Description
Elevator door lock contact AS-03 Brief Introduction
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Product Name |
Elevator door lock contact |
| Model Number | AS-03
CR2-A2 |
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Quality
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Original.Brand New
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Payment
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T/T. Paypal. Western Union
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Delivery
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3-5 Working Days
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Packaging
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Packed by carton
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Elevator Door Lock Contact AS-03 CR2-A2: Critical Safety Component from Nanjing Zhuye Elevatorparts
The elevator door lock contact is a core safety component of the elevator system, responsible for monitoring the locking status of the elevator car door and landing door. It only allows the elevator to start and run when the doors are fully locked, and immediately cuts off the running circuit if the doors are abnormally opened, thus ensuring passenger safety. The Elevator Door Lock Contact AS-03 CR2-A2, exclusively supplied by Nanjing Zhuye Elevatorparts, is precision-engineered for modern passenger and freight elevators. Compliant with international safety standards such as IEC/EN 60947-5-1 and GB 7588, this door lock contact integrates high-precision contact points, reliable spring mechanisms, and durable insulation structures, making it compatible with mainstream elevator brands including Schindler, OTIS, KONE, and domestic well-known brands. It is widely used in residential buildings, commercial complexes, office buildings, and industrial sites, providing a solid safety barrier for elevator operations.
Nanjing Zhuye Elevatorparts has always adhered to strict quality control standards, and the Elevator Door Lock Contact AS-03 CR2-A2 is a concentrated embodiment of this philosophy. Each contact undergoes multiple rigorous tests before leaving the factory, including contact resistance testing, mechanical life testing, high-temperature and low-temperature resistance tests, corrosion resistance tests, and insulation performance detection. The contact points are made of silver alloy materials, which have excellent electrical conductivity and wear resistance, ensuring stable contact and low contact resistance even after long-term use. The shell is made of high-strength flame-retardant plastic, which can effectively resist the erosion of dust, moisture, and oil stains in the elevator shaft. The built-in spring mechanism has precise elasticity, ensuring that the contact can be quickly closed and opened, and the mechanical life can reach more than 1 million times. In addition, the contact is equipped with a dust-proof cover to prevent impurities from entering and affecting the contact performance.
Usage Guide for Elevator Door Lock Contact AS-03 CR2-A2
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1. Pre-Installation Preparation
First, cut off the main power supply of the elevator and the power supply of the door lock system, lock the power switch, and place a “Maintenance in Progress” warning sign at the elevator entrance and machine room to prevent accidental startup. Prepare professional tools such as screwdrivers, pliers, multimeters, contact resistance testers, and anti-static gloves. Clean the installation position on the elevator door lock body to remove dust, debris, and oil stains, as these impurities may affect the contact between the door lock contact and the lock tongue. Carefully inspect the AS-03 CR2-A2 door lock contact for external damage, such as cracks on the shell, damage to the contact points, or deformation of the spring mechanism. Use a contact resistance tester to test the contact resistance, ensuring it is within the standard range (≤50mΩ), and use a multimeter to check for open circuits or short circuits.
2. Installation & Wiring
Install the AS-03 CR2-A2 door lock contact on the dedicated mounting position of the door lock body, and fix it with matching screws. Note that the tightening torque should be appropriate (recommended 0.8-1.2 Nm) to avoid damaging the contact shell or affecting the movement of the internal spring mechanism. Ensure that the contact is aligned with the lock tongue—when the door is fully locked, the lock tongue should firmly press the contact to make it closed; when the door is opened, the contact should be quickly disconnected. According to the wiring diagram provided by Nanjing Zhuye Elevatorparts, connect the contact wires to the corresponding terminals of the door lock control circuit. The wire stripping length should be controlled at 4-6mm, and the connections should be firm and tight. After wiring, insulate the terminals with insulating tape to prevent short circuits. Finally, check the installation again to ensure there is no wrong connection, loose connection, or poor contact.
3. Debugging & Daily Use
After installation, restore the power supply and conduct systematic debugging. Manually open and close the elevator car door and landing door to check the switching status of the AS-03 CR2-A2 contact: when the doors are fully locked, the contact should be closed, and the elevator main controller should receive a “door locked” signal; when the doors are not fully locked or are abnormally opened, the contact should be disconnected, and the elevator should not start or should stop immediately. Use a multimeter to test the continuity of the contact during the door opening and closing process to ensure stable switching. During debugging, pay attention to adjusting the position of the contact if necessary to ensure perfect coordination with the lock tongue. In daily use, maintenance personnel should regularly inspect the door lock contact: clean the contact points and shell with a dry cloth or fine sandpaper (to remove oxidation layers), check the tightness of the screws and wiring terminals, and ensure the dust-proof cover is intact. Avoid violent collision or extrusion of the contact during maintenance to prevent damage to internal components.
Replacement Cycle of Elevator Door Lock Contact AS-03 CR2-A2
The replacement cycle of the AS-03 CR2-A2 elevator door lock contact is affected by factors such as usage frequency, working environment, and maintenance quality. Under normal use conditions—elevator operation time is 12-24 hours a day, the door opening and closing times per day are within 3000 times, and the elevator shaft is kept dry and well-ventilated—Nanjing Zhuye Elevatorparts recommends a replacement cycle of 4-6 years. This cycle is formulated based on a large number of field test data, fully considering the wear of contact points, the aging of spring mechanisms, the degradation of insulation performance, and the increase of contact resistance, which are the main factors affecting the safety performance of the contact.
For elevators in high-traffic areas such as shopping malls, airports, and subway stations, where the door opening and closing times per day exceed 8000 times, or in harsh environments with high humidity, heavy dust, high temperature, or strong corrosion (such as near chemical plants), the replacement cycle should be shortened to 2-4 years. High-frequency operation will accelerate the wear of contact points and springs, and harsh environments will easily cause corrosion and oxidation of the contact, affecting its safety performance. For elevators with low usage frequency, such as villa elevators and small office buildings with daily operation time less than 8 hours, if maintained properly, the replacement cycle can be extended to 6-8 years. However, it is necessary to arrange professional technicians from Nanjing Zhuye Elevatorparts to conduct semi-annual inspections on the door lock contact, including testing contact resistance, switching sensitivity, and component status.
Regardless of the service life, the AS-03 CR2-A2 door lock contact should be replaced immediately if any of the following problems occur: the contact resistance exceeds the standard range, leading to unstable signal transmission; the contact cannot be normally closed or disconnected, resulting in the elevator failing to start or stopping abnormally; the contact points are severely oxidized, burned, or worn; the shell is cracked or deformed, and the internal spring mechanism is damaged; the contact frequently fails, causing the elevator door lock system to alarm; the contact cannot pass the annual safety inspection. Timely replacement of the door lock contact is essential to avoid serious safety accidents such as elevator operation with doors open or passengers falling into the shaft.
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