off (Normally Closed), and if it combines both in one unit (Form C). Multi-form relays handle both fail-safe and fail-secure configurations from a single output.

Time-Delay & Pulse Control

Allows an access panel or external timer to hold a lock open for a set duration (e.g., 2–5 seconds) before automatic re-lock. Prevents tailgating and ensures controlled egress. Adjustable delay accommodates different door speeds and user mobility needs.

Surge Suppression & MOV Protection

Metal-oxide varistor (MOV) or diode clamps absorb voltage spikes when solenoids de-energize, protecting downstream logic circuits from damage. Essential in multi-lock installations where rapid switching causes inductive kickback.

Status Feedback & Sensor Inputs

Door position switches (magnetic or mechanical) report lock state (open/closed/jammed) to the access panel. Dual-input relays support both control command and status confirmation, enabling alarms when doors fail to lock or unlock as commanded.

Typical Deployment Scenarios

Small Office (2–4 Doors)

Install individual relay modules for each electric strike or mag lock, wired to a single 24VDC access panel output. Use DIN-rail relays in a cabinet near the panel for easy troubleshooting. Total power: ~30W (8–10 locks at 3–5W standby each). Example products: HES 9000/9100, 2N Helios IP relays.

Mid-Size Facility (8–20 Doors)

Deploy a multi-channel output device (8–16 channels) to distribute signals from the main controller to distributed relays or smart locks. Use isolated 12VDC supplies for mag locks, 24VDC for strikes. Mix fail-safe (entrance, emergency egress) and fail-secure (server rooms, vaults).

High-Security Building (40+ Doors)

Implement hierarchical relay architecture: main controller → zone relay modules → per-door isolators with status feedback. Use twisted-pair shielded cable for all lock circuits, separate conduit from network/camera runs. Monitor lock status and relay health across all zones via the access panel.

Emergency Egress Retrofit

Add relay-controlled solenoid bolts or electric strikes to existing mechanical locks without full door replacement. Integrate emergency exit buttons with fail-safe relay logic to ensure occupants can exit instantly on power loss or manual override. Comply with ADA and IBC occupancy code requirements.

Top Brands for Door Relays, Isolators, Locks, & Bolts

Click through to each brand for engineering profile and NDAA compliance status.

HES

Authorized dealer · browse the full HES catalog for this category

Hikvision

Authorized dealer · browse the full Hikvision catalog for this category

Authorized dealer · browse the full 2N catalog for this category

Frequently Asked Questions

What's the difference between a relay and an isolator?

A relay switches voltage on and off using an electromagnet (e.g., 24VDC input triggers a 12VDC or 120VAC output). An isolator goes further: it uses a transformer or optocoupler to galvanically separate the input and output, preventing ground loops and protecting the control panel from voltage spikes. Use isolators in noisy environments (parking garages, factories) or when powering multiple high-current devices from one panel.

Can I connect a magnetic lock directly to my access control panel?

No. Most panels output 100–500mA at 24VDC, but mag locks draw 1–3A at 12VDC or 24VDC. Direct connection will damage the panel. Always use a relay or dedicated power supply between the panel and lock. Verify the relay's input rating matches your panel output and the relay's output rating matches the lock's power specs.

What is fail-safe vs. fail-secure, and which should I choose?

Fail-safe locks unlock when power is cut (ideal for emergency egress, fire stairs, ADA-required exits). Fail-secure locks stay locked when power is lost (ideal for high-security areas like server rooms or vaults). Life-safety codes typically mandate fail-safe for occupied spaces. Use fail-secure only in controlled-access zones where occupants are not at risk.

How do I know what voltage and current my door lock needs?

Check the product datasheet or label on the lock body. Most electric strikes and mag locks are rated for 12VDC or 24VDC and draw 0.5–3A during energization. Size your power supply and relay to handle peak current (not steady-state), and use a relay with surge suppression to protect your access panel.

Do I need a separate power supply for each lock?

Not always. A single 24VDC or 12VDC power supply can feed multiple locks if the total steady-state current stays below the supply's rating (typically 5–10A). However, use a multi-channel relay board to isolate each lock's circuit and prevent one device's failure or surge from affecting others.

What does 'holding force' mean and why does it matter?

Holding force (measured in pounds or kilograms) is the electromagnetic or mechanical grip strength of a lock when energized. A 1200 lbf mag lock holds a standard 180-pound door against moderate push-pull forces; 2000+ lbf is needed for double doors or high-traffic areas. If your holding force is too low, tailgating or forced entry becomes easier. Consult your security plan and door weight/usage profile.

Related Categories

Adjacent equipment that typically ships alongside these products.

Exit Buttons Electric Strikes Magnetic Locks Channel Output Devices

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