Safety Door Switch Robust Switch Solution For Safeguarding Access Points On

Product Overview

The VSDP series mechanical safety interlock switch is a robust guard interlocking device complying with ISO14119, designed for movable protective guards on general industrial machinery. Built with forced disconnection structure, it ensures reliable safety circuit cut-off when the safety door is opened, eliminating hidden risks caused by contact welding. Multiple contact combinations are optional to match different safety control requirements. Compact structure, high voltage rating and IP67 protection make it a popular economical alternative to European brands mechanical safety switches.

Key Benefits

✅ Forced Disconnection Design (Core Safety Feature) Mandatory forced separation ≥10mm, ≥60N detachment force. Guarantees the safety contacts will definitely open even if contacts are welded shut, meets strict machinery safety standards.
✅ Rich Contact Options for Flexible Matching 5 contact configurations available: 1NC+1NO /1NC /2NC /2NC+1NO /3NC, adapt to Cat.1~Cat.3 safety circuits, flexible for simple & medium safety applications.
✅ High Voltage & Strong Durability 400V rated operational voltage, 4KV impulse withstand voltage, PA66 flame-retardant housing, silver alloy gold-plated contacts, over 1 million mechanical operation cycles.
✅ IP67 Protection Grade IP67 rating (except key operation hole), works stably in dusty, humid, oil-spattered factory environments.
✅ Cost-Effective Drop-In Replacement Same working principle and wiring logic as mainstream mechanical safety interlocks from Schmersal, Euchner, Pilz, easy replacement for existing equipment renovation and new machine projects.

Model Code Definition

VSDP - □□ ① Switch Contact Type

• C0: 1NC + 1NO
• C1: 1NC
• C2: 2NC
• C3: 2NC + 1NO
• C4: 3NC

Full Available Models

Technical Specifications

Model Variations

Contact Action & Working Principle

The VSDP is an actuator-key operated mechanical safety switch. When the operating key is fully inserted into the switch, the contacts switch status; once the key is pulled out (safety guard opened), the forced separation mechanism immediately breaks the safety circuit. Different contact combinations support different signal feedback schemes for safety relays and PLC control. Complete wiring diagrams are provided for engineering design.

Typical Applications

Suitable for mechanical safety guard interlock on general automation equipment: ✅ General CNC equipment ✅ Conveyor & automated assembly lines ✅ Packaging machinery ✅ Woodworking / textile machinery ✅ Small automated workstations ✅ Retrofit upgrade of old machine safety systems

Compliance

Conforms to ISO14119 (Interlocking devices associated with guards), applicable for Category 1 / 2 / 3 safety systems per EN ISO 13849-1.

Product Images

Package & Support

• Supplied with standard actuator key
• Datasheet, wiring diagram available on request
• Custom laser marking & bulk order support
• 12-month factory warranty

FAQ

Q: What is forced disconnection? A: It is a mandatory safety structure. When the safety door is opened, the mechanical structure forcibly separates the contact points, even if contact welding occurs, the circuit can still be reliably cut off, which is the core requirement for machine safety switches.
Q: What is the difference between VSDP and VSD-K6? A: VSDP is a pure mechanical safety interlock (no electromagnetic locking function), for low & medium safety level. VSD-K6 is electromagnetic guard locking safety switch, with solenoid lock/unlock and 6 sets of contacts, for high safety level PL e / Cat.4 scenarios.
Q: Can VSDP replace Schmersal / Euchner mechanical safety switches? A: Yes, same forced separation safety principle and contact logic, widely used as economical replacement.