Description
ALSTOM STO1726KO1 Safety Torque Off (STO) Safety Control Module Product Description
Product Overview
ALSTOM STO1726KO1 is a safety control module designed for functional safety applications in railway transportation systems, industrial drive systems, and critical automation equipment. As a dedicated Safety Torque Off (STO) interface component, ALSTOM STO1726KO1 provides a reliable method for safely interrupting motor torque generation by disabling the power output stage when emergency stop conditions, safety chain interruptions, or abnormal operating conditions are detected. The module is designed to improve personnel protection and equipment safety while maintaining high system availability.
The ALSTOM STO1726KO1 operates as a safety-related interface between the control system and power electronics section of traction converters, industrial drives, or auxiliary drive systems. It receives safety commands from emergency circuits or safety controllers and rapidly removes the enable signal from the power conversion stage, preventing uncontrolled motor movement. Through redundant safety channels, monitoring functions, and electrical isolation technology, ALSTOM STO1726KO1 helps achieve dependable shutdown behavior in safety-critical environments.
As part of ALSTOM’s railway and industrial automation product portfolio, ALSTOM STO1726KO1 is widely applied in traction control systems, railway electrical equipment, industrial machinery safety circuits, and high-reliability automation installations. Its compact modular design, fast safety response capability, and compatibility with ALSTOM control architectures make it an important component for maintaining safe operation and extending the lifecycle of existing automation and transportation systems.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | STO1726KO1 |
| Manufacturer | ALSTOM |
| Product Type | Safety Torque Off (STO) Module |
| Main Function | Safe shutdown of drive torque output |
| Safety Function | Emergency torque interruption / drive disable |
| Input Voltage | 24 VDC ±10% (typical) |
| Output Type | Safety semiconductor output / isolated switching interface |
| Safety Channels | Dual-channel safety input architecture |
| Response Time | ≤10 ms (application dependent) |
| Isolation Voltage | Electrical isolation between control and power circuits |
| Safety Standard | IEC 61508 / EN 50129 related safety applications |
| Diagnostic Function | LED status indication and fault monitoring |
| Installation Method | Control cabinet modular mounting |
| Operating Temperature | Industrial railway environment range |
| Application Field | Railway traction, industrial drives, safety automation |
Main Features and Advantages
Advanced safety shutdown function:
The main advantage of ALSTOM STO1726KO1 is its ability to provide a reliable Safe Torque Off function for drive and traction applications. Instead of mechanically disconnecting power circuits, the module electronically disables the drive control path, allowing rapid interruption of torque generation while maintaining system integrity. This approach improves response speed and reduces wear compared with traditional mechanical switching solutions.
Dual-channel safety architecture:
ALSTOM STO1726KO1 is designed with safety-oriented redundant input processing. The dual-channel structure improves fault detection capability and reduces the risk of unsafe operation caused by single-point failures. This design philosophy supports applications where functional safety and predictable shutdown behavior are essential.
STO1726KO1
Fast emergency response capability:
In critical situations, rapid system response is required to protect operators, passengers, and equipment. ALSTOM STO1726KO1 provides fast safety signal processing, enabling quick removal of drive enable conditions when emergency stop commands or safety faults occur.
Electrical isolation and interference resistance:
Railway and industrial environments often contain significant electrical noise and voltage disturbances. ALSTOM STO1726KO1 incorporates electrical isolation technology between control circuits and power interfaces, improving electromagnetic compatibility and protecting sensitive control components from field-side interference.
Reliable integration with automation systems:
ALSTOM STO1726KO1 can be integrated into ALSTOM control architectures and safety systems to provide a dedicated safety interface. It works together with controllers, traction converters, drive systems, and monitoring modules to create a complete safety protection chain.
Compact modular construction:
The modular design of ALSTOM STO1726KO1 allows convenient installation inside control cabinets and electrical equipment compartments. The compact structure simplifies system integration, replacement, and maintenance operations, reducing downtime during service activities.
High reliability for demanding environments:
Transportation and industrial applications require continuous operation under vibration, temperature changes, and electrical disturbances. ALSTOM STO1726KO1 is designed for demanding environments, providing stable safety performance throughout long operational periods.
Application Areas
Railway Traction Systems:
ALSTOM STO1726KO1 is widely used in railway traction control systems where safe interruption of motor torque is required. It can be integrated into traction converters and drive cabinets to provide emergency shutdown functions for electric trains, metro vehicles, and railway auxiliary systems.
Metro and Urban Transit Equipment:
Modern metro systems require highly reliable safety mechanisms to protect passengers and maintenance personnel. ALSTOM STO1726KO1 supports safe operation of traction and auxiliary drive systems by providing dependable torque shutdown functionality.
Industrial Motor Drive Systems:
In industrial automation applications, ALSTOM STO1726KO1 can be used in machinery requiring safety-controlled motor shutdown. It supports emergency stop circuits, maintenance protection functions, and machine safety architectures.
Power Electronics Control Systems:
Large converters, inverters, and drive systems require reliable safety interfaces between control logic and power stages. ALSTOM STO1726KO1 provides the necessary isolation and shutdown control for high-reliability power electronics applications.
Railway Maintenance and Retrofit Projects:
For existing ALSTOM transportation systems, ALSTOM STO1726KO1 serves as an important replacement component. It allows operators to maintain safety functions while extending the service life of installed traction and control equipment.
Critical Industrial Infrastructure:
Applications such as energy systems, heavy machinery, and automated production equipment benefit from the safety capabilities provided by ALSTOM STO1726KO1, improving operational safety and reducing risks associated with uncontrolled movement.
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