In modern automated manufacturing, movable safety guards are essential barriers separating operators from hazardous machine movements. Schmersal mechanical safety door switches serve as core interlocking components to monitor the closed status of hinged, sliding and removable protective doors. Fully compliant with EN ISO 14119, EN ISO 13849-1 and IEC 60947-5-1, these electromechanical devices adopt a split design with separate actuators. When the safety door is opened, built-in positive-break safety contacts immediately cut off the safety circuit and trigger machine shutdown, preventing accidental start-up and eliminating severe safety risks.
The AZ and AZM Series
Schmersal’s mechanical safety door switches mainly cover the classic AZ series non-latching safety switches and heavy-duty AZM solenoid interlock safety switches. The AZ range focuses on position monitoring for standard guard doors, while AZM electromagnetic interlock variants provide powerful locking force to stop doors from being opened during machine operation. Multiple housing options are available, including glass-fibre reinforced thermoplastic and die-cast metal enclosures. Standard models achieve Category 3 / PL d, and high-specification versions can reach Category 4 / PL e, matching the safety requirements of high-risk machinery.
Mainstream Models
The following mainstream AZ and AZM safety door switch models are available:
- AZ16-02ZVK-M16
- AZ16-12ZVRK-M16
- AZ17-02ZRK-ST
- AZ215-02ZVK
- AZ315-12ZRK
- AZ201-B30-RTAG1P1
- AZM161SK-12/12RKA-M16-24V
- AZM201SK-T-1P2P
- AZM201CC-T-SD2PA
- AZM415-33ZPDKE 24VAC/DC
- AZM415-11/11ZPKT 24VAC/DC
- AZ16ZI-02ZVK (High-coding anti-tamper model)
- AZM150-ST-1P2PW
- AZ216-12ZVK
- AZM300Z-I2-ST2
- EX-AZ16-02ZVRK (Explosion-proof variant)
- EX-AZM415-ZPKT
- AZ15-02ZVK
- AZM201ST1-T-1P2PWA
- AZ215-02ZRK
Core Advantages
- First, mandatory positive-break contact design guarantees functional safety. Unlike ordinary limit switches, Schmersal mechanical safety door switches utilise mechanical force to forcibly disconnect safety NC contacts. Contact welding cannot disable the safety function, meeting international machinery safety standards. Combined with Schmersal SRB safety relay modules, they construct certified safety circuits for CE machinery approval.
- Second, flexible modular design supports diverse installation scenarios. Detachable actuators accept multi-direction insertion; actuator heads can rotate 360° to adapt to sliding doors, hinged doors and double-door systems. Customers select multiple contact configurations (1NO+1NC, dual safety NC contacts) to realise simultaneous safety interlock and signal feedback. Emergency escape release options are available for AZM interlocks to prevent personnel from being trapped inside hazardous zones.
- Third, robust construction delivers outstanding environmental resistance. Standard protection rating reaches IP67, with optional IP69K hygienic versions for food and pharmaceutical workshops. Thermoplastic housings resist welding sparks, oil and coolant; metal housing variants withstand strong impact for port and mining equipment. ATEX-certified explosion-proof models are offered for chemical and dust-hazard environments.
- Fourth, powerful anti-manipulation performance. High-coded actuator variants comply with EN ISO 14119, preventing bypass by simple substitutes. Long mechanical service life exceeds one million operating cycles, ideal for high-frequency door switching on automated production lines. Multiple wiring forms including cable glands and M12 plug connectors simplify on-site wiring.
- Fifth, complete global certification system. All products carry CE, cULus and CCC certifications. Standardised dimensions facilitate unified spare parts management for machinery manufacturers, and seamless compatibility with safety relays, safety controllers and AS-i Safety bus systems enables convenient integration into smart factory networks.
Wide Application Industries
Schmersal mechanical safety door switches are widely deployed across numerous sectors: CNC machine tools, stamping and injection moulding equipment, robot workcells, lithium battery production lines, automotive welding workshops, automated packaging machinery, logistics warehousing systems, food & pharmaceutical processing equipment, printing machinery, mining conveying systems, port lifting equipment, metallurgical production lines and chemical explosion-proof facilities. Typical applications include monitoring of equipment maintenance doors, robot cell perimeter guards and access interlock control of large industrial enclosures.
Conclusion
Safety is the foundation of sustainable industrial automation. Simple mechanical guards cannot eliminate human error risks, while reliable interlock devices are indispensable. Schmersal mechanical safety door switches integrate decades of machinery safety expertise, balancing stable performance, flexible installation and full standard compliance. From small standalone machine tools to large intelligent production lines, they establish robust safety barriers between operators and moving equipment, helping machinery manufacturers achieve risk reduction and meet global safety regulatory requirements.
Glorient supplies genuine Schmersal AZ and AZM mechanical safety door switches with competitive pricing and worldwide delivery. Browse the safety door switches category, see representative models such as the AZ 16-03ZVRK, or send your model number via the quote request form.
Related Safety Door Switches / Magnetic Switches
Browse the complete Schmersal Safety Door Switches / Magnetic Switches range. Representative models available through Glorient:
Mechanical safety door switches with positive-break contacts are rated to EN ISO 14119 and support PL d / PL e circuits. Read SIL vs PL Explained for the underlying framework.
Frequently Asked Questions
What is the difference between the AZ and AZM series?
The AZ series are non-latching position switches for standard guard doors. The AZM series are solenoid interlock switches that provide locking force to prevent doors from being opened while the machine is running.
What is a positive-break contact and why is it required?
A positive-break contact is mechanically forced open by the actuator mechanism rather than relying on a spring. This guarantees the safety circuit opens even if the contacts weld, as required by EN ISO 14119 and IEC 60947-5-1.
What housing materials and actuator types are available?
Housings are available in glass-fibre reinforced thermoplastic for light duty and die-cast metal for heavy duty. Actuator types include straight, hinged and flexible designs to suit different door styles and mounting conditions.