Description

Elevator safety limit switch SFD-MP5 Introduction

Product Name	Elevator safety limit switch
Model Number	SFD-MP5
Quality	Original.Brand New
Payment	T/T. Paypal. Western Union
Delivery	3-5 Working Days
Packaging	Packed by carton

Elevator Safety Limit Switch SFD-MP5 – Nanjing Zhuye Elevatorparts

The elevator car top emergency power supply is a critical safety component that ensures the elevator’s emergency systems (such as lighting, communication, and door opening) operate normally when the main power supply fails. The Elevator Car Top Emergency Power Supply DJW12-4.5/7.0 provided byNanjing Zhuye Elevatorparts is a high-reliability power supply device tailored for mainstream elevator systems. It supports two capacity specifications (4.5Ah and 7.0Ah) to meet the needs of different elevator models, widely compatible with brands such as Schindler, OTIS, and KONE. Crafted with high-performance lithium-ion batteries, intelligent charging management modules, and flame-retardant casings, this emergency power supply meets international elevator safety standards (EN 81-20, GB 7588) and has become a trusted choice for global elevator maintenance teams and manufacturers.

The elevator leveling system is a key component that ensures the elevator car aligns accurately with the floor, providing safe and comfortable access for passengers. The elevator leveling sensor serves as the “eye” of this system, detecting the car’s position in real time. The Elevator Leveling Sensor TNC-121 provided by Nanjing Zhuye Elevatorparts is a high-precision position-sensing component tailored for mainstream elevator systems. It is widely compatible with elevator brands such as Schindler, OTIS, and KONE, suitable for both passenger and freight elevators. This sensor adopts advanced photoelectric sensing technology, featuring high detection accuracy, fast response speed, and strong anti-interference ability, ensuring the elevator stops stably and accurately at each floor. Crafted with high-quality optical components, sealed metal shells, and precision electronic circuits, it meets international elevator safety standards (EN 81-20, GB 7588) and has become a trusted choice for global elevator maintenance teams and manufacturers.

The elevator lock is a core safety component that ensures the elevator car door and landing door remain locked during operation, preventing accidental opening and ensuring passenger safety. The Elevator Lock CV50 180 JK406-001 provided by Nanjing Zhuye Elevatorparts is a high-reliability safety lock tailored for mainstream elevator systems. It is widely compatible with elevator brands such as Schindler, OTIS, and KONE, suitable for both passenger and freight elevators. This elevator lock integrates precise mechanical structure and stable electrical control, achieving reliable locking when the elevator is running and smooth unlocking when it reaches the floor. Crafted with high-strength alloy steel, flame-retardant plastic, and precision electronic components, it meets international elevator safety standards (EN 81-20, GB 7588) and has become a trusted choice for global elevator maintenance teams and manufacturers.

The elevator’s electrical control system is prone to arc generation during switch-on and switch-off of contacts, which may cause damage to electrical components or even fire hazards. The elevator arc extinguisher serves as a “safety barrier” to suppress and eliminate arcs. The Elevator Arc Extinguisher HD1.211 provided by Nanjing Zhuye Elevatorparts is a high-performance arc suppression component tailored for elevator electrical systems. It is widely compatible with mainstream elevator brands such as Schindler, OTIS, and KONE, suitable for arc suppression of elevator contactors, relays, and other electrical contacts. Crafted with high-quality arc-extinguishing materials, flame-retardant shells, and precision structural design, this arc extinguisher meets international electrical safety standards (IEC 60947, GB/T 14048) and has become a trusted choice for global elevator maintenance teams and manufacturers.

The elevator door operator is the “power core” of elevator door opening and closing, and the door operator belt serves as a critical transmission component that connects the motor and door pulley system. The Elevator Door Operator Belt L075 provided by Nanjing Zhuye Elevatorparts is a high-performance transmission belt tailored for mainstream elevator door operator systems. It is widely compatible with elevator brands such as Schindler, OTIS, and KONE, playing a vital role in ensuring smooth, quiet, and stable operation of elevator doors. Crafted with high-strength polyurethane (PU) material and embedded with high-tensile polyester cords, this belt features excellent wear resistance, tensile strength, and flexibility, meeting international elevator safety standards (EN 81-20, GB 7588) and becoming a trusted choice for global elevator maintenance teams and manufacturers.

The elevator safety limit switch is a critical protective component that prevents overtravel of the elevator car, and its stable operation is closely linked to the door machine pulley system (composed of drive and driven pulleys). The Elevator Safety Limit Switch SFD-MP5 launched by Nanjing Zhuye Elevatorparts is a high-reliability safety component tailored for mainstream elevator systems. It is widely compatible with renowned elevator brands such as Schindler, OTIS, and KONE, accurately triggering emergency stop signals when the elevator approaches the upper or lower limit, and coordinating with the door machine pulley system to stop door operation immediately. Crafted with high-strength metal shells, precision contact mechanisms, and anti-corrosion components, this limit switch meets international elevator safety standards (EN 81-20, GB/T 7025) and has become a trusted choice for global elevator maintenance teams and manufacturers.

Nanjing Zhuye Elevatorparts has always adhered to the concept of “quality first, safety-oriented,” implementing strict quality control throughout the production process of the SFD-MP5 safety limit switch. Each unit undergoes rigorous testing, including contact on-off performance verification, mechanical durability testing, environmental adaptability assessment, and corrosion resistance testing. The high-strength metal shell can withstand strong impact forces during elevator emergency stops, ensuring structural integrity. The precision contact mechanism adopts a snap-action design, with a response time of less than 0.1 seconds, ensuring timely signal transmission to cut off the elevator’s running power. The switch can work stably in a temperature range of -20℃ to 70℃ and has an IP65 dustproof and waterproof rating, adapting to the harsh operating environment of elevator shafts. Its mechanical service life exceeds 1 million operations, ensuring long-term reliable performance.

Usage Guide for Elevator Safety Limit Switch SFD-MP5

Correct installation, debugging, and maintenance of the SFD-MP5 safety limit switch are crucial to ensuring elevator overtravel protection and coordinated operation with the door machine pulley system. Nanjing Zhuye Elevatorparts emphasizes that only certified elevator maintenance technicians are allowed to perform installation and replacement operations.

1. Pre-Installation Preparation

First, confirm that the elevator’s MAC car lighting controller model matches the POWCV24181MH power supply (check parameters such as input voltage, output voltage, output current, and installation dimensions). Consult Nanjing Zhuye Elevatorparts’ technical team if there is any uncertainty about compatibility. Then, cut off the elevator’s main power supply and the secondary power supply for the car lighting system, lock the switch, and place a “Maintenance in Progress” warning sign at the elevator landing doors and machine room entrance. Locate the power supply installation position (usually on the car top or in the car control cabinet) and clean the area to remove dust, debris, and oil stains. Finally, prepare professional tools such as a screwdriver, wire stripper, multimeter, and insulation tester, and check that the new POWCV24181MH power supply from Nanjing Zhuye Elevatorparts is intact (no damage to the shell, no loose pins).

First, confirm that the elevator model and limit switch installation position match the SFD-MP5 switch (check parameters such as installation dimensions, contact type, and action stroke). Consult Nanjing Zhuye Elevatorparts’ technical team if there is any uncertainty about compatibility. Then, cut off the elevator’s main power supply and control system power supply, lock the switch, and place a “Maintenance in Progress” warning sign at the machine room entrance and shaft access door. Use a hoist to fix the elevator car at a safe position to expose the upper and lower limit switch installation areas. Finally, prepare professional tools such as a screwdriver, wrench, multimeter, and measuring tape; clean the installation position and connecting terminals, and check the door machine’s drive and driven pulleys for normal operation (abnormal pulley operation may affect elevator stopping accuracy).

2. Installation & Wiring

If replacing old limit switches, first take photos to record their installation position, action arm angle, and wiring connections for later reference. Disconnect the wires from the old switches according to the recorded labels and remove the old switches. Take the new SFD-MP5 switches from Nanjing Zhuye Elevatorparts, install them on the preset brackets (ensure the action arm is aligned with the elevator’s collision block), and fasten them firmly with screws. Adjust the action stroke of the switch using the adjusting bolt—ensure the switch is triggered accurately when the elevator reaches the limit position. Connect the wires to the corresponding terminals strictly following the photos and the wiring diagram provided by Nanjing Zhuye—distinguish between normally open and normally closed contacts to avoid wrong connection. After wiring, use a multimeter to test the contact on-off performance to confirm normal signal transmission.

Debugg3. Operation & Daily Maintenance

Remove the hoist fixing the car, restore the power supply, and switch the elevator to inspection mode. Operate the elevator to slowly approach the upper and lower limit positions, observing whether the SFD-MP5 switch is triggered accurately and the elevator stops immediately. Check if the door machine pulley system stops door operation synchronously with the elevator stop—no delay or misoperation is allowed. After 1 hour of stable operation, check the switch’s temperature and wiring terminals (no abnormal heat or loose wires). For daily maintenance, inspect the switches during monthly shaft patrols: Check for loose bolts, deformation of the action arm, and oxidation of contacts; clean the switch surface and action arm with a dry cloth. At the same time, check the door machine pulley system’s operation—abnormal pulley wear may cause inconsistent elevator stopping positions and affect the switch’s triggering accuracy. Every 3 months, recheck the switch’s action stroke and contact performance; every 6 months, lubricate the switch’s moving parts with special lubricant.

Replacement Cycle of Elevator Safety Limit Switch SFD-MP5

The replacement cycle of the SFD-MP5 safety limit switch is closely related to operating conditions and the frequency of door machine pulley operation. Under normal circumstances (elevator daily operation 12-24 hours, shaft environment dry and low-dust, no frequent impact), Nanjing Zhuye Elevatorparts recommends a replacement cycle of 3-5 years. This cycle is determined based on long-term field operation data and component aging tests, fully considering the wear of the action arm, contact fatigue, and shell corrosion.

For elevators in high-traffic areas (e.g., large shopping malls, airports with daily operation ≥ 20 hours) or harsh environments (shaft with high humidity, heavy dust, frequent vibration), the replacement cycle should be shortened to 1.5-2 years. High-frequency operation accelerates the wear of the switch’s moving parts, while harsh environments easily cause component corrosion and jamming. For low-usage elevators (e.g., villa elevators, small office buildings with daily operation time < 8 hours) in stable environments, the cycle can be extended to 5-7 years, but only after inspection and confirmation by Nanjing Zhuye’s technicians that the switch’s performance and coordination with the door machine pulley system meet standards.

Replace the switch immediately if any of the following issues occur, regardless of its service life: The switch fails to trigger or is triggered incorrectly, causing the elevator to overtravel; the action arm is deformed or broken, affecting normal operation; the contacts are severely oxidized or burned, resulting in unstable signal transmission; the shell is severely corroded or damaged, losing protection performance; the switch cannot coordinate with the door machine pulley system normally, leading to door operation faults after elevator stop.

The Elevator Safety Limit Switch SFD-MP5 from Nanjing Zhuye Elevatorparts integrates high reliability, durability, and strong compatibility, providing a critical overtravel protection guarantee for elevators and ensuring coordinated operation with the door machine pulley system. By following the correct usage, maintenance, and replacement guidelines, you can effectively prevent elevator overtravel accidents, ensure the safe operation of the elevator, and protect the safety of passengers and equipment. Choosing Nanjing Zhuye Elevatorparts means you get 100% authentic SFD-MP5 safety limit switches, as well as professional services including model matching, on-site installation guidance, and timely after-sales support. Trust Nanjing Zhuye Elevatorparts for the stable and safe operation of your elevator.

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