1. General Function & Purpose

• Safety Interlock Device: Ensures elevator doors remain securely locked while the cab is in motion.

• Prevents Accidental Door Opening: Critical for compliance with elevator safety standards (EN 81, ASME A17.1).

• Electrical Contact Switch: Cuts power or signals the control system if the door is not properly locked.

2. Key Features & Specifications

• Type: Normally Closed (NC) or Normally Open (NO) contact (varies by model).

• Actuation Method:

  • Mechanical (activated by door movement)

  • Magnetic (in some advanced versions)

• Voltage/Current Rating: Typically 24V DC/AC or 110V AC, 2–5A (verify exact specs for your model).

• Durability: Designed for high cycle counts (100,000+ operations).

• Material:

  • Housing: Reinforced plastic or metal (zinc/aluminum alloy).

  • Contacts: Silver-plated for reliable conductivity.

• IP Rating: Usually IP54 or higher (dust and splash resistant).

3. Installation & Compatibility

• Mounting Position: Installed on elevator door tracks, car doors, or landing doors.

• Commonly Used In:

  • Otis, ThyssenKrupp, Mitsubishi, Hyundai, and KONE elevators (compatible with many brands).

  • Passenger & freight elevators.

4. Safety & Certifications

• Compliance: Meets EN 81-20/50, ASME A17.1, and other regional elevator safety codes.

• Fail-Safe Design: Ensures elevator stops if the switch malfunctions.

5. Common Failure Symptoms

• Elevator won’t run (door lock signal missing).

• Intermittent operation (loose wiring or worn contacts).

• Error codes (e.g., "Door Lock Fault" on the control panel).

Xi’an Sulab Machinery Co., Ltd is committed to providing our customers with the highest quality elevator and escalator parts in the most timely and professional manner. The main brands are Otis, KONE, Sigma, Hyundai, , etc. There are also elevator and escalator spare parts of Chinese brands such as Canny, BLT and IFE. We also do OEM of escalators and moving walks, as well as modernization of elevators.

Our basic premise in building our business is to help our customers meet their requirements by providing exceptional customer service, competitive prices and quality OEM parts. We provide our valued customers with elevators and escalators with the best quality and competitive prices.

At the same time we also focus on modernizing our customers, but this is probably the best solution for those old elevator maintenance today. This not only solves high-value routine maintenance issues, but also extends the life of the elevator. Customers are our greatest asset, and we promise to all our customers that we will act with fairness, integrity and respect for everyone. We encourage and advocate innovation and creativity to serve every customer better than any competitor with value-for-money products and services. So far, we have successfully sold many elevator products to North America, South America, Middle East, Southeast Asia, Africa, Europe and other countries.

Xi'an Sulab Machinery Co., Ltd. uses excellent labels and packaging labels when delivering goods; carton boxes for light items; fumigation-free wooden boxes for heavy items; according to the urgency of customer needs and cost needs, using the most suitable delivery way to ship the parts. After delivery, write customers of the courier number and the latest logistics status in timely. When the goods nearly arrive at the destination place, remind the customer to contact the local express company or forwarder to make the custom clearance, so as to obtain the goods as soon as possible. We pay much attention to the order details. Before delivery, we will check and confirm the product information and pictures with the customer, after customer approval, then arrange the delivery.

Professional service,high quality parts and products,quick delivery, reasonable price,no after-care purchasing experience. No matter where you are,we will work with you to create a better future together.

Welcome to know more about us and look forward to cooperating with you.