The Pull-Wire Emergency Stop Switches by Schmersal are engineered to deliver reliable emergency shutdown across extended machine layouts where traditional emergency stop buttons may not be easily accessible. These switches are widely used in conveyor belts, production lines, and large industrial systems.
A tensioned wire (rope) is installed along the length of the machine. When the wire is pulled, slackened, or broken, the switch is activated and immediately interrupts the control circuit, stopping the machine to prevent accidents or damage.
One of the key advantages of this system is that the emergency stop can be triggered from any point along the wire, providing full-length safety coverage—something not possible with standard pushbutton E-STOP devices.
Schmersal pull-wire switches are available in various series such as ZQ, RS, and TQ, offering both one-side and two-side operation. Depending on the model, they support wire lengths ranging from 10 m up to 2 × 100 m, making them suitable for small machines as well as large industrial installations.
These switches feature wire pull and breakage detection, ensuring that both emergency activation and cable faults are reliably identified. Once activated, a latching mechanism holds the stop command until the device is manually reset, ensuring controlled restart only after the issue is resolved.
Built with robust metal, thermoplastic, or stainless-steel enclosures, and protection ratings up to IP66/IP67, these switches are designed for harsh industrial environments, including dust-prone and outdoor applications.
With high safety performance (up to PL e as per EN ISO 13849-1), these devices provide dependable protection for both personnel and equipment in demanding automation systems.
Key Features & Specifications
• Emergency stop activation from any point along the wire
• Wire pull and breakage detection for enhanced safety
• One-side or two-side operation options (up to 2 × 100 m wire length)
• Latching mechanism with manual reset for safe restart
• Mechanical position indicator for clear status monitoring
• Robust housing options (metal, thermoplastic, stainless steel)
• High protection ratings (IP66/IP67) for harsh environments
• Large wiring compartment for easy installation
• Integrated release/reset push button
• Available in explosion-proof (Ex) variants for hazardous areas
• Compliant with IEC/EN 60947-5-5 and EN ISO 13850 safety standards
• Compatible with PLC, safety relays, and automation systems
Applications
Pull-Wire Emergency Stop Switches by Schmersal are widely used in:
• Conveyor belt and bulk material handling systems
• Mining, cement, and steel industries
• Power plants and heavy industrial facilities
• Packaging and processing lines
• Warehousing and logistics systems
• Large-scale automated production environments
The Pull-Wire Emergency Stop Switches by Schmersal provide a highly effective safety solution for extended machinery, ensuring instant emergency response, full-length protection, and reliable operation in demanding industrial environments.
