The ALSTOM STO1726KO1 is an advanced safety torque off (STO) module designed for integration within industrial drive systems, providing reliable motor shutdown functionality in emergency situations. As part of ALSTOM’s safety solutions portfolio, this compact module meets SIL 3/PLe safety standards while maintaining minimal footprint in drive cabinets.
With its dual-channel architecture and fail-safe design, the STO1726KO1 ensures immediate power interruption to motors when activated, preventing unintended restart and protecting personnel during maintenance operations. Its universal compatibility makes it suitable for retrofitting existing drives or integrating into new automation systems across various industries.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Model | STO1726KO1 |
| Manufacturer | ALSTOM |
| Type | Integrated Safety Torque Off Module |
| Safety Standard | SIL 3, PLe, Cat.4 |
| Response Time | <20ms |
| Operating Voltage | 24V DC (18-30V range) |
| Contact Rating | 5A @ 230V AC |
| Isolation | 2500V AC (input to output) |
| Operating Temperature | -25°C to +60°C |
| Dimensions | 45mm × 30mm × 15mm |
| Weight | 80g |
| Certifications | UL, CE, TÜV |
Key Features and Advantages:
Safety assurance: The STO1726KO1 utilizes redundant semiconductor switching technology with continuous self-monitoring, ensuring reliable operation even in case of single component failure. Its cross-fault detection capability prevents unsafe conditions while minimizing nuisance trips.
Easy integration: Featuring screw terminal connections and DIN rail mounting, the module simplifies installation in both new and retrofit applications. The built-in status indicators provide clear visual feedback of operational state and fault conditions.
Application Areas:
- Manufacturing: Emergency stop circuits for robotic cells and assembly lines
- Material Handling: Conveyor system safety interlocks
- Packaging: Protection during machine jam clearing
- Metal Processing: Safe access to press brakes and shears
Related Products:
- ALSTOM AL129A high-performance communication module
- ALSTOM CMP1838 TRVCO62345000 process control module
- SIL1726KO1: SIL 3 certified safety interlock module
- ALSTOM DSI1817 TRVC062335000 Data transmission module
- STO1726KO1-F: Factory-sealed version for harsh environments
Installation and Maintenance:
Installation preparation: Verify drive compatibility and available mounting space before installing the STO1726KO1. Ensure proper clearance (minimum 10mm) around the module for heat dissipation and maintenance access.
Maintenance recommendations: Perform annual functional testing of the STO circuit using ALSTOM’s SFT-100 tester. Regularly inspect terminal connections for proper torque and signs of overheating.
Product Assurance:
ALSTOM provides 12-month warranty coverage for the STO1726KO1, including free technical support and advance replacement for defective units. Each module undergoes 100% functional testing and burn-in before shipment.
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