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Digital safety gear architecture for modern elevator systems. Replaces braking device and mechanical overspeed governor.
Mechanics were standard for a long time - now they are becoming a weak point Mechanical braking devices and overspeed governors are still in use in many existing systems. However, new safety requirements and modernization cycles make it clear that these components are not only maintenance-intensive - they are also no longer fit for the future.
Our solution replaces mechanical elements with digital modules that function independently of the control system and can be seamlessly integrated into existing safety architectures. The result: more safety, less complexity - and a clear step towards a standard-compliant future.
- Intelligent safety gear management
- Electronic speed limiter
- Plug & Drive
- Self-sufficient system
- MODBOX - with emergency power supply
Safety rescaled - with digital overspeed governor and intelligent safety gear management
Digital safety gear architecture for modern elevator systems. Replaces braking device and mechanical overspeed governor.
Mechanics were standard for a long time - now they are becoming a weak point Mechanical braking devices and overspeed governors are still in use in many existing systems. However, new safety requirements and modernization cycles make it clear that these components are not only maintenance-intensive - they are also no longer fit for the future.
Our solution replaces mechanical elements with digital modules that function independently of the control system and can be seamlessly integrated into existing safety architectures. The result: more safety, less complexity - and a clear step towards a standard-compliant future.
Our components form a digital security architecture that intelligently networks the relevant functions.
From the digital overspeed governor to evaluation and intelligent catch triggering, the result is a system that not only complies with current standards, but also flexibly meets future requirements
A
Self-sufficient system Control-independent
Self-sufficient system that can be used as a retrofit kit for modernizing old (and modern) control systems.
C
Overspeed triggering ESG
Elimination of the mechanical overspeed governor: In the event of overspeed, the safety circuit is opened or the electromechanical safety gear is triggered directly by the PSU03 / SGT03.
D
Shelter maintenance in shield mode
When entering the shaft with a reduced shaft head/pit in accordance with EN 81-21, the maintenance shield mode is activated via the door release. A protective space is created to allow maintenance personnel to work safely.
E
Shelters Mounting Shield Mode
Shield mode installation ensures a protected space for personnel even before the elevator is put into operation. During installation, such as rail fastening, a protective space is created sequentially according to the installation progress. Depending on the position, the cabin is secured with a tolerance of ± 5 cm.
When mechanics are no longer enough
New TÜV regulations and stricter safety standards present elevator operators with a clear decision: Continue with outdated technology - or take the step into the digital future with Kübler LES03 / SGT03.
| Function 1) | Standard notes | SIL | LES03 / PSU03 Safe positioning system with safety catch release |
LES03 / PSU03 Safe positioning system |
LES03 / SGT03 Safety catch release |
LES03 / SGT03 Safety catch release with limit switch and interlock control |
|
|---|---|---|---|---|---|---|---|
| A | Self-sufficient system (independent of the elevator control system) | No standard reference | - | ✔ | ✔ | ✔ | ✔ |
| B | UCM (Unintentional car movement) | EN 81-20: 5.6.7.7 | 2 | ✔ | ✔ | - | - |
| C | Release of safety catch at overspeed | EN 81-20: 5.6.2.2.1 a), 5.6.6.10 | 3 | ✔ | - | ✔ | ✔ |
| Monitoring status of safety gear | EN 81-20: 5.6.2.1.5 | 1 | ✔ | - | ✔ | ✔ | |
| Reset function of the electromechanical safety gear | No standard reference | 3 | ✔ | - | ✔ | ✔ | |
| Release of safety catch when car moves upwards | EN 81-20: 5.6.6.5 | 2 | ✔ | - | ✔ | ✔ | |
| Safety catch triggered by emergency brake switch | No standard reference | 3 | ✔ | - | ✔ | ✔ | |
| Safety catch switch that opens the safety circuit | EN 81-20: 5.6.2.1.5, 5.6.6.5 EN 81-21: 5.5.2.3.3 f), 5.7.2.3.3 f) |
1 2 |
✔ | - | ✔ | ✔ | |
| Monitoring of the electrical reset device | EN 81-21: 5.5.3.2, 5.5.3.3 c), 5.7.3.2, 5.7.3.3 c) | 2 | ✔ | - | ✔ | ✔ | |
| Shield mode: Safety release with reduced shaft head/pit to create a personal protection space | EN 81-21: 5.5.2.3.1, 5.7.2.3.1 | 2 | ✔ | - | ✔ | ✔ | |
| D | Shield mode: Creation of protective space during scaffold-free assembly | No standard reference | 3 | ✔ | - | ✔ | ✔ |
| E | Absolute position feedback | No standard reference | 1 | ✔ | ✔ | ✔ | ✔ |
| F | Emergency limit switch | EN 81-20: 5.12.2.3.1 b) | 1 | ✔ | ✔ | - | ✔ |
| Inspection limit switch with reduced shaft head/pit | EN 81-21: 5.5.3.4, 5.7.3.4 | 2 | ✔ | - | ✔ | ✔ | |
| Functional safety right from wiring (without presetting) | No standard reference | 3 | ✔ | - | ✔ | ✔ | |
| Delay control (with shortened buffer stroke) | EN 81-20: 5.12.1.3 | 3 | ✔ | ✔ | - | ✔ | |
| Pre-tripping overspeed 115 % (pretripping) | EN 81-20: 5.6.2.2.1.6 a) | 2 | ✔ | ✔ | ✔ | ✔ | |
| Monitoring the speed in inspection mode (0.63 m/s) | EN 81-20: 5.12.1.5.1 e) | - | ✔ | ✔ | ✔ | ✔ | |
| Secure configuration management for accelerated approvals | No standard reference | - | ✔ | ✔ | ✔ | ✔ | |
| Monitoring access to the car roof or shaft pit | EN 81-21: 5.5.3.1, 5.7.3.1 | 3 | ✔ | ✔ | ✔ | ✔ | |
| Door bridging | EN 81-20: 5.12.1.4 a), b), c), 2), d) | 2 | ✔ | ✔ | - | - | |
| Door zone signaling for emergency release in 12 V emergency power mode | No standard reference | - | ✔ | ✔ | - | - | |
| Buffer batteries for emergency release with power supply unit for ESG | no standard reference | ✔ | - | ✔ | - |
Mechanics were yesterday - today digitalization begins with electronic overspeed governors
With intelligent safety gear management - The following components form the core of our solution: they replace the mechanical braking device and mechanical overspeed governor with intelligent, standard-compliant modules. All other safety functions remain the same. For comprehensive modernizations - each unit is designed to maximize reliability and installation comfort.
Compatible with all electromechanical safety gears from Cobianchi, Dynatech and Wittur.
Detects positions and security statuses precisely and tamper-proof.
Ensures standard-compliant, fast installation - even for retrofit projects.
Direct triggering of the electromechanical safety gear.
Preconfigured. Pre-wired. Thought ahead.
SGT03 including backup batteries and power supply unit
When it comes to safety-critical systems, it is not only the quality of the components that counts - but also how efficiently they can be integrated into existing systems. This is exactly where our MODBOX comes in: As a pre-assembled unit with pre-installed and pre-wired solutions, it reduces installation times, avoids interface errors and creates clarity in the project process.
Further concepts for our elevator solutions
Implementation of elevator and safety functions with intelligent safety gear management
Realization of elevator and safety functions without intelligent safety gear management
Security begins with trust.
As an industry manager for elevator technology, I am familiar with the challenges of implementing standards, modernization and digital safety architecture. I support you in setting up your projects in a structured, standard-compliant and future-proof manner.
Felix Baier
Industry Manager Elevator Technology
Make an appointment now
07.10.2025
∼ 2.87 MB
Safe shaft copying systems
07.10.2025
∼ 2.809 MB
Shaft copying systems - Sensors
