Siemens 24V dc Safety Relay with 4 Safety Contacts 3SK1121-1CB44

Siemens 3SK1121-1CB44 is a 24V dc safety relay equipped with 4 safety contacts, engineered to deliver dependable safety monitoring and control in industrial automation environments.

This safety relay belongs to the Siemens SIRIUS 3SK1 Advanced series, which offers configurable single devices with expandable input and output modules connected via 3ZY12 device connectors for flexible system design.

The relay features a robust screw terminal interface and an IP20 protection rating, suitable for general industrial panel installations. Operating temperatures range from -25°C to 60°C, ensuring performance under varied site conditions.

The unit’s compact size with height 122mm, length 100mm, and width 22.5mm allows it to fit in confined control cabinets easily. It carries a safety category rating of 4, targeting high-integrity safety functions such as monitoring emergency stop circuits, protective door interlocks using electromechanical or solid-state switches, and non-contact safety equipment like light curtains and laser scanners.

Configuration is streamlined through a 4-way DIP switch for function selection and four LEDs for status indication. The relay also includes a Set/Reset button for loading settings and resetting the device. Internal self-test sequences continuously verify electronic and firmware functionality to maintain operational safety.

The time-delayed outputs, with an adjustable OFF delay potentiometer, enable precise control needed in critical safety functions. The relay supports both normally open and normally closed contact evaluations through external jumpers, adapting to various application requirements.

Manufactured in Germany, the Siemens 3SK1121-1CB44 offers robust reliability and quality for industrial, manufacturing, laboratory, and automation sectors requiring certified safety relay solutions.

The device supports a safety category of 4 for high safety standards. It operates within a temperature range from -25°C to 60°C. The relay includes 4-way DIP switch for flexible function setting and 4 LEDs for status display.

Features a Set/Reset button to load functions and perform resets. Screw terminal type ensures secure electrical connectivity. Compact dimensions of 122mm height, 100mm length, and 22.5mm width make it suitable for limited panel spaces.

The relay has an IP20 rating providing basic protection against solid foreign objects. Designed to monitor emergency stops, protective doors, and contact-free protection equipment. Made in Germany ensuring high manufacturing quality and reliability.

Designed with time-delayed outputs with OFF delay and potentiometer for time setting. Explore a wide range of Siemens Safety Relays and related automation products at EnvMart for comprehensive industrial safety solutions.