Description

Elevator door lock contacts SEL2-A1Z Brief Introduction

Product Name	Elevator door lock contacts
Model Number	SEL2-A1Z
Quality	Original.Brand New
Payment	T/T. Paypal. Western Union
Delivery	3-5 Working Days
Packaging	Packed by carton

Elevator Door Lock Contacts SEL2-A1Z: Safety Signal Core from Nanjing Zhuye Elevatorparts

Elevator Door Lock Contacts SEL2-A1Z are critical safety signal components for elevator door systems, specifically designed to monitor the locking state of elevator car doors and landing doors. As a core part of the elevator safety interlock circuit, they transmit “door locked” or “door unlocked” signals to the elevator controller—ensuring the elevator can only start and run when the doors are fully locked, and stopping immediately if the doors are unlocked unexpectedly during operation. The SEL2-A1Z contacts feature high sensitivity and reliable signal transmission, compatible with mainstream elevator door lock systems (including Siemens, KONE, and Mitsubishi), making them widely applicable to residential, commercial, and industrial elevators. Exclusively supplied by Nanjing Zhuye Elevatorparts, a professional provider of high-quality elevator electrical components, the Elevator Door Lock Contacts SEL2-A1Z fully complies with international elevator safety standards (EN 81-20, GB 7588) and electrical contact component specifications. Manufactured with premium silver alloy contacts and high-temperature resistant materials, it features excellent electrical conductivity, wear resistance, and anti-oxidation performance, winning trust from global elevator maintenance teams and manufacturers.

Nanjing Zhuye Elevatorparts adheres to the core philosophy of “Precise Signal, Safe Interlock” and implements strict quality control for the Elevator Door Lock Contacts SEL2-A1Z. Each unit undergoes multi-stage pre-delivery inspections, including contact resistance testing, signal transmission accuracy verification, high-temperature durability evaluation, and anti-oxidation performance detection. The SEL2-A1Z contacts adopt advanced materials and technologies: the contact points are made of silver-nickel alloy, ensuring low contact resistance (≤ 50mΩ) and excellent arc-extinguishing performance, supporting stable signal transmission for over 1 million times of switching; the contact base is made of high-temperature resistant PA66 plastic, adapting to the working temperature range of -20℃ to 120℃ in the door lock system; the wiring terminals are designed with clamping structures, ensuring firm connection with wires and avoiding poor contact due to vibration; the shell is equipped with a dust-proof cover, preventing dust and debris from entering the contact area. The standardized installation dimensions and pin definitions enable seamless matching with most elevator door lock devices, simplifying installation and replacement.

Step-by-Step Usage Guide for Elevator Door Lock Contacts SEL2-A1Z

To maximize the ecuricontrol accuracylubrication effectervice life, guidance accuracy, and operational stability of Elevator Door Lock Contacts SEL2-A1ZDoor Lock Device MKG161-01Control Box Lock E-431AC Contactor (LC1D09M7C/12F7C/18/50/40/32/25)Car Emergency Lighting (COP Control Box Emergency Round Light)Guide Shoe Lining (230*10MM/230*16MM)Oil Cup & Oil Box, strictly follow the professional guidelines provided by Nanjing Zhuye Elevatorparts for selection, installation, and maintenance:

1. Professional Selection & Pre-Installation Preparation

Installation must be performed by certified elevator electricians. Prior to selection, confirm the elevator’s door lock device model and contact specification requirements to ensure compatibility with the SEL2-A1Z contacts. Consult Nanjing Zhuye Elevatorparts’ technical team if unsure about matching. Preparation steps: Cut off the elevator’s main power supply and secondary power supply, and lock the power switch; place a “Maintenance in Progress” warning sign at the elevator entrance and shaft access door; fix the elevator car at a flat floor with mechanical supports; open the car door and landing door lock device covers, and disconnect the wiring of the old contacts (take photos to record the wiring position); clean the contact mounting position to remove dust, oil stains, and debris; prepare professional tools such as a screwdriver, multimeter, and wire stripper.

SignalFunctionFunctionFunctionFunction2. Correct Installation & Precision Adjustment

Contact Fixing: Take the Elevator Door Lock Contacts SEL2-A1Z from Nanjing Zhuye Elevatorparts, align it with the preset mounting slots or holes on the door lock device, and fix it with the matching screws (torque: 2–3N·m). Ensure the contacts are installed firmly without looseness, and the contact pins are aligned with the door lock mechanism (ensuring the contacts are closed when the door is locked and open when the door is unlocked).
Wiring Connection: According to the recorded wiring position and Nanjing Zhuye Elevatorparts’ wiring manual, connect the signal wires of the SEL2-A1Z contacts to the corresponding interfaces of the door lock controller. Distinguish between normally open (NO) and normally closed (NC) contacts to avoid wrong wiring (incorrect wiring will cause signal failure). Tighten the wiring terminals firmly and use cable ties to organize the wire harness to avoid contact with moving parts of the door lock.
Signal Test: Restore the secondary power supply first, and use a multimeter to test the contact state: When the door is locked, the normally closed contacts should be closed (resistance ≤ 1Ω), and the normally open contacts should be open (resistance ≥ 1MΩ); when the door is unlocked, the state should be reversed. Manually open and close the door several times to confirm the contact switching is sensitive and the signal transmission is stable. Adjust the contact position if there is a signal delay or failure.

3. Post-Installation Testing & Daily Maintenance

Comprehensive Function Testing: Restore the elevator’s main power supply and switch to inspection mode. Operate the elevator to run up and down, testing the contact function at each floor: Confirm the elevator controller receives the “door locked” signal only when the doors are fully closed (elevator can start), and the “door unlocked” signal when the doors are opened (elevator cannot start). Test the emergency unlocking function to ensure the contacts can accurately transmit the unlock signal.
Daily Inspection: Maintenance personnel should check the SEL2-A1Z contacts during daily shaft patrols: Observe the contact shell for damage, deformation, or loose mounting screws; check the wiring terminals for looseness, oxidation, or disconnection; use a multimeter to spot-check the contact resistance regularly (ensure it meets the standard). Clean the contact surface and surrounding area with a soft brush to remove dust and debris.
Regular Maintenance: Every 3 months, apply a small amount of contact cleaner to the contact pins (if oxidation is found) to restore conductivity (avoid using oil-based lubricants). Every 6 months, recheck the wiring connections and contact switching sensitivity. For elevators in high-humidity, high-temperature, or dusty environments, shorten the maintenance interval to 1 month and enhance anti-oxidation and dust-proof protection for the contacts.

Recommended Replacement Cycle for Elevator Door Lock Contacts SEL2-A1Z

As a core signal component enduring long-term mechanical switching, electrical arcing, environmental erosion (humidity, dust, temperature changes), and contact wear, the Elevator Door Lock Contacts SEL2-A1Z has a specified service life. Timely replacement is crucial to avoiding faults such as contact oxidation, poor contact, or switching failure—issues that may lead to incorrect signal transmission, causing the elevator to fail to start normally or run with doors open, endangering passenger safety.

1. Standard Replacement Cycle

Under normal operating conditions (elevator daily operation time 12–24 hours, daily door opening/closing times ≥ 1000, operating environment temperature -20℃ to 120℃, humidity 10%–95%), the recommended replacement cycle for the Elevator Door Lock Contacts SEL2-A1Z is 2–3 years. This cycle is determined based on Nanjing Zhuye Elevatorparts’ long-term field operation data, contact wear tests, and electronic component aging evaluations. The cycle fully considers the high-frequency switching of the contacts and the impact of the shaft environment on contact performance.

2. Adjustments for Special Scenarios

High-Traffic & Harsh Environments: For elevators in high-traffic areas (e.g., large shopping malls, airports with daily door opening/closing times ≥ 2000) or harsh environments (e.g., coastal areas with high salt spray, industrial sites with strong dust and electromagnetic interference), the replacement cycle is shortened to 1–1.5 years. High-frequency switching accelerates contact wear, while harsh environments cause rapid oxidation and aging of the contacts.
Low-Frequency Use & Stable Environments: For elevators with low usage frequency (e.g., villa elevators, small office buildings with daily operation time < 8 hours) and stable shaft environments (constant temperature and humidity, little dust), the replacement cycle can be extended to 3–4 years—only after Nanjing Zhuye Elevatorparts’ technicians inspect and confirm that the contact resistance, switching sensitivity, and anti-oxidation performance meet factory standards.

3. Immediate Replacement Conditions

Replace the Elevator Door Lock Contacts SEL2-A1Z immediately if any of the following issues occur, regardless of its service life:

The contact resistance exceeds 100mΩ, leading to poor signal transmission (manifested as the elevator failing to recognize the “door locked” signal or starting intermittently).
The contacts are severely oxidized, burned, or pitted (visible through inspection), causing intermittent signal loss or permanent contact failure.
The contact switching is stuck or delayed, leading to incorrect signal transmission (e.g., the elevator receives the “unlocked” signal when the door is locked).
The contact base is deformed or cracked due to high temperature or impact, and the internal structure is damaged—affecting the basic switching function and safety.

In conclusion, the Elevator Door Lock Contacts SEL2-A1Z from Nanjing Zhuye Elevatorparts is a high-quality, reliable safety signal component tailored for modern elevator door systems. By following the correct selection, installation, maintenance, and replacement guidelines, elevator maintenance teams can effectively ensure the accurate transmission of elevator door lock signals, eliminate potential safety hazards caused by signal failure, and safeguard the lives of passengers. Choosing Nanjing Zhuye Elevatorparts means you get 100% authentic SEL2-A1Z door lock contacts, plus professional support—including model matching, on-site wiring guidance, and prompt after-sales service. Trust Nanjing Zhuye Elevatorparts for the safe signal transmission of your elevator door system.

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