Door Relays, Isolators, Locks & Bolts | Access Control Hardware

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

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

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Hikvision

SKU: DS-K4H250S

Hikvision DS-K4H250S Single-Door Electromagnetic Lock Controller

Single-door electromagnetic lock controller, 272 kg holding force
- 272 kg linear thrust secures wooden, metal, glass, and fireproof doors
- Dual voltage operation (12 VDC/500 mA or 24 VDC/250 mA) field-selectable
- NO/NC dry contact relay outputs (3A max) integrate with access control systems
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2N

SKU: 01976-001

2N IP Force High-Security Door Unit Bundle - 01976-001

Wired IP bundle adds tamper detection and electromagnetic lock control to 2N IP Force
- Tamper switch alerts on unauthorized access attempts in real-time
- Security relay manages electromagnetic locking through integrated access protocols
- I/O module integrates with third-party alarm and access control systems
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Hikvision

SKU: DS-K4H250D

Hikvision DS-K4H250D Double-Door Magnetic Lock

Dual-door magnetic lock with 272 kg holding force per door
- 272 kg (599.8 lbs) holding force per door handles wood, glass, metal, or fireproof doors
- Fail-safe design auto-unlocks on power loss; dry contact output for system integration
- Operates on 12 VDC/500 mA or 24 VDC/250 mA; LED indicators show lock status
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Hikvision

SKU: DS-K4H250-LZ

Hikvision DS-K4H250-LZ Magnetic Lock Bracket

Aldural bracket for DS-K4H250S/D magnetic locks on in-swinging doors
- L-bracket (250×47×28.5mm) and Z-bracket (180×50×50mm) configurations
- Aldural construction with sandblast finish resists corrosion and wear
- 0.75kg weight supports secure mounting in high-traffic entry applications
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$Camden CX-MA1214-12-BK 1/2\" Filler Plate for 1 200 lb. - CX-MA1214-12-BK$

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Camden

SKU: CX-MA1214-12-BK

Camden 1/2\" Filler Plate for 1 200 lb. - CX-MA1214-12-BK
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$Camden CX-MA1214-12D 1/2\" Filler Plate for Double Door 1 200 - CX-MA1214-12D$

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Camden

SKU: CX-MA1214-12D

Camden 1/2\" Filler Plate for Double Door 1 200 - CX-MA1214-12D
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$Camden 3/8\" Filler Plate for 600 lb. Magnetic$

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Camden

SKU: CX-MA0614-38

Camden 3/8\" Filler Plate for 600 lb. Magnetic - CX-MA0614-38
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$Camden CX-MA1214-38D 3/8\" Filler Plate for Double Door 1 200 - CX-MA1214-38D$

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Camden

SKU: CX-MA1214-38D

Camden 3/8\" Filler Plate for Double Door 1 200 - CX-MA1214-38D
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$Camden CX-MA1214-58 5/8\" Filler Plate for 1 200 lb. Magnetic - CX-MA1214-58$

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Camden

SKU: CX-MA1214-58

Camden 5/8\" Filler Plate for 1 200 lb. Magnetic - CX-MA1214-58
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$Camden CX-MA0614-58-BK 5/8\" Filler Plate for 600 lb. Magnetic - CX-MA0614-58-BK$

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Camden

SKU: CX-MA0614-58-BK

Camden 5/8\" Filler Plate for 600 lb. Magnetic - CX-MA0614-58-BK
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$Camden Aluminum endcaps 18\" length (Formerly$

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Camden

SKU: CM-PT250AL-18

Camden Aluminum endcaps 18\" length (Formerly - CM-PT250AL-18
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Camden

SKU: CM-PT375AL-18

Camden Aluminum endcaps 18\" length (Formerly - CM-PT375AL-18
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Camden

SKU: CX-MA1212

Camden Armature Housing for 1 200 lb. Magnetic Lock - CX-MA1212
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Camden

SKU: CM-PT250SS-12

Camden CM-PT250SS-12 Stainless Steel Endcaps 12"

12" stainless steel endcaps for Camden mounting frames, indoor/outdoor
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Camden

SKU: CM-PT250SS-18

Camden CM-PT250SS-18 Stainless Steel Endcaps 18"
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Camden

SKU: CM-PT250SS-24

Camden CM-PT250SS-24 Stainless Steel Endcaps 24"
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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.

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.

Door Relays, Isolators, Locks, & Bolts

Plan Your Deployment

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

Hikvision DS-K4H250S Single-Door Electromagnetic Lock Controller

2N IP Force High-Security Door Unit Bundle - 01976-001

Hikvision DS-K4H250D Double-Door Magnetic Lock

Hikvision DS-K4H250-LZ Magnetic Lock Bracket

Camden 1/2\" Filler Plate for 1 200 lb. - CX-MA1214-12-BK

Camden 1/2\" Filler Plate for Double Door 1 200 - CX-MA1214-12D

Camden 3/8\" Filler Plate for 600 lb. Magnetic - CX-MA0614-38

Camden 3/8\" Filler Plate for Double Door 1 200 - CX-MA1214-38D

Camden 5/8\" Filler Plate for 1 200 lb. Magnetic - CX-MA1214-58

Camden 5/8\" Filler Plate for 600 lb. Magnetic - CX-MA0614-58-BK

Camden Aluminum endcaps 18\" length (Formerly - CM-PT250AL-18

Camden Aluminum endcaps 18\" length (Formerly - CM-PT375AL-18

Camden Armature Housing for 1 200 lb. Magnetic Lock - CX-MA1212

Camden CM-PT250SS-12 Stainless Steel Endcaps 12"

Camden CM-PT250SS-18 Stainless Steel Endcaps 18"

Camden CM-PT250SS-24 Stainless Steel Endcaps 24"

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