Phoenix Contact Safety Relay 24V DC, 1 Channel, DIN Rail, Manual Reset, PSR-MS21, 3.1W,

The Phoenix Contact PSR-MS21 safety relay is an advanced, single-channel protective relay engineered to monitor and ensure the safety of automated systems in industrial, laboratory, and manufacturing environments. Operating at 24V DC and consuming just 3.1W of power, this device provides rapid response to abnormal circuit conditions, protecting people, equipment, and processes.

Featuring a compact body that mounts easily onto standard DIN rails, the PSR-MS21 streamlines panel organization while requiring minimal installation space. It supports manual reset and integrated emergency stop functionality, giving technicians and operators direct, simple control for resetting and emergency intervention. Its screw terminal design ensures fast, secure electrical connections for system integrators.

With two normally open (2 NO) safety contacts and a maximum contact current of 6A, this relay safely interfaces between failsafe control outputs and downstream actuators such as solenoid valves. The PSR-MS21 maintains reliable isolation and adapts power to connected loads, enhancing operational reliability.

The relay is certified for safety categories up to Cat.4/PL e (EN ISO 13849-1) and SILCL 3 (EN IEC 62061), meeting rigorous international requirements for critical applications. It remains fully operational across a wide ambient temperature range from -40°C to 60°C, making it ideal for challenging industrial locations. The unit's IP20 enclosure rating provides effective protection against accidental contact and ingress of solid objects.

Designed with a length of 93mm, width of 7mm, and height of 102.5mm, the PSR-MS21 seamlessly fits alongside other control gear in modern panels. It is compatible with standard 24V DC control circuits and supports AC switching up to 250V AC and DC switching to 24V DC, ensuring flexible integration options. The device includes polarity reversal protection to guard against miswiring and ensure system longevity.

Common use cases include safety circuit integration for production lines, material handling systems, robotics, process automation, and machine-building sectors. The Phoenix Contact PSR-MS21 is a reliable solution for end users and panel builders seeking compact, standards-compliant safety relays for electrical protection and machine safeguarding.

Explore more Phoenix Contact industrial automation and Safety Relays in the EnvMart Electronics & Electricals category for solutions tailored to your engineering needs.