BST S200 Landing Door Lock K200 K300

Safety Lock System for Elevator Landing Doors

Product Overview

The BST S200 Landing Door Lock K200 K300 is a safety locking component used in elevator landing door systems. It ensures that the landing door remains securely closed unless the elevator car is correctly positioned at the floor.

In practical applications across regions such as Turkey and Brazil, these lock models are commonly used in elevator systems where reliable door interlocking is essential for safe operation. Because the locking mechanism is directly connected to the safety circuit, it plays a critical role beyond simple mechanical function.

Different models such as S200, K200, and K300 are selected based on door configuration and system requirements.

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Role in Safety System

The landing door lock is part of the elevator safety chain.

Its main functions include:

• preventing door opening when the car is not at the floor
• ensuring proper locking before elevator movement
• sending safety signals to the control system
• supporting coordinated operation with the door cam

Without a properly functioning lock, elevator operation is not permitted.

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Model Variants

The S200 / K200 / K300 series typically represent:

• different installation configurations
• varying structural designs
• compatibility with specific door systems

In maintenance work, selecting the correct model is essential to ensure proper alignment and safety function.

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System Integration

The landing door lock works together with:

• door cam (mechanical unlocking)
• landing door structure
• control system safety circuit
• car door movement

The lock is only released when the cam engages at the correct position.

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Application Context

These lock models are commonly used in:

• passenger elevators
• residential and commercial buildings
• maintenance and replacement projects
• systems requiring reliable door interlock

In markets such as Turkey, landing door locks are often replaced during safety inspections to maintain compliance and operation reliability.

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Performance Characteristics

In real-world use, a proper landing door lock ensures:

• secure door closure
• accurate unlocking timing
• stable safety signal transmission
• consistent operation under repeated cycles

Because of its safety function, reliability is more important than mechanical complexity.

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Maintenance and Replacement

Technicians may inspect or replace the lock when:

• door fails to lock properly
• elevator does not start due to safety circuit issues
• unlocking becomes inconsistent
• visible wear or misalignment appears

Correct model matching is essential during replacement.

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Practical Notes

From a service perspective:

• landing door locks are safety-critical components
• incorrect models may affect system operation
• installation alignment directly affects performance

This makes them more important than typical mechanical parts.

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Frequently Asked Questions

What is the BST S200 / K200 / K300 door lock used for?
It is used to secure elevator landing doors and ensure safe operation.

Is it a safety component?
Yes, it is part of the elevator safety system.

Can different models be used interchangeably?
No, the correct model should be selected based on system requirements.