ZS 711O/1SVD Schmersal industrial pull-wire emergency stop switch
Key Features & Specifications

• Enclosure: Durable metal housing built for harsh industrial environments. 
• Operation: One-side operation supporting wire lengths up to 20 meters. 
• Safety Functions: Integrated wire-pull and wire-breakage detection (compliant with EN ISO 13850 and IEC 60947-5-5). 
• Contacts: Features 2 contacts (typically 1 NC / 1 NO configuration); positive-opening normally closed (NC) safety contacts. 
• Reset Mechanism: Manual push-button release (VD suffix) to rearm the switch after activation. 
• Environmental Rating: IP65 protection class, resistant to dust and water jets. 

If you are planning an installation or replacement, please tell me:

• The required wire span length for your conveyor or machinery area
• The operating environment (temperature extremes, dust, or moisture levels)
• Your preferred contact configuration or reset type

I can help verify compatibility or suggest proper accessories like tension springs and wire ropes.