Safety System Bus Integration for Door Lock Control
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Solution Overview
Problem
Existing security systems for controlling and monitoring door locks for escape routes lack integration of non-security-relevant functions and unclear connections between control centers, emergency buttons, and door locks.
Innovation Solution
A security system that includes a control device connected to both the triggering element and door locking control via a bus system, allowing for communication with other bus participants and enabling non-safety-relevant functions such as time-delayed unlocking, automatic relocking, and integration with access control systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a bus system is used to connect the emergency button and door lock, then communication efficiency is improved, but it becomes unclear how non-safety functions can be integrated
Solution Approach 1:
The bus system is designed to handle both safety-critical communications (emergency button signals) and non-safety functions (access control, monitoring) through a unified communication protocol. The control device can differentiate between signal types and route them appropriately, allowing the same physical bus infrastructure to support multiple functional domains without interference.
2Adaptability or versatility
If a control device is added to manage non-safety functions, then system versatility is improved, but system complexity increases
Solution Approach 1:
The control device is integrated into the existing door lock control unit, combining safety-critical control functions with non-safety functions (access control, time-delayed unlocking, automatic relocking) into a single centralized controller. This eliminates the need for separate control hardware and reduces overall system complexity while maintaining full functionality.
Solution Approach 2:
The control device is designed as a multi-functional unit that can handle both safety-critical emergency release operations and non-safety functions such as access control authentication, time-delayed unlocking sequences, and automatic relocking. The single control device adapts its behavior based on the type of signal received, eliminating the need for multiple specialized controllers.
3Adaptability or versatility
If multiple functions are integrated into the safety system, then system capability is improved, but reliability may be compromised
Solution Approach 1:
The control device implements functional segmentation through dedicated processing routines that separate safety-critical operations from non-safety functions. Emergency button signals are processed through a dedicated safety protocol that is independent of access control or other non-safety operations, ensuring that failures in non-safety functions cannot compromise safety reliability.
Solution Approach 2:
The control device acts as an intermediary between the emergency button and the door lock mechanism, implementing a layered architecture where safety-critical signals are processed through a dedicated safety layer. This intermediary structure allows non-safety functions to operate simultaneously without interfering with the direct safety signal path, maintaining reliability while enabling extended functionality.
Data Source
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AI summary
The invention relates to a safety system (1) for controlling and/or monitoring at least one door lock (200) for securing escape routes, comprising at least one release element (10), in particular an emergency button (10), and a door lock control (201) for controlling a locking mechanism (205), wherein the release element (10) and the door lock control (201) are connected to each other via a first bus system (400). According to the invention, the safety system (1) comprises a control device (100), wherein the control device (100) is connected to the release element (10) and/or to the door lock control (201) via the first bus system (400).