General
Operating principle	Electromechanical
Encoding level	low
Housing material	Glass-fibre reinforced thermoplastic
Latching force	30 N
Actuation speed	2 m/s
Degree of protection	IP67
Operation temperature	-30 to +60 °C
Rated voltage	24 VAC/DC
Thermal continuous current	6 A
Power	10 W
Safety contacts	4
Auxiliary contacts	2
Service life	20 years
Connection type	Screw terminals
Approvals	IFA, cULus, CCC
Standards	EN ISO 13849-1, EN ISO 14119, EN IEC 60947-5-1

The safety interlock AZM 161SK-12/12RKA-024 from Schmersal is an electromechanical device for use in industrial safety applications. It is designed for the secure locking of movable, removable, or rotatable protective devices to prevent access to hazardous machine parts during operation. The device operates on the operating current principle, requiring power supply for the locking function, and features a robust construction made of glass-fibre-reinforced thermoplastic, ensuring high mechanical load capacity and resistance to environmental influences. The holding force is up to 2,600 N, enabling secure retention of even heavier protective devices. The latching force of 30 N ensures a secure and reliable locking action upon actuation. The actuation speed is limited to a maximum of 2 m/s to ensure safe and controlled movement of the protective device.

Applications

The AZM 161SK-12/12RKA-024 is designed for demanding industrial environments, particularly in machine building, manufacturing technology, and plant engineering. It is suitable for protective devices that are frequently moved or removed, such as sliding doors, covers, or rotating plates. The compact design with dimensions 30 x 130 x 90 mm allows for flexible mounting on various machine constructions. The IP67 protection rating makes the device suitable for outdoor use or in humid, dusty environments, as it is dust- and waterproof.

Functions and Equipment in Detail

The device features 4 safety contacts and 2 auxiliary contacts, enabling high flexibility when integrating into existing control systems. The safety contacts are designed according to the rest current principle, meaning the circuit is closed during normal operation and interrupted in case of fault or unlocking. The low coding according to EN ISO 14119 simplifies integration into existing systems. The mechanical service life is at least 1,000,000 switching cycles, with B10D values of 2,000,000 switching cycles for normally closed (NC) contacts and 1,000,000 switching cycles for normally open (NO) contacts. The service life is specified as 20 years, indicating high durability.

Technology Explained Simply

The safety interlock is operated with a rated voltage of 24 VAC/DC and has a thermal continuous current of 6 A. The maximum power is 10 W. Power supply is via screw terminals, ensuring a secure and reliable electrical connection. The device is certified according to IFA, cULus, and CCC and complies with international safety standards EN ISO 13849-1 and EN IEC 60947-5-1. These certifications guarantee compliance with required safety requirements for use in industrial plants.

Compatibility and Accessories

Various actuation variants are available for use with the AZM 161SK-12/12RKA-024, including the actuator AZM 161-B1 for sliding doors and the actuator AZM 161-B1-2177 with centring aid. These components allow application-specific adaptation of the locking mechanism. Manual auxiliary unlocking is possible using a 3-point key M5, which is available as an accessory. This is particularly useful for maintenance or setup tasks requiring temporary unlocking.

Mounting and Installation

Mounting is carried out on the machine or plant, with careful planning of the positioning of the interlock device and the actuation mechanism required to ensure secure and reliable locking. The screw terminals allow for easy and secure electrical connection. The actuation speed of max. 2 m/s must be considered during planning of motion sequences. The operating temperature ranges from -30 °C to +60 °C, enabling use in a wide range of environments.

Advantages in Operation

The AZM 161SK-12/12RKA-024 offers high reliability due to its robust construction and long service life. The IP67 protection rating protects the device from dust and water, expanding its range of applications. The low coding simplifies integration into existing systems. The combination of 4 safety and 2 auxiliary contacts enables flexible use in various control configurations. Certifications according to international standards ensure safety and proper operation in industrial applications.