Safety Switch Schmersal AZ 16-12ZVRK-M20 User Manual

Quick guide from the manual

The Schmersal AZ 16-12ZVRK-M20 is a safety switch with a separate actuator designed for use with sliding, hinged, and removable safety guards. It is intended for industrial applications where hazardous situations must be terminated immediately upon opening the safety guard. All operations, including mounting and maintenance, must be performed by trained, authorized personnel.

Product description

The device is classified as a type 2 interlocking device according to EN ISO 14119. When the safety guard is opened, the NC contacts are positively opened, and the NO contacts are closed. The ordering code allows for various configurations, including different contact arrangements, latching forces, and connection types (cable entry or M12 connector).

Mounting

The switch can be mounted in any position, provided that the ingress of dirt and soiling into the used opening is avoided. Unused openings must be sealed with slot sealing plugs (available as an accessory). The actuator must be permanently fitted to the safety guard and protected against displacement using tamperproof screws, gluing, or by drilling the screw heads. The enclosure must not be used as an end stop.

Electrical connection

Electrical connections must only be performed by authorized personnel while the device is in a de-energized state. The contact labeling is located inside the wiring compartment. The conductor settle length is 6 mm. The switch is double-insulated, so a protective ground connector is not authorized. After wiring, ensure the compartment is free of dust and debris.

Set-up and maintenance

The safety function must be tested after installation. The device is generally maintenance-free, but a regular visual inspection and functional test are recommended, including:

• Checking for free movement of the actuating element.
• Checking cable entry and connections.
• Checking the switch enclosure for damage.
• Removing particles of dust and soiling.

Technical data

Key specifications include:

• Degree of protection: IP67
• Ambient temperature: -30 to +80 °C
• Switching principle: Slow action, positive break NC contact
• Safety contacts: 2
• Auxiliary contacts: 1
• Electrical ratings: 230 VAC / 4 A (AC-15) and 24 VDC / 4 A (DC-13)

Disassembly and disposal

The safety switchgear must be disassembled only in a de-energized condition. Disposal must be carried out in an appropriate manner in accordance with national prescriptions and legislations.