Schmersal ZQ 900-22 | Metal Rope Pull E-Stop, 2NO+2NC, IP67

Schmersal ZQ 900-22 industrial pull-wire emergency stop switch. Zinc die-cast housing, 2 safety NC + 2 auxiliary NO contacts, 75m max wire length, IP67, EN ISO 13849-1.

Product Overview

The Schmersal ZQ 900-22​ is a metal-cased pull-wire emergency stop switch​ designed for long conveyor lines and machinery perimeter protection. It features a robust zinc die-cast housing, 2 positively driven safety NC contacts, and 2 auxiliary NO contacts. With a maximum wire length of 75 meters​ and IP67 protection, it is built for harsh industrial environments requiring reliable emergency stop functionality.

Technical Specifications (Electrical & Functional)

Technical Specifications (Mechanical & Environmental)

Key Features

• Robust Metal Construction:​ The zinc die-cast housing​ provides high mechanical strength and impact resistance, making it suitable for heavy industry, mining, and outdoor applications.

• Long-Range Protection:​ Supports up to 75 meters of pull-wire length​ (with intermediate supports), allowing for extensive coverage along conveyor belts or production lines.

• Integrated Reset & Indication:​ Features a release push-button​ for easy reset after activation and a position indicator​ for visual status monitoring of the wire tension.

• High Safety Integrity:​ The 2 safety NC contacts​ are designed with positive break action, ensuring reliable opening of the safety circuit even under contact welding conditions, compliant with EN ISO 13849-1.

Applications

• Conveyor Systems:​ Emergency stop activation along long conveyor belts in logistics, parcel sorting, and material handling.

• Machine Guarding:​ Perimeter safety for large presses, automated assembly lines, and robotic cells.

• Harsh Environments:​ Washdown areas, foundries, and outdoor installations where dust, moisture, and mechanical stress are present.