XEL-K(M) electromagnetic safety interlock switch | XURUI-Zhejiang XURUI Electronics Co., Ltd.

Safety Door Switch

XEL-K(M) Electromagnetic Safety Interlock Switch (3A)

The XEL-K Electromagnetic Safety Interlock Switch is a high-performance safety door switch designed for machine guarding, industrial automation, and access protection systems. Combining electromagnetic locking and safety monitoring functions in a single compact unit, it prevents unauthorized access to hazardous areas while machinery is operating.

Featuring four sets of gold-plated contacts, up to 14 contact combinations, a 1300N locking force, LED status indication, emergency release functionality, and optional rear unlocking capability, the XEL-K offers exceptional flexibility for complex safety circuits. Compatible with multiple actuator key styles and locking modes, it is ideal for advanced machine safety applications requiring reliable interlocking and monitoring functions.

Rated Current: 3A

Locking Force: 1300N

Contacts: 4 Sets of Gold-Plated Contacts

Contact Combinations: 14 Configurations Available

Status Indication: Built-in LED Indicator

Emergency Release: Standard

Optional Function: Rear Unlock Mechanism

Actuator Compatibility: 11 Operating Key Options

Housing Head Options: Metal Head (M) / Resin Head (P)

Locking Modes: Electromagnetic Lock / Mechanical Release Mechanical Lock / Electromagnetic Release

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Product Features

Designed for Advanced Safety Systems

Suitable for safety circuits requiring both guard locking and multiple monitoring signals.
Compact Industrial Design

Slim-profile housing reduces installation space requirements while maintaining robust safety performance.
Compatible with Multiple Actuator Keys

Supports 11 different actuator key styles, including T-type, L-type, long-type, adjustable, and multifunction actuators.
Multiple Locking Methods Available

Supports both power-to-lock and power-to-release configurations to meet various safety standards and application requirements.
Optional Rear Unlock Function

Additional rear unlocking capability provides greater installation flexibility and service convenience.
Emergency Release Function

Integrated emergency unlocking mechanism enhances operator safety during maintenance and emergency situations.
LED Status Indicator

Built-in LED indication provides clear visual feedback of operating status.
Extensive Contact Configuration Options

Offers 14 different contact combinations, allowing flexible integration into complex safety control systems.
Four Sets of Gold-Plated Contacts

Gold-plated contacts ensure superior conductivity, corrosion resistance, and long-term reliability.
High Locking Force

Provides a holding force of up to 1300N to prevent accidental or unauthorized opening of safety doors.
Integrated Safety Interlock and Door Monitoring

Combines safety door monitoring and electromagnetic locking functions for enhanced machine protection.

Product Introduction & Process

1

Safety-Critical Material Inspection

Housing materials, contact alloys, terminals, springs, locking components, operation keys, solenoids, seals, and cable glands are inspected. Safety-related components receive enhanced dimensional and material verification.

2

Housing Forming and Precision Machining

Metal housings are die-cast and machined, while plastic housings are precision injection molded. Key insertion slots, rotating-head interfaces, mounting holes, terminal chambers, and locking interfaces are produced within controlled tolerances.

3

Operation Key Manufacturing

Operation keys are stamped, formed, machined, and surface-treated. Key thickness, insertion profile, mounting holes, strength, and engagement dimensions are inspected to ensure reliable interaction with the switch head.

4

Contact and Terminal Production

Copper-alloy terminals and contact carriers are precision stamped. Silver or gold-alloy contact points are riveted or welded onto the contact components according to the required load and signal level.

5

Direct-Opening Contact Mechanism Assembly

Normally closed safety contacts are assembled with a mechanically driven direct-opening structure. The mechanism is designed so that actuator movement physically separates the safety contacts rather than relying only on spring force.

6

Mechanical Interlock Assembly

Cams, plungers, shafts, guide components, return springs, key-detection parts, and locking elements are assembled. Component alignment and movement are controlled to prevent false operation or incomplete contact transfer.

7

Solenoid Locking Module Assembly

For guard-locking models, the electromagnetic coil, armature, locking pin, manual release mechanism, and monitoring contacts are assembled. Coil resistance, movement, locking engagement, and release performance are checked.

8

Rotating Head and Key Entry Assembly

The operating head is assembled and configured for the permitted key insertion directions. Key insertion, rotation, withdrawal, and head positioning are tested to ensure smooth operation without excessive clearance.

9

Terminal Wiring and Cable Entry Assembly

Terminal blocks, internal wires, connectors, protective earth components, and cable glands are installed. Wiring sequence and conductor fastening are checked to prevent incorrect safety-circuit connections.

10

Sealing and Housing Closure

Gaskets, O-rings, shaft seals, cable seals, and terminal covers are installed. Housing screws are tightened using controlled torque to maintain mechanical strength and the required environmental protection.

11

Safety Function Calibration

The key insertion position, contact opening position, locking point, release point, and monitoring-contact sequence are measured. The safety contacts must open within the specified actuator travel.

12

Locking and Mechanical Strength Testing

Guard-locking models are tested for locking force, key retention, manual release operation, repeated locking cycles, and resistance to mechanical pull or impact according to the applicable specification.

13

Electrical and Insulation Testing

Each unit is tested for contact continuity, forced-opening performance, contact resistance, insulation resistance, dielectric strength, coil operation, LED indication, and terminal accuracy.

14

Environmental and Endurance Verification

Sample units undergo mechanical life, electrical life, vibration, impact, temperature, humidity, dust, water, and cable pull testing according to product requirements.

15

Final Safety Inspection and Packaging

Safety markings, contact diagrams, key types, head direction, terminal covers, screws, sealing components, and accessories are checked. Products are batch-coded to maintain traceability of safety-critical components and inspections.

Customization & Delivery

We support the following types of customization

Electrical Parameter Customization :

Custom voltage & current, AC/DC type, zero-cross or random trigger.
Mounting Structure Customization :

Custom mounting, terminals and non-standard dimensions.
Heat Dissipation & Protection Customization :

Custom heat dissipation, high isolation, potting and anti-corrosion protection.
Function Upgrade Customization :

Overheat/overcurrent protection, anti-interference, delay and soft start optional.
Appearance & Brand Customization

Custom logo, marking, OEM/ODM and personalized solution design.

Proofing Cycle

Regular customization: 3-7 working days
Complex Customization: 7-15 working days
Urgent Sampling: 24-72 hours
Proofing Cost ( $ )

2222 US dollars
MOQ

Conventional products have no minimum order quantity. Customized products can be consulted with customer service
Delivery Time

The delivery time usually varies depending on the quantity and model of the order, usually 3-5 days. For specific times, please consult us

Frequently Asked Questions

How can I get an accurate quotation?

Please provide the product model or drawing, application, voltage and current, actuator or terminal configuration, cable requirements, expected quantity, destination market and required certifications. The more complete the information, the faster we can recommend a suitable solution and prepare an accurate quotation.
What is not covered by the warranty?

The warranty does not cover damage caused by incorrect wiring, excessive electrical load, improper installation, unauthorized modification, misuse, normal wear or operation outside the product’s specified environmental conditions. Final warranty coverage is subject to the applicable product specification and sales agreement.
What does the product warranty cover?

The warranty covers verified defects in materials or manufacturing under the specified operating and installation conditions. Depending on the case, XURUI may provide technical analysis, replacement parts, repair or product replacement in accordance with the agreed warranty terms.
What is your standard production lead time?

Lead time depends on product type, order quantity, material availability and customization requirements. Standard products generally have shorter lead times, while customized products require additional time for approval, tooling or validation. The confirmed delivery schedule will be stated in the quotation.
Which certifications and compliance documents are available?

Certifications vary by product series and target market. Applicable certificates, test reports and material compliance documents can be provided for qualified models. Please confirm the exact product number and destination market before requesting documentation.
Can you support samples and small trial orders?

Yes. We support sample orders and small trial orders for most standard products. The minimum order quantity depends on the product series, specifications and packaging requirements. Please send us the part number or application details for confirmation.
What customization services do you offer?

We provide OEM and ODM support, including actuator structures, terminals, cables, connectors, electrical ratings, housing colors, labels and packaging. Each request is reviewed for technical feasibility, tooling requirements, testing and expected order volume.
How long does custom sample development take?

Sample lead time depends on the level of customization. Changes ivolving existing components are generally faster, while new molds, special materials or additional validation require more time. A confirmed schedule will be provided after reviewing your drawings and specifications.
How are custom sample costs calculated?

Sample costs may include materials, tooling, engineering, testing and certification-related expenses. We provide a detailed quotation before development begins. Any arrangement for refunding or crediting sample fees will be stated clearly in the quotation.
How do you ensure product traceability?

Key materials, production batches, assembly records and test results are controlled through lot identification. This allows us to trace products back to relevant materials, production dates and inspection records when required.
What quality inspections are performed?

Our quality process includes incoming material inspection, in-process control, functional testing and final inspection. Product-specific checks may include operating force and travel, contact resistance, insulation resistance, dielectric strength, sealing performance, temperature rise and endurance validation.